Merge pull request #3608 from adafruit/6.0.x

Update main with latest 6.0.x

71 files changed, 2351 insertions, 184 deletions

diff --git a/shared-bindings/_bleio/Adapter.c b/shared-bindings/_bleio/Adapter.c
index 682177093..7d7076aab 100644
--- a/shared-bindings/_bleio/Adapter.c
+++ b/shared-bindings/_bleio/Adapter.c
@@ -33,8 +33,8 @@
 #include "shared-bindings/_bleio/Address.h"
 #include "shared-bindings/_bleio/Adapter.h"
 
-#define ADV_INTERVAL_MIN (0.0020f)
-#define ADV_INTERVAL_MIN_STRING "0.0020"
+#define ADV_INTERVAL_MIN (0.02001f)
+#define ADV_INTERVAL_MIN_STRING "0.02001"
 #define ADV_INTERVAL_MAX (10.24f)
 #define ADV_INTERVAL_MAX_STRING "10.24"
 // 20ms is recommended by Apple
@@ -307,7 +307,7 @@ STATIC mp_obj_t bleio_adapter_start_scan(size_t n_args, const mp_obj_t *pos_args
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    mp_float_t timeout = 0;
+    mp_float_t timeout = 0.0f;
     if (args[ARG_timeout].u_obj != mp_const_none) {
         timeout = mp_obj_get_float(args[ARG_timeout].u_obj);
     }
@@ -325,6 +325,13 @@ STATIC mp_obj_t bleio_adapter_start_scan(size_t n_args, const mp_obj_t *pos_args
         mp_raise_ValueError_varg(translate("interval must be in range %s-%s"), INTERVAL_MIN_STRING, INTERVAL_MAX_STRING);
     }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wfloat-equal"
+    if (timeout != 0.0f && timeout < interval) {
+        mp_raise_ValueError(translate("non-zero timeout must be >= interval"));
+    }
+#pragma GCC diagnostic pop
+
     const mp_float_t window = mp_obj_float_get(args[ARG_window].u_obj);
     if (window > interval) {
         mp_raise_ValueError(translate("window must be <= interval"));
diff --git a/shared-bindings/_bleio/Characteristic.c b/shared-bindings/_bleio/Characteristic.c
index 5e384a44c..a0751b7e3 100644
--- a/shared-bindings/_bleio/Characteristic.c
+++ b/shared-bindings/_bleio/Characteristic.c
@@ -110,8 +110,8 @@ STATIC mp_obj_t bleio_characteristic_add_to_service(size_t n_args, const mp_obj_
     common_hal_bleio_attribute_security_mode_check_valid(write_perm);
 
     const mp_int_t max_length_int = args[ARG_max_length].u_int;
-    if (max_length_int <= 0) {
-        mp_raise_ValueError(translate("max_length must be > 0"));
+    if (max_length_int < 0) {
+        mp_raise_ValueError(translate("max_length must be >= 0"));
     }
     const size_t max_length = (size_t) max_length_int;
     const bool fixed_length =  args[ARG_fixed_length].u_bool;
diff --git a/shared-bindings/_bleio/Descriptor.c b/shared-bindings/_bleio/Descriptor.c
index c313007c6..60f0acf44 100644
--- a/shared-bindings/_bleio/Descriptor.c
+++ b/shared-bindings/_bleio/Descriptor.c
@@ -101,8 +101,8 @@ STATIC mp_obj_t bleio_descriptor_add_to_characteristic(size_t n_args, const mp_o
     common_hal_bleio_attribute_security_mode_check_valid(write_perm);
 
     const mp_int_t max_length_int = args[ARG_max_length].u_int;
-    if (max_length_int <= 0) {
-        mp_raise_ValueError(translate("max_length must be > 0"));
+    if (max_length_int < 0) {
+        mp_raise_ValueError(translate("max_length must be >= 0"));
     }
     const size_t max_length = (size_t) max_length_int;
     const bool fixed_length =  args[ARG_fixed_length].u_bool;
diff --git a/shared-bindings/_pixelbuf/PixelBuf.c b/shared-bindings/_pixelbuf/PixelBuf.c
index 88e8aa801..a4b5b5b1b 100644
--- a/shared-bindings/_pixelbuf/PixelBuf.c
+++ b/shared-bindings/_pixelbuf/PixelBuf.c
@@ -185,7 +185,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(pixelbuf_pixelbuf_get_brightness_obj, pixelbuf_pixelbu
 
 
 STATIC mp_obj_t pixelbuf_pixelbuf_obj_set_brightness(mp_obj_t self_in, mp_obj_t value) {
-    mp_float_t brightness = mp_obj_float_get(value);
+    mp_float_t brightness = mp_obj_get_float(value);
     if (brightness > 1) {
         brightness = 1;
     } else if (brightness < 0) {
diff --git a/shared-bindings/_typing/__init__.pyi b/shared-bindings/_typing/__init__.pyi
index 48e68a8d5..cc4a0a439 100644
--- a/shared-bindings/_typing/__init__.pyi
+++ b/shared-bindings/_typing/__init__.pyi
@@ -2,6 +2,9 @@
 
 from typing import Union
 
+import alarm
+import alarm.pin
+import alarm.time
 import array
 import audiocore
 import audiomixer
@@ -52,3 +55,14 @@ FrameBuffer = Union[rgbmatrix.RGBMatrix]
 
   - `rgbmatrix.RGBMatrix`
 """
+
+Alarm = Union[
+    alarm.pin.PinAlarm, alarm.time.TimeAlarm
+]
+"""Classes that implement alarms for sleeping and asynchronous notification.
+
+  - `alarm.pin.PinAlarm`
+  - `alarm.time.TimeAlarm`
+
+  You can use these alarms to wake up from light or deep sleep.
+"""
diff --git a/shared-bindings/adafruit_bus_device/I2CDevice.c b/shared-bindings/adafruit_bus_device/I2CDevice.c
new file mode 100644
index 000000000..a4c04e198
--- /dev/null
+++ b/shared-bindings/adafruit_bus_device/I2CDevice.c
@@ -0,0 +1,259 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Mark Komus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+// This file contains all of the Python API definitions for the
+// busio.I2C class.
+
+#include "shared-bindings/microcontroller/Pin.h"
+#include "shared-bindings/adafruit_bus_device/I2CDevice.h"
+#include "shared-bindings/util.h"
+#include "shared-module/adafruit_bus_device/I2CDevice.h"
+
+#include "lib/utils/buffer_helper.h"
+#include "lib/utils/context_manager_helpers.h"
+#include "py/runtime.h"
+#include "supervisor/shared/translate.h"
+
+
+//| class I2CDevice:
+//|     """I2C Device Manager"""
+//|
+//|     def __init__(self, i2c: busio.I2C, device_address: int, probe: bool = True) -> None:
+//|
+//|         """Represents a single I2C device and manages locking the bus and the device
+//|         address.
+//|         :param ~busio.I2C i2c: The I2C bus the device is on
+//|         :param int device_address: The 7 bit device address
+//|         :param bool probe: Probe for the device upon object creation, default is true
+//|
+//|         Example::
+//|
+//|             import busio
+//|             from board import *
+//|             from adafruit_bus_device.i2c_device import I2CDevice
+//|             with busio.I2C(SCL, SDA) as i2c:
+//|                 device = I2CDevice(i2c, 0x70)
+//|                 bytes_read = bytearray(4)
+//|                 with device:
+//|                     device.readinto(bytes_read)
+//|                 # A second transaction
+//|                 with device:
+//|                     device.write(bytes_read)"""
+//|     ...
+//|
+STATIC mp_obj_t adafruit_bus_device_i2cdevice_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    adafruit_bus_device_i2cdevice_obj_t *self = m_new_obj(adafruit_bus_device_i2cdevice_obj_t);
+    self->base.type = &adafruit_bus_device_i2cdevice_type;
+    enum { ARG_i2c, ARG_device_address, ARG_probe };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_i2c, MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_device_address, MP_ARG_REQUIRED | MP_ARG_INT },
+        { MP_QSTR_probe, MP_ARG_BOOL, {.u_bool = true} },
+    };
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    busio_i2c_obj_t* i2c = args[ARG_i2c].u_obj;
+
+    common_hal_adafruit_bus_device_i2cdevice_construct(MP_OBJ_TO_PTR(self), i2c, args[ARG_device_address].u_int);
+    if (args[ARG_probe].u_bool == true) {
+        common_hal_adafruit_bus_device_i2cdevice_probe_for_device(self);
+    }
+
+    return (mp_obj_t)self;
+}
+
+//|     def __enter__(self) -> I2CDevice:
+//|         """Context manager entry to lock bus."""
+//|         ...
+//|
+STATIC mp_obj_t adafruit_bus_device_i2cdevice_obj___enter__(mp_obj_t self_in) {
+    adafruit_bus_device_i2cdevice_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    common_hal_adafruit_bus_device_i2cdevice_lock(self);
+    return self;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(adafruit_bus_device_i2cdevice___enter___obj, adafruit_bus_device_i2cdevice_obj___enter__);
+
+//|     def __exit__(self) -> None:
+//|         """Automatically unlocks the bus on exit."""
+//|         ...
+//|
+STATIC mp_obj_t adafruit_bus_device_i2cdevice_obj___exit__(size_t n_args, const mp_obj_t *args) {
+    common_hal_adafruit_bus_device_i2cdevice_unlock(MP_OBJ_TO_PTR(args[0]));
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(adafruit_bus_device_i2cdevice___exit___obj, 4, 4, adafruit_bus_device_i2cdevice_obj___exit__);
+
+//|     def readinto(self, buf: WriteableBuffer, *, start: int = 0, end: int = 0) -> None:
+//|         """Read into ``buf`` from the device. The number of bytes read will be the
+//|         length of ``buf``.
+//|         If ``start`` or ``end`` is provided, then the buffer will be sliced
+//|         as if ``buf[start:end]``. This will not cause an allocation like
+//|         ``buf[start:end]`` will so it saves memory.
+//|         :param bytearray buf: buffer to write into
+//|         :param int start: Index to start writing at
+//|         :param int end: Index to write up to but not include; if None, use ``len(buf)``"""
+//|         ...
+//|
+STATIC void readinto(adafruit_bus_device_i2cdevice_obj_t *self, mp_obj_t buffer, int32_t start, mp_int_t end) {
+    mp_buffer_info_t bufinfo;
+    mp_get_buffer_raise(buffer, &bufinfo, MP_BUFFER_WRITE);
+
+    size_t length = bufinfo.len;
+    normalize_buffer_bounds(&start, end, &length);
+    if (length == 0) {
+        mp_raise_ValueError(translate("Buffer must be at least length 1"));
+    }
+
+    uint8_t status = common_hal_adafruit_bus_device_i2cdevice_readinto(MP_OBJ_TO_PTR(self), ((uint8_t*)bufinfo.buf) + start, length);
+    if (status != 0) {
+        mp_raise_OSError(status);
+    }
+}
+
+STATIC mp_obj_t adafruit_bus_device_i2cdevice_readinto(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    enum { ARG_buffer, ARG_start, ARG_end };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_buffer,     MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_start,      MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_end,        MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = INT_MAX} },
+    };
+
+    adafruit_bus_device_i2cdevice_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
+
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    readinto(self, args[ARG_buffer].u_obj, args[ARG_start].u_int, args[ARG_end].u_int);
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_KW(adafruit_bus_device_i2cdevice_readinto_obj, 2, adafruit_bus_device_i2cdevice_readinto);
+
+//|     def write(self, buf: ReadableBuffer, *, start: int = 0, end: int = 0) -> None:
+//|         """Write the bytes from ``buffer`` to the device, then transmit a stop bit.
+//|         If ``start`` or ``end`` is provided, then the buffer will be sliced
+//|         as if ``buffer[start:end]``. This will not cause an allocation like
+//|         ``buffer[start:end]`` will so it saves memory.
+//|         :param bytearray buf: buffer containing the bytes to write
+//|         :param int start: Index to start writing from
+//|         :param int end: Index to read up to but not include; if None, use ``len(buf)``
+//|         """
+//|         ...
+//|
+STATIC void write(adafruit_bus_device_i2cdevice_obj_t *self, mp_obj_t buffer, int32_t start, mp_int_t end, bool transmit_stop_bit) {
+    mp_buffer_info_t bufinfo;
+    mp_get_buffer_raise(buffer, &bufinfo, MP_BUFFER_READ);
+
+    size_t length = bufinfo.len;
+    normalize_buffer_bounds(&start, end, &length);
+    if (length == 0) {
+        mp_raise_ValueError(translate("Buffer must be at least length 1"));
+    }
+
+    uint8_t status = common_hal_adafruit_bus_device_i2cdevice_write(MP_OBJ_TO_PTR(self), ((uint8_t*)bufinfo.buf) + start, length, transmit_stop_bit);
+    if (status != 0) {
+        mp_raise_OSError(status);
+    }
+}
+
+STATIC mp_obj_t adafruit_bus_device_i2cdevice_write(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    enum { ARG_buffer, ARG_start, ARG_end };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_buffer,     MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_start,      MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_end,        MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = INT_MAX} },
+    };
+    adafruit_bus_device_i2cdevice_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
+
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    write(self, args[ARG_buffer].u_obj, args[ARG_start].u_int, args[ARG_end].u_int, true);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_KW(adafruit_bus_device_i2cdevice_write_obj, 2, adafruit_bus_device_i2cdevice_write);
+
+
+//|     def write_then_readinto(self, out_buffer: WriteableBuffer, in_buffer: ReadableBuffer, *, out_start: int = 0, out_end: int = 0, in_start: int = 0, in_end: int = 0) -> None:
+//|         """Write the bytes from ``out_buffer`` to the device, then immediately
+//|         reads into ``in_buffer`` from the device. The number of bytes read
+//|         will be the length of ``in_buffer``.
+//|         If ``out_start`` or ``out_end`` is provided, then the output buffer
+//|         will be sliced as if ``out_buffer[out_start:out_end]``. This will
+//|         not cause an allocation like ``buffer[out_start:out_end]`` will so
+//|         it saves memory.
+//|         If ``in_start`` or ``in_end`` is provided, then the input buffer
+//|         will be sliced as if ``in_buffer[in_start:in_end]``. This will not
+//|         cause an allocation like ``in_buffer[in_start:in_end]`` will so
+//|         it saves memory.
+//|         :param bytearray out_buffer: buffer containing the bytes to write
+//|         :param bytearray in_buffer: buffer containing the bytes to read into
+//|         :param int out_start: Index to start writing from
+//|         :param int out_end: Index to read up to but not include; if None, use ``len(out_buffer)``
+//|         :param int in_start: Index to start writing at
+//|         :param int in_end: Index to write up to but not include; if None, use ``len(in_buffer)``
+//|         """
+//|         ...
+//|
+STATIC mp_obj_t adafruit_bus_device_i2cdevice_write_then_readinto(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    enum { ARG_out_buffer, ARG_in_buffer, ARG_out_start, ARG_out_end, ARG_in_start, ARG_in_end };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_out_buffer,    MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_in_buffer,     MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_out_start,     MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_out_end,       MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = INT_MAX} },
+        { MP_QSTR_in_start,      MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_in_end,        MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = INT_MAX} },
+    };
+    adafruit_bus_device_i2cdevice_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
+
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    write(self, args[ARG_out_buffer].u_obj, args[ARG_out_start].u_int, args[ARG_out_end].u_int, false);
+
+    readinto(self, args[ARG_in_buffer].u_obj, args[ARG_in_start].u_int, args[ARG_in_end].u_int);
+
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_KW(adafruit_bus_device_i2cdevice_write_then_readinto_obj, 3, adafruit_bus_device_i2cdevice_write_then_readinto);
+
+STATIC const mp_rom_map_elem_t adafruit_bus_device_i2cdevice_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&adafruit_bus_device_i2cdevice___enter___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&adafruit_bus_device_i2cdevice___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&adafruit_bus_device_i2cdevice_readinto_obj) },
+    { MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&adafruit_bus_device_i2cdevice_write_obj) },
+    { MP_ROM_QSTR(MP_QSTR_write_then_readinto), MP_ROM_PTR(&adafruit_bus_device_i2cdevice_write_then_readinto_obj) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(adafruit_bus_device_i2cdevice_locals_dict, adafruit_bus_device_i2cdevice_locals_dict_table);
+
+const mp_obj_type_t adafruit_bus_device_i2cdevice_type = {
+   { &mp_type_type },
+   .name = MP_QSTR_I2CDevice,
+   .make_new = adafruit_bus_device_i2cdevice_make_new,
+   .locals_dict = (mp_obj_dict_t*)&adafruit_bus_device_i2cdevice_locals_dict,
+};
diff --git a/shared-bindings/adafruit_bus_device/I2CDevice.h b/shared-bindings/adafruit_bus_device/I2CDevice.h
new file mode 100644
index 000000000..cf7b1321a
--- /dev/null
+++ b/shared-bindings/adafruit_bus_device/I2CDevice.h
@@ -0,0 +1,53 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Mark Komus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+// Machine is the HAL for low-level, hardware accelerated functions. It is not
+// meant to simplify APIs, its only meant to unify them so that other modules
+// do not require port specific logic.
+//
+// This file includes externs for all functions a port should implement to
+// support the machine module.
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE_I2CDEVICE_H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE_I2CDEVICE_H
+
+#include "py/obj.h"
+
+#include "shared-module/adafruit_bus_device/I2CDevice.h"
+//#include "shared-bindings/busio/I2C.h"
+
+// Type object used in Python. Should be shared between ports.
+extern const mp_obj_type_t adafruit_bus_device_i2cdevice_type;
+
+// Initializes the hardware peripheral.
+extern void common_hal_adafruit_bus_device_i2cdevice_construct(adafruit_bus_device_i2cdevice_obj_t *self, busio_i2c_obj_t *i2c, uint8_t device_address);
+extern uint8_t common_hal_adafruit_bus_device_i2cdevice_readinto(adafruit_bus_device_i2cdevice_obj_t *self, mp_obj_t buffer, size_t length);
+extern uint8_t common_hal_adafruit_bus_device_i2cdevice_write(adafruit_bus_device_i2cdevice_obj_t *self, mp_obj_t buffer, size_t length, bool transmit_stop_bit);
+extern void common_hal_adafruit_bus_device_i2cdevice_lock(adafruit_bus_device_i2cdevice_obj_t *self);
+extern void common_hal_adafruit_bus_device_i2cdevice_unlock(adafruit_bus_device_i2cdevice_obj_t *self);
+extern void common_hal_adafruit_bus_device_i2cdevice_probe_for_device(adafruit_bus_device_i2cdevice_obj_t *self);
+
+#endif // MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE_I2CDEVICE_H
diff --git a/shared-bindings/adafruit_bus_device/SPIDevice.c b/shared-bindings/adafruit_bus_device/SPIDevice.c
new file mode 100644
index 000000000..e127e39b8
--- /dev/null
+++ b/shared-bindings/adafruit_bus_device/SPIDevice.c
@@ -0,0 +1,128 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Mark Komus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/microcontroller/Pin.h"
+#include "shared-bindings/adafruit_bus_device/SPIDevice.h"
+#include "shared-bindings/util.h"
+#include "shared-module/adafruit_bus_device/SPIDevice.h"
+#include "common-hal/digitalio/DigitalInOut.h"
+#include "shared-bindings/digitalio/DigitalInOut.h"
+
+
+#include "lib/utils/buffer_helper.h"
+#include "lib/utils/context_manager_helpers.h"
+#include "py/runtime.h"
+#include "supervisor/shared/translate.h"
+
+
+//| class SPIDevice:
+//|     """SPI Device Manager"""
+//|
+//|     def __init__(self, spi: busio.SPI, chip_select: microcontroller.Pin, *, baudrate: int = 100000, polarity: int = 0, phase: int = 0, extra_clocks : int = 0) -> None:
+//|
+//|         """
+//|         Represents a single SPI device and manages locking the bus and the device address.
+//|         :param ~busio.SPI spi: The SPI bus the device is on
+//|         :param ~digitalio.DigitalInOut chip_select: The chip select pin object that implements the DigitalInOut API.
+//|         :param int extra_clocks: The minimum number of clock cycles to cycle the bus after CS is high. (Used for SD cards.)
+//|
+//|         Example::
+//|
+//|             import busio
+//|             import digitalio
+//|             from board import *
+//|             from adafruit_bus_device.spi_device import SPIDevice
+//|             with busio.SPI(SCK, MOSI, MISO) as spi_bus:
+//|                 cs = digitalio.DigitalInOut(D10)
+//|                 device = SPIDevice(spi_bus, cs)
+//|                 bytes_read = bytearray(4)
+//|                 # The object assigned to spi in the with statements below
+//|                 # is the original spi_bus object. We are using the busio.SPI
+//|                 # operations busio.SPI.readinto() and busio.SPI.write().
+//|                 with device as spi:
+//|                     spi.readinto(bytes_read)
+//|                 # A second transaction
+//|                 with device as spi:
+//|                     spi.write(bytes_read)"""
+//|     ...
+//|
+STATIC mp_obj_t adafruit_bus_device_spidevice_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    adafruit_bus_device_spidevice_obj_t *self = m_new_obj(adafruit_bus_device_spidevice_obj_t);
+    self->base.type = &adafruit_bus_device_spidevice_type;
+    enum { ARG_spi, ARG_chip_select, ARG_baudrate, ARG_polarity, ARG_phase, ARG_extra_clocks };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_spi, MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_chip_select, MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
+        { MP_QSTR_baudrate, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 100000} },
+        { MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_extra_clocks, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+    };
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    busio_spi_obj_t* spi = args[ARG_spi].u_obj;
+
+    common_hal_adafruit_bus_device_spidevice_construct(MP_OBJ_TO_PTR(self), spi, args[ARG_chip_select].u_obj, args[ARG_baudrate].u_int, args[ARG_polarity].u_int,
+        args[ARG_phase].u_int, args[ARG_extra_clocks].u_int);
+
+    if (args[ARG_chip_select].u_obj != MP_OBJ_NULL) {
+        digitalinout_result_t result = common_hal_digitalio_digitalinout_switch_to_output(MP_OBJ_TO_PTR(args[ARG_chip_select].u_obj),
+            true, DRIVE_MODE_PUSH_PULL);
+        if (result == DIGITALINOUT_INPUT_ONLY) {
+            mp_raise_NotImplementedError(translate("Pin is input only"));
+        }
+    }
+
+    return (mp_obj_t)self;
+}
+
+STATIC mp_obj_t adafruit_bus_device_spidevice_obj___enter__(mp_obj_t self_in) {
+    adafruit_bus_device_spidevice_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    common_hal_adafruit_bus_device_spidevice_enter(self);
+    return self->spi;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(adafruit_bus_device_spidevice___enter___obj, adafruit_bus_device_spidevice_obj___enter__);
+
+STATIC mp_obj_t adafruit_bus_device_spidevice_obj___exit__(size_t n_args, const mp_obj_t *args) {
+    common_hal_adafruit_bus_device_spidevice_exit(MP_OBJ_TO_PTR(args[0]));
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(adafruit_bus_device_spidevice___exit___obj, 4, 4, adafruit_bus_device_spidevice_obj___exit__);
+
+STATIC const mp_rom_map_elem_t adafruit_bus_device_spidevice_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&adafruit_bus_device_spidevice___enter___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&adafruit_bus_device_spidevice___exit___obj) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(adafruit_bus_device_spidevice_locals_dict, adafruit_bus_device_spidevice_locals_dict_table);
+
+const mp_obj_type_t adafruit_bus_device_spidevice_type = {
+   { &mp_type_type },
+   .name = MP_QSTR_SPIDevice,
+   .make_new = adafruit_bus_device_spidevice_make_new,
+   .locals_dict = (mp_obj_dict_t*)&adafruit_bus_device_spidevice_locals_dict,
+};
diff --git a/shared-bindings/adafruit_bus_device/SPIDevice.h b/shared-bindings/adafruit_bus_device/SPIDevice.h
new file mode 100644
index 000000000..5596b157f
--- /dev/null
+++ b/shared-bindings/adafruit_bus_device/SPIDevice.h
@@ -0,0 +1,50 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Mark Komus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+// Machine is the HAL for low-level, hardware accelerated functions. It is not
+// meant to simplify APIs, its only meant to unify them so that other modules
+// do not require port specific logic.
+//
+// This file includes externs for all functions a port should implement to
+// support the machine module.
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE_SPIDEVICE_H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE_SPIDEVICE_H
+
+#include "py/obj.h"
+
+#include "shared-module/adafruit_bus_device/SPIDevice.h"
+
+// Type object used in Python. Should be shared between ports.
+extern const mp_obj_type_t adafruit_bus_device_spidevice_type;
+
+// Initializes the hardware peripheral.
+extern void common_hal_adafruit_bus_device_spidevice_construct(adafruit_bus_device_spidevice_obj_t *self, busio_spi_obj_t *spi,  digitalio_digitalinout_obj_t *cs,
+    uint32_t baudrate, uint8_t polarity, uint8_t phase, uint8_t extra_clocks);
+extern void common_hal_adafruit_bus_device_spidevice_enter(adafruit_bus_device_spidevice_obj_t *self);
+extern void common_hal_adafruit_bus_device_spidevice_exit(adafruit_bus_device_spidevice_obj_t *self);
+
+#endif // MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE_SPIDEVICE_H
diff --git a/shared-bindings/adafruit_bus_device/__init__.c b/shared-bindings/adafruit_bus_device/__init__.c
new file mode 100644
index 000000000..e01abcab3
--- /dev/null
+++ b/shared-bindings/adafruit_bus_device/__init__.c
@@ -0,0 +1,78 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Mark Komus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdint.h>
+
+#include "py/obj.h"
+#include "py/runtime.h"
+#include "py/mphal.h"
+#include "py/objproperty.h"
+
+#include "shared-bindings/adafruit_bus_device/__init__.h"
+#include "shared-bindings/adafruit_bus_device/I2CDevice.h"
+#include "shared-bindings/adafruit_bus_device/SPIDevice.h"
+
+STATIC const mp_rom_map_elem_t adafruit_bus_device_i2c_device_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_i2c_device) },
+    { MP_ROM_QSTR(MP_QSTR_I2CDevice),   MP_ROM_PTR(&adafruit_bus_device_i2cdevice_type) },
+};
+STATIC MP_DEFINE_CONST_DICT(adafruit_bus_device_i2c_device_globals, adafruit_bus_device_i2c_device_globals_table);
+
+const mp_obj_module_t adafruit_bus_device_i2c_device_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&adafruit_bus_device_i2c_device_globals,
+};
+
+STATIC const mp_rom_map_elem_t adafruit_bus_device_spi_device_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_spi_device) },
+    { MP_ROM_QSTR(MP_QSTR_SPIDevice),   MP_ROM_PTR(&adafruit_bus_device_spidevice_type) },
+};
+STATIC MP_DEFINE_CONST_DICT(adafruit_bus_device_spi_device_globals, adafruit_bus_device_spi_device_globals_table);
+
+const mp_obj_module_t adafruit_bus_device_spi_device_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&adafruit_bus_device_spi_device_globals,
+};
+
+//| """Hardware accelerated external bus access
+//|
+//| The I2CDevice and SPIDevice helper classes make managing transaction state on a bus easy.
+//| For example, they manage locking the bus to prevent other concurrent access. For SPI
+//| devices, it manages the chip select and protocol changes such as mode. For I2C, it
+//| manages the device address."""
+//|
+STATIC const mp_rom_map_elem_t adafruit_bus_device_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_adafruit_bus_device) },
+    { MP_ROM_QSTR(MP_QSTR_i2c_device),   MP_ROM_PTR(&adafruit_bus_device_i2c_device_module) },
+    { MP_ROM_QSTR(MP_QSTR_spi_device),   MP_ROM_PTR(&adafruit_bus_device_spi_device_module) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(adafruit_bus_device_module_globals, adafruit_bus_device_module_globals_table);
+
+const mp_obj_module_t adafruit_bus_device_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&adafruit_bus_device_module_globals,
+};
diff --git a/shared-bindings/adafruit_bus_device/__init__.h b/shared-bindings/adafruit_bus_device/__init__.h
new file mode 100644
index 000000000..4a669807b
--- /dev/null
+++ b/shared-bindings/adafruit_bus_device/__init__.h
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Mark Komus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE___INIT___H
+
+// Nothing now.
+
+#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE___INIT___H
diff --git a/shared-bindings/alarm/SleepMemory.c b/shared-bindings/alarm/SleepMemory.c
new file mode 100644
index 000000000..bec0b7665
--- /dev/null
+++ b/shared-bindings/alarm/SleepMemory.c
@@ -0,0 +1,159 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
+ * Copyright (c) 2020 Dan Halbert for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/binary.h"
+#include "py/objproperty.h"
+#include "py/runtime.h"
+#include "py/runtime0.h"
+
+#include "shared-bindings/alarm/SleepMemory.h"
+#include "supervisor/shared/translate.h"
+
+//| class SleepMemory:
+//|     """Store raw bytes in RAM that persists during deep sleep.
+//|     The class acts as a ``bytearray``.
+//|     If power is lost, the memory contents are lost.
+//|
+//|     Note that this class can't be imported and used directly. The sole
+//|     instance of :class:`SleepMemory` is available at
+//|     :attr:`alarm.sleep_memory`.
+//|
+//|     Usage::
+//|
+//|        import alarm
+//|        alarm.sleep_memory[0] = True
+//|        alarm.sleep_memory[1] = 12
+//|     """
+
+//|     def __init__(self) -> None:
+//|         """Not used. Access the sole instance through `alarm.sleep_memory`."""
+//|         ...
+//|
+
+STATIC const mp_rom_map_elem_t alarm_sleep_memory_locals_dict_table[] = {
+};
+
+STATIC MP_DEFINE_CONST_DICT(alarm_sleep_memory_locals_dict, alarm_sleep_memory_locals_dict_table);
+
+//|     @overload
+//|     def __getitem__(self, index: slice) -> bytearray: ...
+//|     @overload
+//|     def __getitem__(self, index: int) -> int:
+//|         """Returns the value at the given index."""
+//|         ...
+//|
+//|     @overload
+//|     def __setitem__(self, index: slice, value: ReadableBuffer) -> None: ...
+//|     @overload
+//|     def __setitem__(self, index: int, value: int) -> None:
+//|         """Set the value at the given index."""
+//|         ...
+//|
+STATIC mp_obj_t alarm_sleep_memory_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value) {
+    if (value == MP_OBJ_NULL) {
+        // delete item
+        // slice deletion
+        return MP_OBJ_NULL; // op not supported
+    } else {
+        alarm_sleep_memory_obj_t *self = MP_OBJ_TO_PTR(self_in);
+        if (0) {
+#if MICROPY_PY_BUILTINS_SLICE
+        } else if (MP_OBJ_IS_TYPE(index_in, &mp_type_slice)) {
+            mp_bound_slice_t slice;
+            if (!mp_seq_get_fast_slice_indexes(common_hal_alarm_sleep_memory_get_length(self), index_in, &slice)) {
+                mp_raise_NotImplementedError(translate("only slices with step=1 (aka None) are supported"));
+            }
+            if (value != MP_OBJ_SENTINEL) {
+                #if MICROPY_PY_ARRAY_SLICE_ASSIGN
+                // Assign
+                size_t src_len = slice.stop - slice.start;
+                uint8_t* src_items;
+                if (MP_OBJ_IS_TYPE(value, &mp_type_array) ||
+                        MP_OBJ_IS_TYPE(value, &mp_type_bytearray) ||
+                        MP_OBJ_IS_TYPE(value, &mp_type_memoryview) ||
+                        MP_OBJ_IS_TYPE(value, &mp_type_bytes)) {
+                    mp_buffer_info_t bufinfo;
+                    mp_get_buffer_raise(value, &bufinfo, MP_BUFFER_READ);
+                    if (bufinfo.len != src_len) {
+                        mp_raise_ValueError(translate("Slice and value different lengths."));
+                    }
+                    src_len = bufinfo.len;
+                    src_items = bufinfo.buf;
+                    if (1 != mp_binary_get_size('@', bufinfo.typecode, NULL)) {
+                        mp_raise_ValueError(translate("Array values should be single bytes."));
+                    }
+                } else {
+                    mp_raise_NotImplementedError(translate("array/bytes required on right side"));
+                }
+
+                if (!common_hal_alarm_sleep_memory_set_bytes(self, slice.start, src_items, src_len)) {
+                    mp_raise_RuntimeError(translate("Unable to write to sleep_memory."));
+                }
+                return mp_const_none;
+                #else
+                return MP_OBJ_NULL; // op not supported
+                #endif
+            } else {
+                // Read slice.
+                size_t len = slice.stop - slice.start;
+                uint8_t *items = m_new(uint8_t, len);
+                common_hal_alarm_sleep_memory_get_bytes(self, slice.start, items, len);
+                return mp_obj_new_bytearray_by_ref(len, items);
+            }
+#endif
+        } else {
+            // Single index rather than slice.
+            size_t index = mp_get_index(self->base.type, common_hal_alarm_sleep_memory_get_length(self),
+                    index_in, false);
+            if (value == MP_OBJ_SENTINEL) {
+                // load
+                uint8_t value_out;
+                common_hal_alarm_sleep_memory_get_bytes(self, index, &value_out, 1);
+                return MP_OBJ_NEW_SMALL_INT(value_out);
+            } else {
+                // store
+                mp_int_t byte_value = mp_obj_get_int(value);
+                if (byte_value > 0xff || byte_value < 0) {
+                    mp_raise_ValueError(translate("Bytes must be between 0 and 255."));
+                }
+                uint8_t short_value = byte_value;
+                if (!common_hal_alarm_sleep_memory_set_bytes(self, index, &short_value, 1)) {
+                    mp_raise_RuntimeError(translate("Unable to write to sleep_memory."));
+                }
+                return mp_const_none;
+            }
+        }
+    }
+}
+
+const mp_obj_type_t alarm_sleep_memory_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_SleepMemory,
+    .subscr = alarm_sleep_memory_subscr,
+    .print = NULL,
+    .locals_dict = (mp_obj_t)&alarm_sleep_memory_locals_dict,
+};
diff --git a/shared-bindings/alarm/SleepMemory.h b/shared-bindings/alarm/SleepMemory.h
new file mode 100644
index 000000000..e7a56521b
--- /dev/null
+++ b/shared-bindings/alarm/SleepMemory.h
@@ -0,0 +1,40 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_SLEEPMEMORY_H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_SLEEPMEMORY_H
+
+#include "common-hal/alarm/SleepMemory.h"
+
+extern const mp_obj_type_t alarm_sleep_memory_type;
+
+uint32_t common_hal_alarm_sleep_memory_get_length(alarm_sleep_memory_obj_t *self);
+
+bool common_hal_alarm_sleep_memory_set_bytes(alarm_sleep_memory_obj_t *self, uint32_t start_index, const uint8_t* values, uint32_t len);
+void common_hal_alarm_sleep_memory_get_bytes(alarm_sleep_memory_obj_t *self, uint32_t start_index, uint8_t* values, uint32_t len);
+
+#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_SLEEPMEMORY_H
diff --git a/shared-bindings/alarm/__init__.c b/shared-bindings/alarm/__init__.c
new file mode 100644
index 000000000..7023c70e5
--- /dev/null
+++ b/shared-bindings/alarm/__init__.c
@@ -0,0 +1,244 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Dan Halbert for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/obj.h"
+#include "py/reload.h"
+#include "py/runtime.h"
+
+#include "shared-bindings/alarm/__init__.h"
+#include "shared-bindings/alarm/SleepMemory.h"
+#include "shared-bindings/alarm/pin/PinAlarm.h"
+#include "shared-bindings/alarm/time/TimeAlarm.h"
+#include "shared-bindings/alarm/touch/TouchAlarm.h"
+#include "shared-bindings/supervisor/Runtime.h"
+#include "shared-bindings/time/__init__.h"
+#include "supervisor/shared/autoreload.h"
+#include "supervisor/shared/workflow.h"
+
+//| """Alarms and sleep
+//|
+//| Provides alarms that trigger based on time intervals or on external events, such as pin
+//| changes.
+//| The program can simply wait for these alarms, or go to sleep and be awoken when they trigger.
+//|
+//| There are two supported levels of sleep: light sleep and deep sleep.
+//|
+//| Light sleep keeps sufficient state so the program can resume after sleeping.
+//| It does not shut down WiFi, BLE, or other communications, or ongoing activities such
+//| as audio playback. It reduces power consumption to the extent possible that leaves
+//| these continuing activities running. In some cases there may be no decrease in power consumption.
+//|
+//| Deep sleep shuts down power to nearly all of the microcontroller including the CPU and RAM. This can save
+//| a more significant amount of power, but CircuitPython must restart ``code.py`` from the beginning when
+//| awakened.
+//|
+//| For both light sleep and deep sleep, if CircuitPython is connected to a host computer,
+//| maintaining the connection takes priority and power consumption may not be reduced.
+//| """
+
+//| sleep_memory: SleepMemory
+//| """Memory that persists during deep sleep.
+//| This object is the sole instance of `alarm.SleepMemory`."""
+//|
+
+//| wake_alarm: Alarm
+//| """The most recently triggered alarm. If CircuitPython was sleeping, the alarm the woke it from sleep."""
+//|
+
+// wake_alarm is implemented as a dictionary entry, so there's no code here.
+
+void validate_objs_are_alarms(size_t n_args, const mp_obj_t *objs) {
+    for (size_t i = 0; i < n_args; i++) {
+        if (MP_OBJ_IS_TYPE(objs[i], &alarm_pin_pinalarm_type) ||
+            MP_OBJ_IS_TYPE(objs[i], &alarm_time_timealarm_type) ||
+            MP_OBJ_IS_TYPE(objs[i], &alarm_touch_touchalarm_type)) {
+            continue;
+        }
+        mp_raise_TypeError_varg(translate("Expected an alarm"));
+    }
+}
+
+//| def light_sleep_until_alarms(*alarms: Alarm) -> Alarm:
+//|     """Go into a light sleep until awakened one of the alarms. The alarm causing the wake-up
+//|     is returned, and is also available as `alarm.wake_alarm`.
+//|
+//|     If no alarms are specified, return immediately.
+//|
+//|     **If CircuitPython is connected to a host computer, the connection will be maintained,
+//|     and the microcontroller may not actually go into a light sleep.**
+//|     This allows the user to interrupt an existing program with ctrl-C,
+//|     and to edit the files in CIRCUITPY, which would not be possible in true light sleep.
+//|     Thus, to use light sleep and save significant power,
+//      it may be necessary to disconnect from the host.
+//|     """
+//|     ...
+//|
+STATIC mp_obj_t alarm_light_sleep_until_alarms(size_t n_args, const mp_obj_t *args) {
+    if (n_args == 0) {
+        return mp_const_none;
+    }
+
+    validate_objs_are_alarms(n_args, args);
+
+    return common_hal_alarm_light_sleep_until_alarms(n_args, args);
+}
+MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(alarm_light_sleep_until_alarms_obj, 1, MP_OBJ_FUN_ARGS_MAX, alarm_light_sleep_until_alarms);
+
+//| def exit_and_deep_sleep_until_alarms(*alarms: Alarm) -> None:
+//|     """Exit the program and go into a deep sleep, until awakened by one of the alarms.
+//|     This function does not return.
+//|
+//|     When awakened, the microcontroller will restart and will run ``boot.py`` and ``code.py``
+//|     from the beginning.
+//|
+//|     After restart, an alarm *equivalent* to the one that caused the wake-up
+//|     will be available as `alarm.wake_alarm`.
+//|     Its type and/or attributes may not correspond exactly to the original alarm.
+//|     For time-base alarms, currently, an `alarm.time.TimeAlarm()` is created.
+//|
+//|     If no alarms are specified, the microcontroller will deep sleep until reset.
+//|
+//|     **If CircuitPython is connected to a host computer, the connection will be maintained,
+//|     and the system will not go into deep sleep.**
+//|     This allows the user to interrupt an existing program with ctrl-C,
+//|     and to edit the files in CIRCUITPY, which would not be possible in true deep sleep.
+//|     Thus, to use deep sleep and save significant power, you will need to disconnect from the host.
+//|
+//|     Here is skeletal example that deep-sleeps and restarts every 60 seconds:
+//|
+//|     .. code-block:: python
+//|
+//|         import alarm
+//|         import time
+//|
+//|         print("Waking up")
+//|
+//|         # Set an alarm for 60 seconds from now.
+//|         time_alarm = alarm.time.TimeAlarm(monotonic_time=time.monotonic() + 60)
+//|
+//|         # Deep sleep until the alarm goes off. Then restart the program.
+//|         alarm.exit_and_deep_sleep_until_alarms(time_alarm)
+//|     """
+//|     ...
+//|
+STATIC mp_obj_t alarm_exit_and_deep_sleep_until_alarms(size_t n_args, const mp_obj_t *args) {
+    validate_objs_are_alarms(n_args, args);
+
+    // Validate the alarms and set them.
+    common_hal_alarm_set_deep_sleep_alarms(n_args, args);
+
+    // Raise an exception, which will be processed in main.c.
+    mp_raise_arg1(&mp_type_DeepSleepRequest, NULL);
+
+    // Doesn't get here.
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(alarm_exit_and_deep_sleep_until_alarms_obj, 1, MP_OBJ_FUN_ARGS_MAX, alarm_exit_and_deep_sleep_until_alarms);
+
+STATIC const mp_map_elem_t alarm_pin_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_pin) },
+
+    { MP_ROM_QSTR(MP_QSTR_PinAlarm), MP_OBJ_FROM_PTR(&alarm_pin_pinalarm_type) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(alarm_pin_globals, alarm_pin_globals_table);
+
+STATIC const mp_obj_module_t alarm_pin_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&alarm_pin_globals,
+};
+
+STATIC const mp_map_elem_t alarm_time_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_time) },
+
+    { MP_ROM_QSTR(MP_QSTR_TimeAlarm), MP_OBJ_FROM_PTR(&alarm_time_timealarm_type) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(alarm_time_globals, alarm_time_globals_table);
+
+STATIC const mp_obj_module_t alarm_time_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&alarm_time_globals,
+};
+
+STATIC const mp_map_elem_t alarm_touch_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_touch) },
+    { MP_ROM_QSTR(MP_QSTR_TouchAlarm), MP_OBJ_FROM_PTR(&alarm_touch_touchalarm_type) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(alarm_touch_globals, alarm_touch_globals_table);
+
+STATIC const mp_obj_module_t alarm_touch_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&alarm_touch_globals,
+};
+
+// The module table is mutable because .wake_alarm is a mutable attribute.
+STATIC mp_map_elem_t alarm_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_alarm) },
+
+    // wake_alarm is a mutable attribute.
+    { MP_ROM_QSTR(MP_QSTR_wake_alarm), mp_const_none },
+
+    { MP_ROM_QSTR(MP_QSTR_light_sleep_until_alarms), MP_OBJ_FROM_PTR(&alarm_light_sleep_until_alarms_obj) },
+    { MP_ROM_QSTR(MP_QSTR_exit_and_deep_sleep_until_alarms),
+                                               MP_OBJ_FROM_PTR(&alarm_exit_and_deep_sleep_until_alarms_obj) },
+
+    { MP_ROM_QSTR(MP_QSTR_pin), MP_OBJ_FROM_PTR(&alarm_pin_module) },
+    { MP_ROM_QSTR(MP_QSTR_time), MP_OBJ_FROM_PTR(&alarm_time_module) },
+    { MP_ROM_QSTR(MP_QSTR_touch), MP_OBJ_FROM_PTR(&alarm_touch_module) },
+
+    { MP_ROM_QSTR(MP_QSTR_SleepMemory),   MP_OBJ_FROM_PTR(&alarm_sleep_memory_type) },
+    { MP_ROM_QSTR(MP_QSTR_sleep_memory),  MP_OBJ_FROM_PTR(&alarm_sleep_memory_obj) },
+};
+STATIC MP_DEFINE_MUTABLE_DICT(alarm_module_globals, alarm_module_globals_table);
+
+// Fetch value from module dict.
+mp_obj_t alarm_get_wake_alarm(void) {
+    mp_map_elem_t *elem =
+        mp_map_lookup(&alarm_module_globals.map, MP_ROM_QSTR(MP_QSTR_wake_alarm), MP_MAP_LOOKUP);
+    if (elem) {
+        return elem->value;
+    } else {
+        return NULL;
+    }
+}
+
+// Initialize .wake_alarm value.
+void alarm_save_wake_alarm(void) {
+    // Equivalent of:
+    // alarm.wake_alarm = alarm
+    mp_map_elem_t *elem =
+        mp_map_lookup(&alarm_module_globals.map, MP_ROM_QSTR(MP_QSTR_wake_alarm), MP_MAP_LOOKUP);
+    if (elem) {
+        elem->value = common_hal_alarm_get_wake_alarm();
+    }
+}
+
+const mp_obj_module_t alarm_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&alarm_module_globals,
+};
diff --git a/shared-bindings/alarm/__init__.h b/shared-bindings/alarm/__init__.h
new file mode 100644
index 000000000..154f91e26
--- /dev/null
+++ b/shared-bindings/alarm/__init__.h
@@ -0,0 +1,60 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Dan Halbert for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_ALARM___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_ALARM___INIT___H
+
+#include "py/obj.h"
+
+#include "common-hal/alarm/__init__.h"
+
+extern mp_obj_t common_hal_alarm_light_sleep_until_alarms(size_t n_alarms, const mp_obj_t *alarms);
+
+// Deep sleep is a two step process. Alarms are set when the VM is valid but
+// everything is reset before entering deep sleep. Furthermore, deep sleep may
+// not actually happen if the user is connected to the device. In this case, the
+// supervisor will idle using `port_wait_for_interrupt`. After each call, it will
+// call alarm_woken_from_sleep to see if we've been woken by an alarm and if so,
+// it will exit idle as if deep sleep was exited.
+extern void common_hal_alarm_set_deep_sleep_alarms(size_t n_alarms, const mp_obj_t *alarms);
+// Deep sleep is entered outside of the VM so we omit the `common_hal_` prefix.
+extern NORETURN void alarm_enter_deep_sleep(void);
+
+// Fetches value from module dict.
+extern mp_obj_t alarm_get_wake_alarm(void);
+
+extern void common_hal_alarm_gc_collect(void);
+extern mp_obj_t common_hal_alarm_get_wake_alarm(void);
+
+// Used by wake-up code.
+void alarm_save_wake_alarm(void);
+
+
+// True if an alarm is alerting. This is most useful for pretend deep sleep.
+extern bool alarm_woken_from_sleep(void);
+
+
+#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_ALARM___INIT___H
diff --git a/shared-bindings/alarm/pin/PinAlarm.c b/shared-bindings/alarm/pin/PinAlarm.c
new file mode 100644
index 000000000..89de016bc
--- /dev/null
+++ b/shared-bindings/alarm/pin/PinAlarm.c
@@ -0,0 +1,135 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Dan Halbert for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/board/__init__.h"
+#include "shared-bindings/microcontroller/__init__.h"
+#include "shared-bindings/microcontroller/Pin.h"
+#include "shared-bindings/alarm/pin/PinAlarm.h"
+
+#include "py/nlr.h"
+#include "py/obj.h"
+#include "py/objproperty.h"
+#include "py/runtime.h"
+#include "supervisor/shared/translate.h"
+
+//| class PinAlarm:
+//|     """Trigger an alarm when a pin changes state."""
+//|
+//|     def __init__(self, pin: microcontroller.Pin, value: bool, edge: bool = False, pull: bool = False) -> None:
+//|         """Create an alarm triggered by a `microcontroller.Pin` level. The alarm is not active
+//|         until it is passed to an `alarm`-enabling function, such as `alarm.light_sleep_until_alarms()` or
+//|         `alarm.exit_and_deep_sleep_until_alarms()`.
+//|
+//|         :param microcontroller.Pin pin: The pin to monitor. On some ports, the choice of pin
+//|           may be limited due to hardware restrictions, particularly for deep-sleep alarms.
+//|         :param bool value: When active, trigger when the pin value is high (``True``) or low (``False``).
+//|           On some ports, multiple `PinAlarm` objects may need to have coordinated values
+//|           for deep-sleep alarms.
+//|         :param bool edge: If ``True``, trigger only when there is a transition to the specified
+//|           value of ``value``. If ``True``, if the alarm becomes active when the pin value already
+//|           matches ``value``, the alarm is not triggered: the pin must transition from ``not value``
+//|           to ``value`` to trigger the alarm. On some ports, edge-triggering may not be available,
+//|           particularly for deep-sleep alarms.
+//|         :param bool pull: Enable a pull-up or pull-down which pulls the pin to the level opposite
+//|           that of ``value``. For instance, if ``value`` is set to ``True``, setting ``pull``
+//|           to ``True`` will enable a pull-down, to hold the pin low normally until an outside signal
+//|           pulls it high.
+//|         """
+//|         ...
+//|
+STATIC mp_obj_t alarm_pin_pinalarm_make_new(const mp_obj_type_t *type, mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    alarm_pin_pinalarm_obj_t *self = m_new_obj(alarm_pin_pinalarm_obj_t);
+    self->base.type = &alarm_pin_pinalarm_type;
+    enum { ARG_pin, ARG_value, ARG_edge, ARG_pull };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_pin, MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_value, MP_ARG_KW_ONLY | MP_ARG_REQUIRED | MP_ARG_BOOL },
+        { MP_QSTR_edge, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
+        { MP_QSTR_pull, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
+    };
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(0, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    mcu_pin_obj_t *pin = validate_obj_is_free_pin(args[ARG_pin].u_obj);
+
+    common_hal_alarm_pin_pinalarm_construct(self,
+        pin,
+        args[ARG_value].u_bool,
+        args[ARG_edge].u_bool,
+        args[ARG_pull].u_bool);
+
+    return MP_OBJ_FROM_PTR(self);
+}
+
+//|     pin: microcontroller.Pin
+//|     """The trigger pin."""
+//|
+STATIC mp_obj_t alarm_pin_pinalarm_obj_get_pin(mp_obj_t self_in) {
+    alarm_pin_pinalarm_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    mcu_pin_obj_t* pin = common_hal_alarm_pin_pinalarm_get_pin(self);
+    if (pin == NULL) {
+        return mp_const_none;
+    }
+    return MP_OBJ_FROM_PTR(pin);
+}
+MP_DEFINE_CONST_FUN_OBJ_1(alarm_pin_pinalarm_get_pin_obj, alarm_pin_pinalarm_obj_get_pin);
+
+const mp_obj_property_t alarm_pin_pinalarm_pin_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&alarm_pin_pinalarm_get_pin_obj,
+              (mp_obj_t)&mp_const_none_obj,
+              (mp_obj_t)&mp_const_none_obj},
+};
+
+//|     value: bool
+//|     """The value on which to trigger."""
+//|
+STATIC mp_obj_t alarm_pin_pinalarm_obj_get_value(mp_obj_t self_in) {
+    alarm_pin_pinalarm_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    return mp_obj_new_bool(common_hal_alarm_pin_pinalarm_get_value(self));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(alarm_pin_pinalarm_get_value_obj, alarm_pin_pinalarm_obj_get_value);
+
+const mp_obj_property_t alarm_pin_pinalarm_value_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&alarm_pin_pinalarm_get_value_obj,
+              (mp_obj_t)&mp_const_none_obj,
+              (mp_obj_t)&mp_const_none_obj},
+};
+
+STATIC const mp_rom_map_elem_t alarm_pin_pinalarm_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_pin), MP_ROM_PTR(&alarm_pin_pinalarm_pin_obj) },
+    { MP_ROM_QSTR(MP_QSTR_value), MP_ROM_PTR(&alarm_pin_pinalarm_value_obj) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(alarm_pin_pinalarm_locals_dict, alarm_pin_pinalarm_locals_dict_table);
+
+const mp_obj_type_t alarm_pin_pinalarm_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_PinAlarm,
+    .make_new = alarm_pin_pinalarm_make_new,
+    .locals_dict = (mp_obj_t)&alarm_pin_pinalarm_locals_dict,
+};
diff --git a/shared-bindings/alarm/pin/PinAlarm.h b/shared-bindings/alarm/pin/PinAlarm.h
new file mode 100644
index 000000000..48865009c
--- /dev/null
+++ b/shared-bindings/alarm/pin/PinAlarm.h
@@ -0,0 +1,43 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Dan Halbert for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_PIN_PINALARM_H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_PIN_PINALARM_H
+
+#include "py/obj.h"
+#include "py/objtuple.h"
+#include "common-hal/microcontroller/Pin.h"
+#include "common-hal/alarm/pin/PinAlarm.h"
+
+extern const mp_obj_type_t alarm_pin_pinalarm_type;
+
+void common_hal_alarm_pin_pinalarm_construct(alarm_pin_pinalarm_obj_t *self, mcu_pin_obj_t *pin, bool value, bool edge, bool pull);
+extern mcu_pin_obj_t *common_hal_alarm_pin_pinalarm_get_pin(alarm_pin_pinalarm_obj_t *self);
+extern bool common_hal_alarm_pin_pinalarm_get_value(alarm_pin_pinalarm_obj_t *self);
+extern bool common_hal_alarm_pin_pinalarm_get_edge(alarm_pin_pinalarm_obj_t *self);
+extern bool common_hal_alarm_pin_pinalarm_get_pull(alarm_pin_pinalarm_obj_t *self);
+
+#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_PIN_PINALARM_H
diff --git a/shared-bindings/alarm/time/TimeAlarm.c b/shared-bindings/alarm/time/TimeAlarm.c
new file mode 100644
index 000000000..1c9b8d37c
--- /dev/null
+++ b/shared-bindings/alarm/time/TimeAlarm.c
@@ -0,0 +1,143 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Dan Halbert for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/nlr.h"
+#include "py/obj.h"
+#include "py/objproperty.h"
+#include "py/runtime.h"
+
+#include "shared-bindings/time/__init__.h"
+#include "shared-bindings/alarm/time/TimeAlarm.h"
+
+#include "supervisor/shared/translate.h"
+
+#if MICROPY_LONGINT_IMPL != MICROPY_LONGINT_IMPL_NONE
+mp_obj_t MP_WEAK rtc_get_time_source_time(void) {
+    mp_raise_RuntimeError(translate("RTC is not supported on this board"));
+}
+#endif
+
+//| class TimeAlarm:
+//|     """Trigger an alarm when the specified time is reached."""
+//|
+//|     def __init__(self, monotonic_time: Optional[float] = None, epoch_time: Optional[int] = None) -> None:
+//|         """Create an alarm that will be triggered when `time.monotonic()` would equal
+//|         ``monotonic_time``, or when `time.time()` would equal ``epoch_time``.
+//|         Only one of the two arguments can be given.
+//|         The alarm is not active until it is passed to an
+//|         `alarm`-enabling function, such as `alarm.light_sleep_until_alarms()` or
+//|         `alarm.exit_and_deep_sleep_until_alarms()`.
+//|
+//|         If the given time is in the past when sleep occurs, the alarm will be triggered
+//|         immediately.
+//|         """
+//|         ...
+//|
+STATIC mp_obj_t alarm_time_timealarm_make_new(const mp_obj_type_t *type,
+        mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    alarm_time_timealarm_obj_t *self = m_new_obj(alarm_time_timealarm_obj_t);
+    self->base.type = &alarm_time_timealarm_type;
+
+    enum { ARG_monotonic_time, ARG_epoch_time };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_monotonic_time, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
+        { MP_QSTR_epoch_time, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
+    };
+
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    bool have_monotonic = args[ARG_monotonic_time].u_obj != mp_const_none;
+    bool have_epoch = args[ARG_epoch_time].u_obj != mp_const_none;
+
+    if (!(have_monotonic ^ have_epoch)) {
+        mp_raise_ValueError(translate("Supply one of monotonic_time or epoch_time"));
+    }
+
+    mp_float_t monotonic_time = 0;   // To avoid compiler warning.
+    if (have_monotonic) {
+        monotonic_time = mp_obj_get_float(args[ARG_monotonic_time].u_obj);
+    }
+
+    mp_float_t monotonic_time_now = common_hal_time_monotonic_ms() / 1000.0;
+
+    if (have_epoch) {
+#if MICROPY_LONGINT_IMPL == MICROPY_LONGINT_IMPL_NONE
+        mp_raise_ValueError(translate("epoch_time not supported on this board"));
+#else
+        mp_uint_t epoch_time_secs = mp_obj_int_get_checked(args[ARG_epoch_time].u_obj);
+
+        timeutils_struct_time_t tm;
+        struct_time_to_tm(rtc_get_time_source_time(), &tm);
+        mp_uint_t epoch_secs_now = timeutils_seconds_since_epoch(tm.tm_year, tm.tm_mon, tm.tm_mday,
+                                                       tm.tm_hour, tm.tm_min, tm.tm_sec);
+        // How far in the future (in secs) is the requested time?
+        mp_int_t epoch_diff = epoch_time_secs - epoch_secs_now;
+        // Convert it to a future monotonic time.
+        monotonic_time = monotonic_time_now + epoch_diff;
+#endif
+    }
+
+    if (monotonic_time < monotonic_time_now) {
+        mp_raise_ValueError(translate("Time is in the past."));
+    }
+
+    common_hal_alarm_time_timealarm_construct(self, monotonic_time);
+
+    return MP_OBJ_FROM_PTR(self);
+}
+
+//|     monotonic_time: float
+//|     """When this time is reached, the alarm will trigger, based on the `time.monotonic()` clock.
+//|        The time may be given as ``epoch_time`` in the constructor, but it is returned
+//|        by this property only as a `time.monotonic()` time.
+//|        """
+//|
+STATIC mp_obj_t alarm_time_timealarm_obj_get_monotonic_time(mp_obj_t self_in) {
+    alarm_time_timealarm_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    return mp_obj_new_float(common_hal_alarm_time_timealarm_get_monotonic_time(self));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(alarm_time_timealarm_get_monotonic_time_obj, alarm_time_timealarm_obj_get_monotonic_time);
+
+const mp_obj_property_t alarm_time_timealarm_monotonic_time_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&alarm_time_timealarm_get_monotonic_time_obj,
+              (mp_obj_t)&mp_const_none_obj,
+              (mp_obj_t)&mp_const_none_obj},
+};
+
+STATIC const mp_rom_map_elem_t alarm_time_timealarm_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_monotonic_time), MP_ROM_PTR(&alarm_time_timealarm_monotonic_time_obj) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(alarm_time_timealarm_locals_dict, alarm_time_timealarm_locals_dict_table);
+
+const mp_obj_type_t alarm_time_timealarm_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_TimeAlarm,
+    .make_new = alarm_time_timealarm_make_new,
+    .locals_dict = (mp_obj_t)&alarm_time_timealarm_locals_dict,
+};
diff --git a/shared-bindings/alarm/time/TimeAlarm.h b/shared-bindings/alarm/time/TimeAlarm.h
new file mode 100644
index 000000000..0a4b9caf4
--- /dev/null
+++ b/shared-bindings/alarm/time/TimeAlarm.h
@@ -0,0 +1,39 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Dan Halbert for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_TIME_TIMEALARM_H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_TIME_TIMEALARM_H
+
+#include "py/obj.h"
+
+#include "common-hal/alarm/time/TimeAlarm.h"
+
+extern const mp_obj_type_t alarm_time_timealarm_type;
+
+extern void common_hal_alarm_time_timealarm_construct(alarm_time_timealarm_obj_t *self, mp_float_t monotonic_time);
+extern mp_float_t common_hal_alarm_time_timealarm_get_monotonic_time(alarm_time_timealarm_obj_t *self);
+
+#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_TIME_TIMEALARM_H
diff --git a/shared-bindings/alarm/touch/TouchAlarm.c b/shared-bindings/alarm/touch/TouchAlarm.c
new file mode 100644
index 000000000..4259b71bd
--- /dev/null
+++ b/shared-bindings/alarm/touch/TouchAlarm.c
@@ -0,0 +1,91 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 microDev
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/alarm/touch/TouchAlarm.h"
+#include "shared-bindings/board/__init__.h"
+
+#include "py/objproperty.h"
+
+//| class TouchAlarm:
+//|     """Trigger an alarm when touch is detected."""
+//|
+//|     def __init__(self, *pin: microcontroller.Pin) -> None:
+//|         """Create an alarm that will be triggered when the given pin is touched.
+//|         The alarm is not active until it is passed to an `alarm`-enabling function, such as
+//|         `alarm.light_sleep_until_alarms()` or `alarm.exit_and_deep_sleep_until_alarms()`.
+//|
+//|         :param microcontroller.Pin pin: The pin to monitor. On some ports, the choice of pin
+//|           may be limited due to hardware restrictions, particularly for deep-sleep alarms.
+//|         """
+//|         ...
+//|
+STATIC mp_obj_t alarm_touch_touchalarm_make_new(const mp_obj_type_t *type,
+        mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    alarm_touch_touchalarm_obj_t *self = m_new_obj(alarm_touch_touchalarm_obj_t);
+    self->base.type = &alarm_touch_touchalarm_type;
+
+    enum { ARG_pin };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_pin, MP_ARG_REQUIRED | MP_ARG_OBJ },
+    };
+
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    const mcu_pin_obj_t *pin = validate_obj_is_free_pin(args[ARG_pin].u_obj);
+
+    common_hal_alarm_touch_touchalarm_construct(self, pin);
+
+    return MP_OBJ_FROM_PTR(self);
+}
+
+//|     pin: microcontroller.Pin
+//|     """The trigger pin."""
+//|
+STATIC mp_obj_t alarm_touch_touchalarm_obj_get_pin(mp_obj_t self_in) {
+    alarm_touch_touchalarm_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    return MP_OBJ_FROM_PTR(self->pin);
+}
+MP_DEFINE_CONST_FUN_OBJ_1(alarm_touch_touchalarm_get_pin_obj, alarm_touch_touchalarm_obj_get_pin);
+
+const mp_obj_property_t alarm_touch_touchalarm_pin_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&alarm_touch_touchalarm_get_pin_obj,
+              (mp_obj_t)&mp_const_none_obj,
+              (mp_obj_t)&mp_const_none_obj},
+};
+
+STATIC const mp_rom_map_elem_t alarm_touch_touchalarm_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_pin), MP_ROM_PTR(&alarm_touch_touchalarm_pin_obj) },
+};
+STATIC MP_DEFINE_CONST_DICT(alarm_touch_touchalarm_locals_dict, alarm_touch_touchalarm_locals_dict_table);
+
+const mp_obj_type_t alarm_touch_touchalarm_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_TouchAlarm,
+    .make_new = alarm_touch_touchalarm_make_new,
+    .locals_dict = (mp_obj_t)&alarm_touch_touchalarm_locals_dict,
+};
diff --git a/shared-bindings/alarm/touch/TouchAlarm.h b/shared-bindings/alarm/touch/TouchAlarm.h
new file mode 100644
index 000000000..1b70d4dae
--- /dev/null
+++ b/shared-bindings/alarm/touch/TouchAlarm.h
@@ -0,0 +1,40 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 microDev
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_TOUCH_TOUCHALARM_H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_TOUCH_TOUCHALARM_H
+
+#include "py/obj.h"
+#include "py/runtime.h"
+
+#include "common-hal/microcontroller/Pin.h"
+#include "common-hal/alarm/touch/TouchAlarm.h"
+
+extern const mp_obj_type_t alarm_touch_touchalarm_type;
+
+extern void common_hal_alarm_touch_touchalarm_construct(alarm_touch_touchalarm_obj_t *self, const mcu_pin_obj_t *pin);
+
+#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_TOUCH_TOUCHALARM_H
diff --git a/shared-bindings/audiopwmio/__init__.h b/shared-bindings/audiopwmio/__init__.h
index e4b7067d1..d7956d31e 100644
--- a/shared-bindings/audiopwmio/__init__.h
+++ b/shared-bindings/audiopwmio/__init__.h
@@ -24,11 +24,11 @@
  * THE SOFTWARE.
  */
 
-#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_AUDIOIO___INIT___H
-#define MICROPY_INCLUDED_SHARED_BINDINGS_AUDIOIO___INIT___H
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_AUDIOPWMIO___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_AUDIOPWMIO___INIT___H
 
 #include "py/obj.h"
 
 // Nothing now.
 
-#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_AUDIOIO___INIT___H
+#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_AUDIOPWMIO___INIT___H
diff --git a/shared-bindings/board/__init__.c b/shared-bindings/board/__init__.c
index 6837fc41c..717698408 100644
--- a/shared-bindings/board/__init__.c
+++ b/shared-bindings/board/__init__.c
@@ -28,6 +28,12 @@
 #include "py/runtime.h"
 
 #include "shared-bindings/board/__init__.h"
+#if BOARD_I2C
+#include "shared-bindings/busio/I2C.h"
+#endif
+#if BOARD_SPI
+#include "shared-bindings/busio/SPI.h"
+#endif
 
 //| """Board specific pin names
 //|
@@ -45,7 +51,7 @@
 #if BOARD_I2C
 mp_obj_t board_i2c(void) {
     mp_obj_t singleton = common_hal_board_get_i2c();
-    if (singleton != NULL) {
+    if (singleton != NULL && !common_hal_busio_i2c_deinited(singleton)) {
         return singleton;
     }
     assert_pin_free(DEFAULT_I2C_BUS_SDA);
@@ -69,7 +75,7 @@ MP_DEFINE_CONST_FUN_OBJ_0(board_i2c_obj, board_i2c);
 #if BOARD_SPI
 mp_obj_t board_spi(void) {
     mp_obj_t singleton = common_hal_board_get_spi();
-    if (singleton != NULL) {
+    if (singleton != NULL && !common_hal_busio_spi_deinited(singleton)) {
         return singleton;
     }
     assert_pin_free(DEFAULT_SPI_BUS_SCK);
diff --git a/shared-bindings/camera/ImageFormat.c b/shared-bindings/camera/ImageFormat.c
index d4bdddc56..9f2f9617f 100644
--- a/shared-bindings/camera/ImageFormat.c
+++ b/shared-bindings/camera/ImageFormat.c
@@ -38,7 +38,6 @@
 //|     RGB565: ImageFormat
 //|     """RGB565 format."""
 //|
-const mp_obj_type_t camera_imageformat_type;
 
 const camera_imageformat_obj_t camera_imageformat_jpg_obj = {
     { &camera_imageformat_type },
diff --git a/shared-bindings/camera/ImageFormat.h b/shared-bindings/camera/ImageFormat.h
index 8abc88438..32a36354f 100644
--- a/shared-bindings/camera/ImageFormat.h
+++ b/shared-bindings/camera/ImageFormat.h
@@ -35,7 +35,7 @@ typedef enum {
     IMAGEFORMAT_RGB565,
 } camera_imageformat_t;
 
-const mp_obj_type_t camera_imageformat_type;
+extern const mp_obj_type_t camera_imageformat_type;
 
 camera_imageformat_t camera_imageformat_obj_to_type(mp_obj_t obj);
 mp_obj_t camera_imageformat_type_to_obj(camera_imageformat_t mode);
diff --git a/shared-bindings/canio/CAN.c b/shared-bindings/canio/CAN.c
index 6dae36943..13066764e 100644
--- a/shared-bindings/canio/CAN.c
+++ b/shared-bindings/canio/CAN.c
@@ -49,7 +49,7 @@
 //|             loopback: bool = False,
 //|             silent: bool = False,
 //|             auto_restart: bool = False,
-//|         ):
+//|         ) -> None:
 //|         """A common shared-bus protocol.  The rx and tx pins are generally
 //|         connected to a transceiver which controls the H and L pins on a
 //|         shared bus.
@@ -171,7 +171,7 @@ STATIC const mp_obj_property_t canio_can_receive_error_count_obj = {
               (mp_obj_t)mp_const_none},
 };
 
-//|     state: State
+//|     state: BusState
 //|     """The current state of the bus. (read-only)"""
 STATIC mp_obj_t canio_can_state_get(mp_obj_t self_in) {
     canio_can_obj_t *self = MP_OBJ_TO_PTR(self_in);
@@ -214,7 +214,24 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(canio_can_restart_obj, canio_can_restart);
 //|
 //|         An empty filter list causes all messages to be accepted.
 //|
-//|         Timeout dictates how long receive() and next() will block."""
+//|         Timeout dictates how long receive() and next() will block.
+//|
+//|         Platform specific notes:
+//|
+//|         SAM E5x supports two Listeners.  Filter blocks are shared between the two
+//|         listeners.  There are 4 standard filter blocks and 4 extended filter blocks.
+//|         Each block can either match 2 single addresses or a mask of addresses.
+//|         The number of filter blocks can be increased, up to a hardware maximum, by
+//|         rebuilding CircuitPython, but this decreases the CircuitPython free
+//|         memory even if canio is not used.
+//|
+//|         STM32F405 supports two Listeners.  Filter blocks are shared between the two listeners.
+//|         There are 14 filter blocks.  Each block can match 2 standard addresses with
+//|         mask or 1 extended address with mask.
+//|
+//|         ESP32S2 supports one Listener.  There is a single filter block, which can either match a
+//|         standard address with mask or an extended address with mask.
+//|         """
 //|         ...
 //|
 STATIC mp_obj_t canio_can_listen(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
@@ -274,7 +291,7 @@ STATIC const mp_obj_property_t canio_can_loopback_obj = {
 };
 
 
-//|     def send(message: Union[RemoteTransmissionRequest, Message]) -> None:
+//|     def send(self, message: Union[RemoteTransmissionRequest, Message]) -> None:
 //|         """Send a message on the bus with the given data and id.
 //|         If the message could not be sent due to a full fifo or a bus error condition, RuntimeError is raised.
 //|         """
@@ -335,7 +352,7 @@ STATIC mp_obj_t canio_can_enter(mp_obj_t self_in) {
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(canio_can_enter_obj, canio_can_enter);
 
-//|     def __exit__(self, unused1, unused2, unused3) -> None:
+//|     def __exit__(self, unused1: Optional[Type[BaseException]], unused2: Optional[BaseException], unused3: Optional[TracebackType]) -> None:
 //|         """Calls deinit()"""
 //|         ...
 STATIC mp_obj_t canio_can_exit(size_t num_args, const mp_obj_t args[]) {
diff --git a/shared-bindings/canio/Listener.c b/shared-bindings/canio/Listener.c
index 93552af81..8a39f0f2a 100644
--- a/shared-bindings/canio/Listener.c
+++ b/shared-bindings/canio/Listener.c
@@ -123,7 +123,7 @@ STATIC mp_obj_t canio_listener_enter(mp_obj_t self_in) {
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(canio_listener_enter_obj, canio_listener_enter);
 
-//|     def __exit__(self, unused1, unused2, unused3) -> None:
+//|     def __exit__(self, unused1: Optional[Type[BaseException]], unused2: Optional[BaseException], unused3: Optional[TracebackType]) -> None:
 //|         """Calls deinit()"""
 //|         ...
 STATIC mp_obj_t canio_listener_exit(size_t num_args, const mp_obj_t args[]) {
diff --git a/shared-bindings/canio/Match.c b/shared-bindings/canio/Match.c
index 3fbc1773e..6039631fa 100644
--- a/shared-bindings/canio/Match.c
+++ b/shared-bindings/canio/Match.c
@@ -33,7 +33,7 @@
 //|     """Describe CAN bus messages to match"""
 //|
 //|
-//|     def __init__(self, id: int, *, mask: Optional[int] = None, extended: bool = False):
+//|     def __init__(self, id: int, *, mask: Optional[int] = None, extended: bool = False) -> None:
 //|         """Construct a Match with the given properties.
 //|
 //|         If mask is not None, then the filter is for any id which matches all
diff --git a/shared-bindings/canio/Message.c b/shared-bindings/canio/Message.c
index e47e997c7..04fa8fc6c 100644
--- a/shared-bindings/canio/Message.c
+++ b/shared-bindings/canio/Message.c
@@ -31,7 +31,7 @@
 #include "py/runtime.h"
 
 //| class Message:
-//|     def __init__(self, id: int, data: bytes, *, extended: bool = False):
+//|     def __init__(self, id: int, data: bytes, *, extended: bool = False) -> None:
 //|         """Construct a Message to send on a CAN bus.
 //|
 //|         :param int id: The numeric ID of the message
diff --git a/shared-bindings/canio/RemoteTransmissionRequest.c b/shared-bindings/canio/RemoteTransmissionRequest.c
index d762787b1..fcd259034 100644
--- a/shared-bindings/canio/RemoteTransmissionRequest.c
+++ b/shared-bindings/canio/RemoteTransmissionRequest.c
@@ -31,7 +31,7 @@
 #include "py/runtime.h"
 
 //| class RemoteTransmissionRequest:
-//|     def __init__(self, id: int, length: int, *, extended: bool = False):
+//|     def __init__(self, id: int, length: int, *, extended: bool = False) -> None:
 //|         """Construct a RemoteTransmissionRequest to send on a CAN bus.
 //|
 //|         :param int id: The numeric ID of the requested message
diff --git a/shared-bindings/displayio/Bitmap.c b/shared-bindings/displayio/Bitmap.c
index 5a2fc785f..b9f06fe14 100644
--- a/shared-bindings/displayio/Bitmap.c
+++ b/shared-bindings/displayio/Bitmap.c
@@ -172,7 +172,7 @@ STATIC mp_obj_t bitmap_subscr(mp_obj_t self_in, mp_obj_t index_obj, mp_obj_t val
     return mp_const_none;
 }
 
-//|     def blit(self, x: int, y: int, source_bitmap: bitmap, *, x1: int, y1: int, x2: int, y2: int, skip_index: int) -> None:
+//|     def blit(self, x: int, y: int, source_bitmap: Bitmap, *, x1: int, y1: int, x2: int, y2: int, skip_index: int) -> None:
 //|         """Inserts the source_bitmap region defined by rectangular boundaries
 //|                     (x1,y1) and (x2,y2) into the bitmap at the specified (x,y) location.
 //|
@@ -274,7 +274,7 @@ STATIC mp_obj_t displayio_bitmap_obj_blit(size_t n_args, const mp_obj_t *pos_arg
 MP_DEFINE_CONST_FUN_OBJ_KW(displayio_bitmap_blit_obj, 4, displayio_bitmap_obj_blit);
 // `displayio_bitmap_obj_blit` requires at least 4 arguments
 
-//|     def fill(self, value: Any) -> None:
+//|     def fill(self, value: int) -> None:
 //|         """Fills the bitmap with the supplied palette index value."""
 //|         ...
 //|
diff --git a/shared-bindings/displayio/ColorConverter.c b/shared-bindings/displayio/ColorConverter.c
index 0e6e9bfd9..88d3a1ba8 100644
--- a/shared-bindings/displayio/ColorConverter.c
+++ b/shared-bindings/displayio/ColorConverter.c
@@ -116,7 +116,7 @@ const mp_obj_property_t displayio_colorconverter_dither_obj = {
 STATIC mp_obj_t displayio_colorconverter_make_transparent(mp_obj_t self_in, mp_obj_t transparent_color_obj) {
     displayio_colorconverter_t *self = MP_OBJ_TO_PTR(self_in);
 
-    mp_int_t transparent_color = mp_obj_get_int(&transparent_color);
+    mp_int_t transparent_color = mp_obj_get_int(transparent_color_obj);
     common_hal_displayio_colorconverter_make_transparent(self, transparent_color);
     return mp_const_none;
 }
@@ -128,7 +128,7 @@ MP_DEFINE_CONST_FUN_OBJ_2(displayio_colorconverter_make_transparent_obj, display
 STATIC mp_obj_t displayio_colorconverter_make_opaque(mp_obj_t self_in, mp_obj_t transparent_color_obj) {
     displayio_colorconverter_t *self = MP_OBJ_TO_PTR(self_in);
 
-    mp_int_t transparent_color = mp_obj_get_int(&transparent_color);
+    mp_int_t transparent_color = mp_obj_get_int(transparent_color_obj);
     common_hal_displayio_colorconverter_make_opaque(self, transparent_color);
     return mp_const_none;
 }
diff --git a/shared-bindings/displayio/Display.c b/shared-bindings/displayio/Display.c
index e78a893b0..8d1a888fe 100644
--- a/shared-bindings/displayio/Display.c
+++ b/shared-bindings/displayio/Display.c
@@ -39,7 +39,7 @@
 #include "shared-module/displayio/__init__.h"
 #include "supervisor/shared/translate.h"
 
-//| _DisplayBus = Union[FourWire, ParallelBus, I2CDisplay]
+//| _DisplayBus = Union['FourWire', 'ParallelBus', 'I2CDisplay']
 //| """:py:class:`FourWire`, :py:class:`ParallelBus` or :py:class:`I2CDisplay`"""
 //|
 
@@ -58,24 +58,26 @@
 //|         r"""Create a Display object on the given display bus (`FourWire`, `ParallelBus` or `I2CDisplay`).
 //|
 //|         The ``init_sequence`` is bitpacked to minimize the ram impact. Every command begins with a
-//|         command byte followed by a byte to determine the parameter count and if a delay is need after.
-//|         When the top bit of the second byte is 1, the next byte will be the delay time in milliseconds.
-//|         The remaining 7 bits are the parameter count excluding any delay byte. The third through final
-//|         bytes are the remaining command parameters. The next byte will begin a new command definition.
-//|         Here is a portion of ILI9341 init code:
+//|         command byte followed by a byte to determine the parameter count and delay. When the top bit
+//|         of the second byte is 1 (0x80), a delay will occur after the command parameters are sent.
+//|         The remaining 7 bits are the parameter count excluding any delay byte. The bytes following
+//|         are the parameters. When the delay bit is set, a single byte after the parameters specifies
+//|         the delay duration in milliseconds. The value 0xff will lead to an extra long 500 ms delay
+//|         instead of 255 ms. The next byte will begin a new command definition.
+//|         Here is an example:
 //|
 //|         .. code-block:: python
 //|
 //|           init_sequence = (b"\xe1\x0f\x00\x0E\x14\x03\x11\x07\x31\xC1\x48\x08\x0F\x0C\x31\x36\x0F" # Set Gamma
 //|                            b"\x11\x80\x78"# Exit Sleep then delay 0x78 (120ms)
-//|                            b"\x29\x80\x78"# Display on then delay 0x78 (120ms)
+//|                            b"\x29\x81\xaa\x78"# Display on then delay 0x78 (120ms)
 //|                           )
 //|            display = displayio.Display(display_bus, init_sequence, width=320, height=240)
 //|
-//|         The first command is 0xe1 with 15 (0xf) parameters following. The second and third are 0x11 and
-//|         0x29 respectively with delays (0x80) of 120ms (0x78) and no parameters. Multiple byte literals
-//|         (b"") are merged together on load. The parens are needed to allow byte literals on subsequent
-//|         lines.
+//|         The first command is 0xe1 with 15 (0xf) parameters following. The second is 0x11 with 0
+//|         parameters and a 120ms (0x78) delay. The third command is 0x29 with one parameter 0xaa and a
+//|         120ms delay (0x78). Multiple byte literals (b"") are merged together on load. The parens
+//|         are needed to allow byte literals on subsequent lines.
 //|
 //|         The initialization sequence should always leave the display memory access inline with the scan
 //|         of the display to minimize tearing artifacts.
diff --git a/shared-bindings/displayio/EPaperDisplay.c b/shared-bindings/displayio/EPaperDisplay.c
index 8be4ee4c4..4f5c47aca 100644
--- a/shared-bindings/displayio/EPaperDisplay.c
+++ b/shared-bindings/displayio/EPaperDisplay.c
@@ -49,15 +49,28 @@
 //|     Most people should not use this class directly. Use a specific display driver instead that will
 //|     contain the startup and shutdown sequences at minimum."""
 //|
-//|     def __init__(self, display_bus: _DisplayBus, start_sequence: ReadableBuffer, stop_sequence: ReadableBuffer, *, width: int, height: int, ram_width: int, ram_height: int, colstart: int = 0, rowstart: int = 0, rotation: int = 0, set_column_window_command: Optional[int] = None, set_row_window_command: Optional[int] = None, single_byte_bounds: bool = False, write_black_ram_command: int, black_bits_inverted: bool = False, write_color_ram_command: Optional[int] = None, color_bits_inverted: bool = False, highlight_color: int = 0x000000, refresh_display_command: int, refresh_time: float = 40, busy_pin: Optional[microcontroller.Pin] = None, busy_state: bool = True, seconds_per_frame: float = 180, always_toggle_chip_select: bool = False) -> None:
+//|     def __init__(self, display_bus: _DisplayBus,
+//|                  start_sequence: ReadableBuffer, stop_sequence: ReadableBuffer, *,
+//|                  width: int, height: int, ram_width: int, ram_height: int,
+//|                  colstart: int = 0, rowstart: int = 0, rotation: int = 0,
+//|                  set_column_window_command: Optional[int] = None,
+//|                  set_row_window_command: Optional[int] = None, single_byte_bounds: bool = False,
+//|                  write_black_ram_command: int, black_bits_inverted: bool = False,
+//|                  write_color_ram_command: Optional[int] = None,
+//|                  color_bits_inverted: bool = False, highlight_color: int = 0x000000,
+//|                  refresh_display_command: int, refresh_time: float = 40,
+//|                  busy_pin: Optional[microcontroller.Pin] = None, busy_state: bool = True,
+//|                  seconds_per_frame: float = 180, always_toggle_chip_select: bool = False,
+//|                  grayscale: bool = False) -> None:
 //|         """Create a EPaperDisplay object on the given display bus (`displayio.FourWire` or `displayio.ParallelBus`).
 //|
 //|         The ``start_sequence`` and ``stop_sequence`` are bitpacked to minimize the ram impact. Every
-//|         command begins with a command byte followed by a byte to determine the parameter count and if
-//|         a delay is need after. When the top bit of the second byte is 1, the next byte will be the
-//|         delay time in milliseconds. The remaining 7 bits are the parameter count excluding any delay
-//|         byte. The third through final bytes are the remaining command parameters. The next byte will
-//|         begin a new command definition.
+//|         command begins with a command byte followed by a byte to determine the parameter count and
+//|         delay. When the top bit of the second byte is 1 (0x80), a delay will occur after the command
+//|         parameters are sent. The remaining 7 bits are the parameter count excluding any delay
+//|         byte. The bytes following are the parameters. When the delay bit is set, a single byte after
+//|         the parameters specifies the delay duration in milliseconds. The value 0xff will lead to an
+//|         extra long 500 ms delay instead of 255 ms. The next byte will begin a new command definition.
 //|
 //|         :param display_bus: The bus that the display is connected to
 //|         :type _DisplayBus: displayio.FourWire or displayio.ParallelBus
@@ -84,11 +97,18 @@
 //|         :param microcontroller.Pin busy_pin: Pin used to signify the display is busy
 //|         :param bool busy_state: State of the busy pin when the display is busy
 //|         :param float seconds_per_frame: Minimum number of seconds between screen refreshes
-//|         :param bool always_toggle_chip_select: When True, chip select is toggled every byte"""
+//|         :param bool always_toggle_chip_select: When True, chip select is toggled every byte
+//|         :param bool grayscale: When true, the color ram is the low bit of 2-bit grayscale"""
 //|         ...
 //|
 STATIC mp_obj_t displayio_epaperdisplay_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
-    enum { ARG_display_bus, ARG_start_sequence, ARG_stop_sequence, ARG_width, ARG_height, ARG_ram_width, ARG_ram_height, ARG_colstart, ARG_rowstart, ARG_rotation, ARG_set_column_window_command, ARG_set_row_window_command, ARG_set_current_column_command, ARG_set_current_row_command, ARG_write_black_ram_command, ARG_black_bits_inverted, ARG_write_color_ram_command, ARG_color_bits_inverted, ARG_highlight_color, ARG_refresh_display_command,  ARG_refresh_time, ARG_busy_pin, ARG_busy_state, ARG_seconds_per_frame, ARG_always_toggle_chip_select };
+    enum { ARG_display_bus, ARG_start_sequence, ARG_stop_sequence, ARG_width, ARG_height,
+           ARG_ram_width, ARG_ram_height, ARG_colstart, ARG_rowstart, ARG_rotation,
+           ARG_set_column_window_command, ARG_set_row_window_command, ARG_set_current_column_command,
+           ARG_set_current_row_command, ARG_write_black_ram_command, ARG_black_bits_inverted,
+           ARG_write_color_ram_command, ARG_color_bits_inverted, ARG_highlight_color,
+           ARG_refresh_display_command,  ARG_refresh_time, ARG_busy_pin, ARG_busy_state,
+           ARG_seconds_per_frame, ARG_always_toggle_chip_select, ARG_grayscale };
     static const mp_arg_t allowed_args[] = {
         { MP_QSTR_display_bus, MP_ARG_REQUIRED | MP_ARG_OBJ },
         { MP_QSTR_start_sequence, MP_ARG_REQUIRED | MP_ARG_OBJ },
@@ -115,6 +135,7 @@ STATIC mp_obj_t displayio_epaperdisplay_make_new(const mp_obj_type_t *type, size
         { MP_QSTR_busy_state, MP_ARG_BOOL | MP_ARG_KW_ONLY, {.u_bool = true} },
         { MP_QSTR_seconds_per_frame, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_obj = MP_OBJ_NEW_SMALL_INT(180)} },
         { MP_QSTR_always_toggle_chip_select, MP_ARG_BOOL | MP_ARG_KW_ONLY, {.u_bool = false} },
+        { MP_QSTR_grayscale, MP_ARG_BOOL | MP_ARG_KW_ONLY, {.u_bool = false} },
     };
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
@@ -151,11 +172,14 @@ STATIC mp_obj_t displayio_epaperdisplay_make_new(const mp_obj_type_t *type, size
         self,
         display_bus,
         start_bufinfo.buf, start_bufinfo.len, stop_bufinfo.buf, stop_bufinfo.len,
-        args[ARG_width].u_int, args[ARG_height].u_int, args[ARG_ram_width].u_int, args[ARG_ram_height].u_int, args[ARG_colstart].u_int, args[ARG_rowstart].u_int, rotation,
+        args[ARG_width].u_int, args[ARG_height].u_int, args[ARG_ram_width].u_int, args[ARG_ram_height].u_int,
+        args[ARG_colstart].u_int, args[ARG_rowstart].u_int, rotation,
         args[ARG_set_column_window_command].u_int, args[ARG_set_row_window_command].u_int,
         args[ARG_set_current_column_command].u_int, args[ARG_set_current_row_command].u_int,
-        args[ARG_write_black_ram_command].u_int, args[ARG_black_bits_inverted].u_bool, write_color_ram_command, args[ARG_color_bits_inverted].u_bool, highlight_color, args[ARG_refresh_display_command].u_int, refresh_time,
-        busy_pin, args[ARG_busy_state].u_bool, seconds_per_frame, args[ARG_always_toggle_chip_select].u_bool
+        args[ARG_write_black_ram_command].u_int, args[ARG_black_bits_inverted].u_bool, write_color_ram_command,
+        args[ARG_color_bits_inverted].u_bool, highlight_color, args[ARG_refresh_display_command].u_int, refresh_time,
+        busy_pin, args[ARG_busy_state].u_bool, seconds_per_frame,
+        args[ARG_always_toggle_chip_select].u_bool, args[ARG_grayscale].u_bool
         );
 
     return self;
@@ -221,6 +245,23 @@ const mp_obj_property_t displayio_epaperdisplay_time_to_refresh_obj = {
               (mp_obj_t)&mp_const_none_obj},
 };
 
+//|     busy: bool
+//|     """True when the display is refreshing. This uses the ``busy_pin`` when available or the
+//|        ``refresh_time`` otherwise."""
+//|
+STATIC mp_obj_t displayio_epaperdisplay_obj_get_busy(mp_obj_t self_in) {
+    displayio_epaperdisplay_obj_t *self = native_display(self_in);
+    return mp_obj_new_bool(common_hal_displayio_epaperdisplay_get_busy(self));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(displayio_epaperdisplay_get_busy_obj, displayio_epaperdisplay_obj_get_busy);
+
+const mp_obj_property_t displayio_epaperdisplay_busy_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&displayio_epaperdisplay_get_busy_obj,
+              (mp_obj_t)&mp_const_none_obj,
+              (mp_obj_t)&mp_const_none_obj},
+};
+
 //|     width: int
 //|     """Gets the width of the display in pixels"""
 //|
@@ -253,6 +294,29 @@ const mp_obj_property_t displayio_epaperdisplay_height_obj = {
               (mp_obj_t)&mp_const_none_obj},
 };
 
+//|     rotation: int
+//|     """The rotation of the display as an int in degrees."""
+//|
+STATIC mp_obj_t displayio_epaperdisplay_obj_get_rotation(mp_obj_t self_in) {
+    displayio_epaperdisplay_obj_t *self = native_display(self_in);
+    return MP_OBJ_NEW_SMALL_INT(common_hal_displayio_epaperdisplay_get_rotation(self));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(displayio_epaperdisplay_get_rotation_obj, displayio_epaperdisplay_obj_get_rotation);
+STATIC mp_obj_t displayio_epaperdisplay_obj_set_rotation(mp_obj_t self_in, mp_obj_t value) {
+    displayio_epaperdisplay_obj_t *self = native_display(self_in);
+    common_hal_displayio_epaperdisplay_set_rotation(self, mp_obj_get_int(value));
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_2(displayio_epaperdisplay_set_rotation_obj, displayio_epaperdisplay_obj_set_rotation);
+
+
+const mp_obj_property_t displayio_epaperdisplay_rotation_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&displayio_epaperdisplay_get_rotation_obj,
+              (mp_obj_t)&displayio_epaperdisplay_set_rotation_obj,
+              (mp_obj_t)&mp_const_none_obj},
+};
+
 //|     bus: _DisplayBus
 //|     """The bus being used by the display"""
 //|
@@ -276,7 +340,9 @@ STATIC const mp_rom_map_elem_t displayio_epaperdisplay_locals_dict_table[] = {
 
     { MP_ROM_QSTR(MP_QSTR_width), MP_ROM_PTR(&displayio_epaperdisplay_width_obj) },
     { MP_ROM_QSTR(MP_QSTR_height), MP_ROM_PTR(&displayio_epaperdisplay_height_obj) },
+    { MP_ROM_QSTR(MP_QSTR_rotation), MP_ROM_PTR(&displayio_epaperdisplay_rotation_obj) },
     { MP_ROM_QSTR(MP_QSTR_bus), MP_ROM_PTR(&displayio_epaperdisplay_bus_obj) },
+    { MP_ROM_QSTR(MP_QSTR_busy), MP_ROM_PTR(&displayio_epaperdisplay_busy_obj) },
     { MP_ROM_QSTR(MP_QSTR_time_to_refresh), MP_ROM_PTR(&displayio_epaperdisplay_time_to_refresh_obj) },
 };
 STATIC MP_DEFINE_CONST_DICT(displayio_epaperdisplay_locals_dict, displayio_epaperdisplay_locals_dict_table);
diff --git a/shared-bindings/displayio/EPaperDisplay.h b/shared-bindings/displayio/EPaperDisplay.h
index e4b81c883..14d4f6aa9 100644
--- a/shared-bindings/displayio/EPaperDisplay.h
+++ b/shared-bindings/displayio/EPaperDisplay.h
@@ -39,12 +39,12 @@ extern const mp_obj_type_t displayio_epaperdisplay_type;
 #define NO_COMMAND 0x100
 
 void common_hal_displayio_epaperdisplay_construct(displayio_epaperdisplay_obj_t* self,
-        mp_obj_t bus, uint8_t* start_sequence, uint16_t start_sequence_len, uint8_t* stop_sequence, uint16_t stop_sequence_len,
+        mp_obj_t bus, const uint8_t* start_sequence, uint16_t start_sequence_len, const uint8_t* stop_sequence, uint16_t stop_sequence_len,
         uint16_t width, uint16_t height, uint16_t ram_width, uint16_t ram_height, int16_t colstart, int16_t rowstart, uint16_t rotation,
         uint16_t set_column_window_command, uint16_t set_row_window_command,
         uint16_t set_current_column_command, uint16_t set_current_row_command,
         uint16_t write_black_ram_command, bool black_bits_inverted, uint16_t write_color_ram_command, bool color_bits_inverted, uint32_t highlight_color, uint16_t refresh_display_command, mp_float_t refresh_time,
-        const mcu_pin_obj_t* busy_pin, bool busy_state, mp_float_t seconds_per_frame, bool always_toggle_chip_select);
+        const mcu_pin_obj_t* busy_pin, bool busy_state, mp_float_t seconds_per_frame, bool always_toggle_chip_select, bool grayscale);
 
 bool common_hal_displayio_epaperdisplay_refresh(displayio_epaperdisplay_obj_t* self);
 
@@ -52,9 +52,12 @@ bool common_hal_displayio_epaperdisplay_show(displayio_epaperdisplay_obj_t* self
 
 // Returns time in milliseconds.
 uint32_t common_hal_displayio_epaperdisplay_get_time_to_refresh(displayio_epaperdisplay_obj_t* self);
+bool common_hal_displayio_epaperdisplay_get_busy(displayio_epaperdisplay_obj_t* self);
 
 uint16_t common_hal_displayio_epaperdisplay_get_width(displayio_epaperdisplay_obj_t* self);
 uint16_t common_hal_displayio_epaperdisplay_get_height(displayio_epaperdisplay_obj_t* self);
+uint16_t common_hal_displayio_epaperdisplay_get_rotation(displayio_epaperdisplay_obj_t* self);
+void common_hal_displayio_epaperdisplay_set_rotation(displayio_epaperdisplay_obj_t* self, int rotation);
 
 mp_obj_t common_hal_displayio_epaperdisplay_get_bus(displayio_epaperdisplay_obj_t* self);
 
diff --git a/shared-bindings/displayio/FourWire.h b/shared-bindings/displayio/FourWire.h
index ac186d2c3..6f6b528e7 100644
--- a/shared-bindings/displayio/FourWire.h
+++ b/shared-bindings/displayio/FourWire.h
@@ -48,7 +48,8 @@ bool common_hal_displayio_fourwire_bus_free(mp_obj_t self);
 
 bool common_hal_displayio_fourwire_begin_transaction(mp_obj_t self);
 
-void common_hal_displayio_fourwire_send(mp_obj_t self, display_byte_type_t byte_type, display_chip_select_behavior_t chip_select, uint8_t *data, uint32_t data_length);
+void common_hal_displayio_fourwire_send(mp_obj_t self, display_byte_type_t byte_type,
+    display_chip_select_behavior_t chip_select, const uint8_t *data, uint32_t data_length);
 
 void common_hal_displayio_fourwire_end_transaction(mp_obj_t self);
 
diff --git a/shared-bindings/displayio/I2CDisplay.h b/shared-bindings/displayio/I2CDisplay.h
index bae53c491..37520202e 100644
--- a/shared-bindings/displayio/I2CDisplay.h
+++ b/shared-bindings/displayio/I2CDisplay.h
@@ -44,7 +44,8 @@ bool common_hal_displayio_i2cdisplay_bus_free(mp_obj_t self);
 
 bool common_hal_displayio_i2cdisplay_begin_transaction(mp_obj_t self);
 
-void common_hal_displayio_i2cdisplay_send(mp_obj_t self, display_byte_type_t byte_type, display_chip_select_behavior_t chip_select, uint8_t *data, uint32_t data_length);
+void common_hal_displayio_i2cdisplay_send(mp_obj_t self, display_byte_type_t byte_type,
+    display_chip_select_behavior_t chip_select, const uint8_t *data, uint32_t data_length);
 
 void common_hal_displayio_i2cdisplay_end_transaction(mp_obj_t self);
 
diff --git a/shared-bindings/displayio/ParallelBus.h b/shared-bindings/displayio/ParallelBus.h
index be2aef7d4..1e74e3a0a 100644
--- a/shared-bindings/displayio/ParallelBus.h
+++ b/shared-bindings/displayio/ParallelBus.h
@@ -46,7 +46,8 @@ bool common_hal_displayio_parallelbus_bus_free(mp_obj_t self);
 
 bool common_hal_displayio_parallelbus_begin_transaction(mp_obj_t self);
 
-void common_hal_displayio_parallelbus_send(mp_obj_t self, display_byte_type_t byte_type, display_chip_select_behavior_t chip_select, uint8_t *data, uint32_t data_length);
+void common_hal_displayio_parallelbus_send(mp_obj_t self, display_byte_type_t byte_type,
+    display_chip_select_behavior_t chip_select, const uint8_t *data, uint32_t data_length);
 
 void common_hal_displayio_parallelbus_end_transaction(mp_obj_t self);
 
diff --git a/shared-bindings/displayio/__init__.h b/shared-bindings/displayio/__init__.h
index a7748d029..4fc666c59 100644
--- a/shared-bindings/displayio/__init__.h
+++ b/shared-bindings/displayio/__init__.h
@@ -42,7 +42,8 @@ typedef enum {
 typedef bool (*display_bus_bus_reset)(mp_obj_t bus);
 typedef bool (*display_bus_bus_free)(mp_obj_t bus);
 typedef bool (*display_bus_begin_transaction)(mp_obj_t bus);
-typedef void (*display_bus_send)(mp_obj_t bus, display_byte_type_t byte_type, display_chip_select_behavior_t chip_select, uint8_t *data, uint32_t data_length);
+typedef void (*display_bus_send)(mp_obj_t bus, display_byte_type_t byte_type,
+    display_chip_select_behavior_t chip_select, const uint8_t *data, uint32_t data_length);
 typedef void (*display_bus_end_transaction)(mp_obj_t bus);
 
 void common_hal_displayio_release_displays(void);
diff --git a/shared-bindings/dualbank/__init__.c b/shared-bindings/dualbank/__init__.c
new file mode 100644
index 000000000..8021ab18b
--- /dev/null
+++ b/shared-bindings/dualbank/__init__.c
@@ -0,0 +1,115 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 microDev
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/dualbank/__init__.h"
+
+//| """DUALBANK Module
+//|
+//| The `dualbank` module adds ability to update and switch
+//| between the two app partitions.
+//|
+//| There are two identical partitions, these contain different
+//| firmware versions.
+//| Having two partitions enables rollback functionality.
+//|
+//| The two partitions are defined as boot partition and
+//| next-update partition. Calling `dualbank.flash()` writes
+//| the next-update partition.
+//|
+//| After the next-update partition is written a validation
+//| check is performed and on a successful validation this
+//| partition is set as the boot partition. On next reset,
+//| firmware will be loaded from this partition.
+//|
+//| Here is the sequence of commands to follow:
+//|
+//| .. code-block:: python
+//|
+//|     import dualbank
+//|
+//|     dualbank.flash(buffer, offset)
+//|     dualbank.switch()
+//| """
+//| ...
+//|
+
+//| def flash(*buffer: ReadableBuffer, offset: int=0) -> None:
+//|     """Writes one of two app partitions at the given offset.
+//|
+//|     This can be called multiple times when flashing the firmware
+//|     in small chunks.
+//|     """
+//|     ...
+//|
+STATIC mp_obj_t dualbank_flash(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    enum { ARG_buffer, ARG_offset };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_buffer, MP_ARG_OBJ | MP_ARG_REQUIRED },
+        { MP_QSTR_offset, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 0} },
+    };
+
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    if (args[ARG_offset].u_int < 0) {
+        mp_raise_ValueError(translate("offset must be >= 0"));
+    }
+
+    mp_buffer_info_t bufinfo;
+    mp_get_buffer_raise(args[ARG_buffer].u_obj, &bufinfo, MP_BUFFER_READ);
+
+    common_hal_dualbank_flash(bufinfo.buf, bufinfo.len, args[ARG_offset].u_int);
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_KW(dualbank_flash_obj, 0, dualbank_flash);
+
+//| def switch() -> None:
+//|     """Switches the boot partition.
+//|
+//|     On next reset, firmware will be loaded from the partition
+//|     just switched over to.
+//|     """
+//|     ...
+//|
+STATIC mp_obj_t dualbank_switch(void) {
+    common_hal_dualbank_switch();
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(dualbank_switch_obj, dualbank_switch);
+
+STATIC const mp_rom_map_elem_t dualbank_module_globals_table[] = {
+    // module name
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_dualbank) },
+    // module functions
+    { MP_ROM_QSTR(MP_QSTR_flash), MP_ROM_PTR(&dualbank_flash_obj) },
+    { MP_ROM_QSTR(MP_QSTR_switch), MP_ROM_PTR(&dualbank_switch_obj) },
+};
+STATIC MP_DEFINE_CONST_DICT(dualbank_module_globals, dualbank_module_globals_table);
+
+const mp_obj_module_t dualbank_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&dualbank_module_globals,
+};
diff --git a/shared-bindings/dualbank/__init__.h b/shared-bindings/dualbank/__init__.h
new file mode 100644
index 000000000..7edbc6d68
--- /dev/null
+++ b/shared-bindings/dualbank/__init__.h
@@ -0,0 +1,35 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 microDev
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_DUALBANK___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_DUALBANK___INIT___H
+
+#include "py/runtime.h"
+
+extern void common_hal_dualbank_switch(void);
+extern void common_hal_dualbank_flash(const void *buf, const size_t len, const size_t offset);
+
+#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_DUALBANK___INIT___H
diff --git a/shared-bindings/i2cperipheral/I2CPeripheral.c b/shared-bindings/i2cperipheral/I2CPeripheral.c
index b5ac861b4..b5c268eb5 100644
--- a/shared-bindings/i2cperipheral/I2CPeripheral.c
+++ b/shared-bindings/i2cperipheral/I2CPeripheral.c
@@ -166,7 +166,7 @@ STATIC mp_obj_t i2cperipheral_i2c_peripheral_request(size_t n_args, const mp_obj
     if (timeout_ms == 0) {
         forever = true;
     } else if (timeout_ms > 0) {
-        timeout_end = common_hal_time_monotonic() + timeout_ms;
+        timeout_end = common_hal_time_monotonic_ms() + timeout_ms;
     }
 
     int last_error = 0;
@@ -200,7 +200,7 @@ STATIC mp_obj_t i2cperipheral_i2c_peripheral_request(size_t n_args, const mp_obj
         }
 
         return mp_obj_new_i2cperipheral_i2c_peripheral_request(self, address, is_read, is_restart);
-    } while (forever || common_hal_time_monotonic() < timeout_end);
+    } while (forever || common_hal_time_monotonic_ms() < timeout_end);
 
     if (timeout_ms > 0) {
         mp_raise_OSError(MP_ETIMEDOUT);
@@ -322,8 +322,8 @@ STATIC mp_obj_t i2cperipheral_i2c_peripheral_request_read(size_t n_args, const m
 
     int i = 0;
     uint8_t *buffer = NULL;
-    uint64_t timeout_end = common_hal_time_monotonic() + 10 * 1000;
-    while (common_hal_time_monotonic() < timeout_end) {
+    uint64_t timeout_end = common_hal_time_monotonic_ms() + 10 * 1000;
+    while (common_hal_time_monotonic_ms() < timeout_end) {
         RUN_BACKGROUND_TASKS;
         if (mp_hal_is_interrupted()) {
             break;
diff --git a/shared-bindings/ipaddress/IPv4Address.c b/shared-bindings/ipaddress/IPv4Address.c
index b2a10158a..e027f32d6 100644
--- a/shared-bindings/ipaddress/IPv4Address.c
+++ b/shared-bindings/ipaddress/IPv4Address.c
@@ -126,7 +126,7 @@ const mp_obj_property_t ipaddress_ipv4address_version_obj = {
               (mp_obj_t)&mp_const_none_obj},
 };
 
-//|     def __eq__(self, other: IPv4Address) -> bool:
+//|     def __eq__(self, other: object) -> bool:
 //|         """Two Address objects are equal if their addresses and address types are equal."""
 //|         ...
 //|
diff --git a/shared-bindings/microcontroller/Processor.c b/shared-bindings/microcontroller/Processor.c
index 8c703891d..90cc02fe3 100644
--- a/shared-bindings/microcontroller/Processor.c
+++ b/shared-bindings/microcontroller/Processor.c
@@ -67,6 +67,23 @@ const mp_obj_property_t mcu_processor_frequency_obj = {
     },
 };
 
+//|     reset_reason: microcontroller.ResetReason
+//|     """The reason the microcontroller started up from reset state."""
+//|
+STATIC mp_obj_t mcu_processor_get_reset_reason(mp_obj_t self) {
+    return cp_enum_find(&mcu_reset_reason_type, common_hal_mcu_processor_get_reset_reason());
+}
+
+MP_DEFINE_CONST_FUN_OBJ_1(mcu_processor_get_reset_reason_obj, mcu_processor_get_reset_reason);
+
+const mp_obj_property_t mcu_processor_reset_reason_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&mcu_processor_get_reset_reason_obj,  // getter
+              (mp_obj_t)&mp_const_none_obj,            // no setter
+              (mp_obj_t)&mp_const_none_obj,            // no deleter
+    },
+};
+
 //|     temperature: Optional[float]
 //|     """The on-chip temperature, in Celsius, as a float. (read-only)
 //|
@@ -128,6 +145,7 @@ const mp_obj_property_t mcu_processor_voltage_obj = {
 
 STATIC const mp_rom_map_elem_t mcu_processor_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_frequency), MP_ROM_PTR(&mcu_processor_frequency_obj) },
+    { MP_ROM_QSTR(MP_QSTR_reset_reason), MP_ROM_PTR(&mcu_processor_reset_reason_obj) },
     { MP_ROM_QSTR(MP_QSTR_temperature), MP_ROM_PTR(&mcu_processor_temperature_obj) },
     { MP_ROM_QSTR(MP_QSTR_uid), MP_ROM_PTR(&mcu_processor_uid_obj) },
     { MP_ROM_QSTR(MP_QSTR_voltage), MP_ROM_PTR(&mcu_processor_voltage_obj) },
diff --git a/shared-bindings/microcontroller/Processor.h b/shared-bindings/microcontroller/Processor.h
index 0f520f940..98d479087 100644
--- a/shared-bindings/microcontroller/Processor.h
+++ b/shared-bindings/microcontroller/Processor.h
@@ -30,10 +30,12 @@
 #include "py/obj.h"
 
 #include "common-hal/microcontroller/Processor.h"
+#include "shared-bindings/microcontroller/ResetReason.h"
 
 extern const mp_obj_type_t mcu_processor_type;
 
 uint32_t common_hal_mcu_processor_get_frequency(void);
+mcu_reset_reason_t common_hal_mcu_processor_get_reset_reason(void);
 float common_hal_mcu_processor_get_temperature(void);
 void common_hal_mcu_processor_get_uid(uint8_t raw_id[]);
 float common_hal_mcu_processor_get_voltage(void);
diff --git a/shared-bindings/microcontroller/ResetReason.c b/shared-bindings/microcontroller/ResetReason.c
new file mode 100644
index 000000000..1750e5520
--- /dev/null
+++ b/shared-bindings/microcontroller/ResetReason.c
@@ -0,0 +1,77 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/obj.h"
+#include "py/enum.h"
+
+#include "shared-bindings/microcontroller/ResetReason.h"
+
+MAKE_ENUM_VALUE(mcu_reset_reason_type, reset_reason, POWER_ON, RESET_REASON_POWER_ON);
+MAKE_ENUM_VALUE(mcu_reset_reason_type, reset_reason, BROWNOUT, RESET_REASON_BROWNOUT);
+MAKE_ENUM_VALUE(mcu_reset_reason_type, reset_reason, SOFTWARE, RESET_REASON_SOFTWARE);
+MAKE_ENUM_VALUE(mcu_reset_reason_type, reset_reason, DEEP_SLEEP_ALARM, RESET_REASON_DEEP_SLEEP_ALARM);
+MAKE_ENUM_VALUE(mcu_reset_reason_type, reset_reason, RESET_PIN, RESET_REASON_RESET_PIN);
+MAKE_ENUM_VALUE(mcu_reset_reason_type, reset_reason, WATCHDOG, RESET_REASON_WATCHDOG);
+MAKE_ENUM_VALUE(mcu_reset_reason_type, reset_reason, UNKNOWN, RESET_REASON_UNKNOWN);
+
+//| class ResetReason:
+//|     """The reason the microntroller was last reset"""
+//|
+//|     POWER_ON: object
+//|     """The microntroller was started from power off."""
+//|
+//|     BROWNOUT: object
+//|     """The microntroller was reset due to too low a voltage."""
+//|
+//|     SOFTWARE: object
+//|     """The microntroller was reset from software."""
+//|
+//|     DEEP_SLEEP_ALARM: object
+//|     """The microntroller was reset for deep sleep and restarted by an alarm."""
+//|
+//|     RESET_PIN: object
+//|     """The microntroller was reset by a signal on its reset pin. The pin might be connected to a reset button."""
+//|
+//|     WATCHDOG: object
+//|     """The microcontroller was reset by its watchdog timer."""
+//|
+//|     UNKNOWN: object
+//|     """The microntroller restarted for an unknown reason."""
+//|
+MAKE_ENUM_MAP(mcu_reset_reason) {
+    MAKE_ENUM_MAP_ENTRY(reset_reason, POWER_ON),
+    MAKE_ENUM_MAP_ENTRY(reset_reason, BROWNOUT),
+    MAKE_ENUM_MAP_ENTRY(reset_reason, SOFTWARE),
+    MAKE_ENUM_MAP_ENTRY(reset_reason, DEEP_SLEEP_ALARM),
+    MAKE_ENUM_MAP_ENTRY(reset_reason, RESET_PIN),
+    MAKE_ENUM_MAP_ENTRY(reset_reason, WATCHDOG),
+    MAKE_ENUM_MAP_ENTRY(reset_reason, UNKNOWN),
+};
+STATIC MP_DEFINE_CONST_DICT(mcu_reset_reason_locals_dict, mcu_reset_reason_locals_table);
+
+MAKE_PRINTER(microcontroller, mcu_reset_reason);
+
+MAKE_ENUM_TYPE(microcontroller, ResetReason, mcu_reset_reason);
diff --git a/shared-bindings/microcontroller/ResetReason.h b/shared-bindings/microcontroller/ResetReason.h
new file mode 100644
index 000000000..8ed5e4831
--- /dev/null
+++ b/shared-bindings/microcontroller/ResetReason.h
@@ -0,0 +1,45 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_MCU_RESET_REASON__H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_MCU_RESET_REASON__H
+
+#include "py/obj.h"
+#include "py/enum.h"
+
+typedef enum {
+    RESET_REASON_POWER_ON,
+    RESET_REASON_BROWNOUT,
+    RESET_REASON_SOFTWARE,
+    RESET_REASON_DEEP_SLEEP_ALARM,
+    RESET_REASON_RESET_PIN,
+    RESET_REASON_WATCHDOG,
+    RESET_REASON_UNKNOWN,
+} mcu_reset_reason_t;
+
+extern const mp_obj_type_t mcu_reset_reason_type;
+
+#endif // MICROPY_INCLUDED_SHARED_BINDINGS_MCU_RESET_REASON__H
diff --git a/shared-bindings/microcontroller/__init__.c b/shared-bindings/microcontroller/__init__.c
index 2e58bdcc2..035587c30 100644
--- a/shared-bindings/microcontroller/__init__.c
+++ b/shared-bindings/microcontroller/__init__.c
@@ -39,7 +39,6 @@
 #include "shared-bindings/microcontroller/Pin.h"
 #include "shared-bindings/microcontroller/Processor.h"
 
-#include "py/runtime.h"
 #include "supervisor/shared/translate.h"
 
 //| """Pin references and cpu functionality
@@ -148,16 +147,6 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_0(mcu_reset_obj, mcu_reset);
 //| This object is the sole instance of `watchdog.WatchDogTimer` when available or ``None`` otherwise."""
 //|
 
-
-//| """:mod:`microcontroller.pin` --- Microcontroller pin names
-//| --------------------------------------------------------
-//|
-//| .. module:: microcontroller.pin
-//|   :synopsis: Microcontroller pin names
-//|   :platform: SAMD21
-//|
-//| References to pins as named by the microcontroller"""
-//|
 const mp_obj_module_t mcu_pin_module = {
     .base = { &mp_type_module },
     .globals = (mp_obj_dict_t*)&mcu_pin_globals,
@@ -181,6 +170,7 @@ STATIC const mp_rom_map_elem_t mcu_module_globals_table[] = {
     #else
     { MP_ROM_QSTR(MP_QSTR_watchdog),  MP_ROM_PTR(&mp_const_none_obj) },
     #endif
+    { MP_ROM_QSTR(MP_QSTR_ResetReason),  MP_ROM_PTR(&mcu_reset_reason_type) },
     { MP_ROM_QSTR(MP_QSTR_RunMode),  MP_ROM_PTR(&mcu_runmode_type) },
     { MP_ROM_QSTR(MP_QSTR_Pin),  MP_ROM_PTR(&mcu_pin_type) },
     { MP_ROM_QSTR(MP_QSTR_pin),  MP_ROM_PTR(&mcu_pin_module) },
diff --git a/shared-bindings/microcontroller/__init__.h b/shared-bindings/microcontroller/__init__.h
index 8abdff763..0dafc74c7 100644
--- a/shared-bindings/microcontroller/__init__.h
+++ b/shared-bindings/microcontroller/__init__.h
@@ -1,4 +1,3 @@
-
 /*
  * This file is part of the MicroPython project, http://micropython.org/
  *
@@ -28,11 +27,11 @@
 #ifndef MICROPY_INCLUDED_SHARED_BINDINGS_MICROCONTROLLER___INIT___H
 #define MICROPY_INCLUDED_SHARED_BINDINGS_MICROCONTROLLER___INIT___H
 
-#include "py/mpconfig.h"
 #include "py/obj.h"
+#include "py/mpconfig.h"
 
 #include "common-hal/microcontroller/Processor.h"
-
+#include "shared-bindings/microcontroller/ResetReason.h"
 #include "shared-bindings/microcontroller/RunMode.h"
 
 extern void common_hal_mcu_delay_us(uint32_t);
diff --git a/shared-bindings/os/__init__.c b/shared-bindings/os/__init__.c
index c499df972..8b9b38911 100644
--- a/shared-bindings/os/__init__.c
+++ b/shared-bindings/os/__init__.c
@@ -160,7 +160,7 @@ mp_obj_t os_stat(mp_obj_t path_in) {
 MP_DEFINE_CONST_FUN_OBJ_1(os_stat_obj, os_stat);
 
 //| def statvfs(path: str) -> Tuple[int, int, int, int, int, int, int, int, int, int]:
-//|     """Get the status of a fileystem.
+//|     """Get the status of a filesystem.
 //|
 //|     Returns a tuple with the filesystem information in the following order:
 //|
@@ -168,10 +168,10 @@ MP_DEFINE_CONST_FUN_OBJ_1(os_stat_obj, os_stat);
 //|          * ``f_frsize`` -- fragment size
 //|          * ``f_blocks`` -- size of fs in f_frsize units
 //|          * ``f_bfree`` -- number of free blocks
-//|          * ``f_bavail`` -- number of free blocks for unpriviliged users
+//|          * ``f_bavail`` -- number of free blocks for unprivileged users
 //|          * ``f_files`` -- number of inodes
 //|          * ``f_ffree`` -- number of free inodes
-//|          * ``f_favail`` -- number of free inodes for unpriviliged users
+//|          * ``f_favail`` -- number of free inodes for unprivileged users
 //|          * ``f_flag`` -- mount flags
 //|          * ``f_namemax`` -- maximum filename length
 //|
diff --git a/shared-bindings/ps2io/Ps2.c b/shared-bindings/ps2io/Ps2.c
index 0977e08ff..07fa5cebb 100644
--- a/shared-bindings/ps2io/Ps2.c
+++ b/shared-bindings/ps2io/Ps2.c
@@ -116,8 +116,9 @@ STATIC void check_for_deinit(ps2io_ps2_obj_t *self) {
 //|         ...
 //|
 STATIC mp_obj_t ps2io_ps2_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_ps2io_ps2_deinit(args[0]);
+    mp_check_self(MP_OBJ_IS_TYPE(args[0], &ps2io_ps2_type));
+    ps2io_ps2_obj_t *self = MP_OBJ_TO_PTR(args[0]);
+    common_hal_ps2io_ps2_deinit(self);
     return mp_const_none;
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(ps2io_ps2___exit___obj, 4, 4, ps2io_ps2_obj___exit__);
diff --git a/shared-bindings/random/__init__.h b/shared-bindings/random/__init__.h
index b5011b1a8..9e058051f 100644
--- a/shared-bindings/random/__init__.h
+++ b/shared-bindings/random/__init__.h
@@ -29,7 +29,7 @@
 
 // This depends on shared_module because nearly all functionality is port
 // agnostic. The random module only depends on the common_hal_os_urandom or
-// common_hal_time_monotonic to seed it initially.
+// common_hal_time_monotonic_ms to seed it initially.
 
 void shared_modules_random_seed(mp_uint_t seed);
 mp_uint_t shared_modules_random_getrandbits(uint8_t n);
diff --git a/shared-bindings/rgbmatrix/RGBMatrix.c b/shared-bindings/rgbmatrix/RGBMatrix.c
index 753c1c920..5f5ea4fae 100644
--- a/shared-bindings/rgbmatrix/RGBMatrix.c
+++ b/shared-bindings/rgbmatrix/RGBMatrix.c
@@ -197,6 +197,11 @@ STATIC mp_obj_t rgbmatrix_rgbmatrix_make_new(const mp_obj_type_t *type, size_t n
     uint8_t clock_pin = validate_pin(args[ARG_clock_pin].u_obj);
     uint8_t latch_pin = validate_pin(args[ARG_latch_pin].u_obj);
     uint8_t output_enable_pin = validate_pin(args[ARG_output_enable_pin].u_obj);
+    int bit_depth = args[ARG_bit_depth].u_int;
+
+    if (bit_depth <= 0 || bit_depth > 6) {
+        mp_raise_ValueError_varg(translate("Bit depth must be from 1 to 6 inclusive, not %d"), bit_depth);
+    }
 
     validate_pins(MP_QSTR_rgb_pins, rgb_pins, MP_ARRAY_SIZE(self->rgb_pins), args[ARG_rgb_list].u_obj, &rgb_count);
     validate_pins(MP_QSTR_addr_pins, addr_pins, MP_ARRAY_SIZE(self->addr_pins), args[ARG_addr_list].u_obj, &addr_count);
@@ -229,7 +234,7 @@ STATIC mp_obj_t rgbmatrix_rgbmatrix_make_new(const mp_obj_type_t *type, size_t n
 
     common_hal_rgbmatrix_rgbmatrix_construct(self,
         args[ARG_width].u_int,
-        args[ARG_bit_depth].u_int,
+        bit_depth,
         rgb_count, rgb_pins,
         addr_count, addr_pins,
         clock_pin, latch_pin, output_enable_pin,
diff --git a/shared-bindings/rotaryio/__init__.c b/shared-bindings/rotaryio/__init__.c
index fd8578753..cd967baa4 100644
--- a/shared-bindings/rotaryio/__init__.c
+++ b/shared-bindings/rotaryio/__init__.c
@@ -39,8 +39,6 @@
 //| `Wikipedia's Rotary Encoder page <https://en.wikipedia.org/wiki/Rotary_encoder>`_ for more
 //| background.
 //|
-//| .. warning:: This module is not available in some SAMD21 (aka M0) builds. See the :ref:`module-support-matrix` for more info.
-//|
 //| All classes change hardware state and should be deinitialized when they
 //| are no longer needed if the program continues after use. To do so, either
 //| call :py:meth:`!deinit` or use a context manager. See
diff --git a/shared-bindings/socket/__init__.c b/shared-bindings/socket/__init__.c
index 38840da5e..799bf28af 100644
--- a/shared-bindings/socket/__init__.c
+++ b/shared-bindings/socket/__init__.c
@@ -49,7 +49,14 @@ STATIC const mp_obj_type_t socket_type;
 
 //| class socket:
 //|
-//|     def __init__(self, family: int, type: int, proto: int) -> None:
+//|     AF_INET: int
+//|     AF_INET6: int
+//|     SOCK_STREAM: int
+//|     SOCK_DGRAM: int
+//|     SOCK_RAW: int
+//|     IPPROTO_TCP: int
+//|
+//|     def __init__(self, family: int = AF_INET, type: int = SOCK_STREAM, proto: int = IPPROTO_TCP) -> None:
 //|         """Create a new socket
 //|
 //|         :param int family: AF_INET or AF_INET6
@@ -57,12 +64,6 @@ STATIC const mp_obj_type_t socket_type;
 //|         :param int proto: IPPROTO_TCP, IPPROTO_UDP or IPPROTO_RAW (ignored)"""
 //|         ...
 //|
-//|     AF_INET: int
-//|     AF_INET6: int
-//|     SOCK_STREAM: int
-//|     SOCK_DGRAM: int
-//|     SOCK_RAW: int
-//|
 
 STATIC mp_obj_t socket_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
     mp_arg_check_num(n_args, kw_args, 0, 4, false);
diff --git a/shared-bindings/socketpool/Socket.c b/shared-bindings/socketpool/Socket.c
index e7b31842d..0e6968d5f 100644
--- a/shared-bindings/socketpool/Socket.c
+++ b/shared-bindings/socketpool/Socket.c
@@ -36,6 +36,8 @@
 #include "py/runtime.h"
 #include "py/mperrno.h"
 
+#include "lib/netutils/netutils.h"
+
 //| class Socket:
 //|     """TCP, UDP and RAW socket. Cannot be created directly. Instead, call
 //|        `SocketPool.socket()`.
@@ -161,7 +163,7 @@ STATIC mp_obj_t socketpool_socket_close(mp_obj_t self_in) {
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(socketpool_socket_close_obj, socketpool_socket_close);
 
-//|     def connect(self, address: tuple) -> None:
+//|     def connect(self, address: Tuple[str, int]) -> None:
 //|         """Connect a socket to a remote address
 //|
 //|         :param ~tuple address: tuple of (remote_address, remote_port)"""
@@ -274,79 +276,63 @@ STATIC mp_obj_t socketpool_socket_recv_into(size_t n_args, const mp_obj_t *args)
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socketpool_socket_recv_into_obj, 2, 3, socketpool_socket_recv_into);
 
-// //|     def sendto(self, bytes: ReadableBuffer, address: tuple) -> int:
-// //|         """Send some bytes to a specific address.
-// //|         Suits sockets of type SOCK_DGRAM
-// //|
-// //|         :param ~bytes bytes: some bytes to send
-// //|         :param ~tuple address: tuple of (remote_address, remote_port)"""
-// //|         ...
-// //|
-
-// STATIC mp_obj_t socketpool_socket_sendto(mp_obj_t self_in, mp_obj_t data_in, mp_obj_t addr_in) {
-//     // mod_network_socket_obj_t *self = MP_OBJ_TO_PTR(self_in);
+//|     def sendto(self, bytes: ReadableBuffer, address: Tuple[str, int]) -> int:
+//|         """Send some bytes to a specific address.
+//|         Suits sockets of type SOCK_DGRAM
+//|
+//|         :param ~bytes bytes: some bytes to send
+//|         :param ~tuple address: tuple of (remote_address, remote_port)"""
+//|         ...
+//|
 
-//     // // get the data
-//     // mp_buffer_info_t bufinfo;
-//     // mp_get_buffer_raise(data_in, &bufinfo, MP_BUFFER_READ);
+STATIC mp_obj_t socketpool_socket_sendto(mp_obj_t self_in, mp_obj_t data_in, mp_obj_t addr_in) {
+    socketpool_socket_obj_t *self = MP_OBJ_TO_PTR(self_in);
 
-//     // // get address
-//     // uint8_t ip[MOD_NETWORK_IPADDR_BUF_SIZE];
-//     // mp_uint_t port = netutils_parse_inet_addr(addr_in, ip, NETUTILS_BIG);
+    // get the data
+    mp_buffer_info_t bufinfo;
+    mp_get_buffer_raise(data_in, &bufinfo, MP_BUFFER_READ);
 
-//     // // check if we need to select a NIC
-//     // socket_select_nic(self, ip);
+    mp_obj_t *addr_items;
+    mp_obj_get_array_fixed_n(addr_in, 2, &addr_items);
 
-//     // // call the NIC to sendto
-//     // int _errno;
-//     // mp_int_t ret = self->nic_type->sendto(self, bufinfo.buf, bufinfo.len, ip, port, &_errno);
-//     // if (ret == -1) {
-//     //     mp_raise_OSError(_errno);
-//     // }
-//     mp_int_t ret = 0;
+    size_t hostlen;
+    const char* host = mp_obj_str_get_data(addr_items[0], &hostlen);
+    mp_int_t port = mp_obj_get_int(addr_items[1]);
 
-//     return mp_obj_new_int(ret);
-// }
-// STATIC MP_DEFINE_CONST_FUN_OBJ_3(socketpool_socket_sendto_obj, socketpool_socket_sendto);
+    mp_int_t ret = common_hal_socketpool_socket_sendto(self, host, hostlen, port, bufinfo.buf, bufinfo.len);
+    if (!ret) {
+        mp_raise_OSError(0);
+    }
 
-// //|     def recvfrom(self, bufsize: int) -> Tuple[bytes, tuple]:
-// //|         """Reads some bytes from the connected remote address.
-// //|         Suits sockets of type SOCK_STREAM
-// //|
-// //|         Returns a tuple containing
-// //|         * a bytes() of length <= bufsize
-// //|         * a remote_address, which is a tuple of ip address and port number
-// //|
-// //|         :param ~int bufsize: maximum number of bytes to receive"""
-// //|         ...
-// //|
+    return mp_obj_new_int_from_uint(ret);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_3(socketpool_socket_sendto_obj, socketpool_socket_sendto);
 
-// STATIC mp_obj_t socketpool_socket_recvfrom_into(mp_obj_t self_in, mp_obj_t len_in) {
-//     // mod_network_socket_obj_t *self = MP_OBJ_TO_PTR(self_in);
-//     // if (self->nic == MP_OBJ_NULL) {
-//     //     // not connected
-//     //     mp_raise_OSError(MP_ENOTCONN);
-//     // }
-//     // vstr_t vstr;
-//     // vstr_init_len(&vstr, mp_obj_get_int(len_in));
-//     // byte ip[4];
-//     // mp_uint_t port;
-//     // int _errno;
-//     // mp_int_t ret = self->nic_type->recvfrom(self, (byte*)vstr.buf, vstr.len, ip, &port, &_errno);
-//     // if (ret == -1) {
-//     //     mp_raise_OSError(_errno);
-//     // }
-//     mp_obj_t tuple[2];
-//     // if (ret == 0) {
-//     //     tuple[0] = mp_const_empty_bytes;
-//     // } else {
-//     //     vstr.len = ret;
-//     //     tuple[0] = mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
-//     // }
-//     // tuple[1] = netutils_format_inet_addr(ip, port, NETUTILS_BIG);
-//     return mp_obj_new_tuple(2, tuple);
-// }
-// STATIC MP_DEFINE_CONST_FUN_OBJ_2(socketpool_socket_recvfrom_into_obj, socketpool_socket_recvfrom_into);
+//|     def recvfrom_into(self, buffer: WriteableBuffer) -> Tuple[int, Tuple[str, int]]:
+//|         """Reads some bytes from a remote address.
+//|
+//|         Returns a tuple containing
+//|         * the number of bytes received into the given buffer
+//|         * a remote_address, which is a tuple of ip address and port number
+//|
+//|         :param object buffer: buffer to read into"""
+//|         ...
+//|
+STATIC mp_obj_t socketpool_socket_recvfrom_into(mp_obj_t self_in, mp_obj_t data_in) {
+    socketpool_socket_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    mp_buffer_info_t bufinfo;
+    mp_get_buffer_raise(data_in, &bufinfo, MP_BUFFER_WRITE);
+
+    byte ip[4];
+    mp_uint_t port;
+    mp_int_t ret = common_hal_socketpool_socket_recvfrom_into(self,
+        (byte*)bufinfo.buf, bufinfo.len, ip, &port);
+    mp_obj_t tuple_contents[2];
+    tuple_contents[0] = mp_obj_new_int_from_uint(ret);
+    tuple_contents[1] = netutils_format_inet_addr(ip, port, NETUTILS_BIG);
+    return mp_obj_new_tuple(2, tuple_contents);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(socketpool_socket_recvfrom_into_obj, socketpool_socket_recvfrom_into);
 
 // //|     def setsockopt(self, level: int, optname: int, value: int) -> None:
 // //|         """Sets socket options"""
@@ -449,8 +435,8 @@ STATIC const mp_rom_map_elem_t socketpool_socket_locals_dict_table[] = {
     // { MP_ROM_QSTR(MP_QSTR_accept), MP_ROM_PTR(&socketpool_socket_accept_obj) },
     { MP_ROM_QSTR(MP_QSTR_connect), MP_ROM_PTR(&socketpool_socket_connect_obj) },
     { MP_ROM_QSTR(MP_QSTR_send), MP_ROM_PTR(&socketpool_socket_send_obj) },
-    // { MP_ROM_QSTR(MP_QSTR_sendto), MP_ROM_PTR(&socketpool_socket_sendto_obj) },
-    // { MP_ROM_QSTR(MP_QSTR_recvfrom_into), MP_ROM_PTR(&socketpool_socket_recvfrom_into_obj) },
+    { MP_ROM_QSTR(MP_QSTR_sendto), MP_ROM_PTR(&socketpool_socket_sendto_obj) },
+    { MP_ROM_QSTR(MP_QSTR_recvfrom_into), MP_ROM_PTR(&socketpool_socket_recvfrom_into_obj) },
     { MP_ROM_QSTR(MP_QSTR_recv_into), MP_ROM_PTR(&socketpool_socket_recv_into_obj) },
     // { MP_ROM_QSTR(MP_QSTR_setsockopt), MP_ROM_PTR(&socketpool_socket_setsockopt_obj) },
     { MP_ROM_QSTR(MP_QSTR_settimeout), MP_ROM_PTR(&socketpool_socket_settimeout_obj) },
diff --git a/shared-bindings/socketpool/Socket.h b/shared-bindings/socketpool/Socket.h
index f0be95c92..54fbe59b2 100644
--- a/shared-bindings/socketpool/Socket.h
+++ b/shared-bindings/socketpool/Socket.h
@@ -35,6 +35,10 @@ void common_hal_socketpool_socket_settimeout(socketpool_socket_obj_t* self, mp_u
 bool common_hal_socketpool_socket_connect(socketpool_socket_obj_t* self, const char* host, size_t hostlen, mp_int_t port);
 mp_uint_t common_hal_socketpool_socket_send(socketpool_socket_obj_t* self, const uint8_t* buf, mp_uint_t len);
 mp_uint_t common_hal_socketpool_socket_recv_into(socketpool_socket_obj_t* self, const uint8_t* buf, mp_uint_t len);
+mp_uint_t common_hal_socketpool_socket_sendto(socketpool_socket_obj_t* self,
+    const char* host, size_t hostlen, uint8_t port, const uint8_t* buf, mp_uint_t len);
+mp_uint_t common_hal_socketpool_socket_recvfrom_into(socketpool_socket_obj_t* self,
+    uint8_t* buf, mp_uint_t len, uint8_t* ip, uint *port);
 void common_hal_socketpool_socket_close(socketpool_socket_obj_t* self);
 bool common_hal_socketpool_socket_get_closed(socketpool_socket_obj_t* self);
 bool common_hal_socketpool_socket_get_connected(socketpool_socket_obj_t* self);
diff --git a/shared-bindings/socketpool/SocketPool.c b/shared-bindings/socketpool/SocketPool.c
index 527cf7e98..73eeed265 100644
--- a/shared-bindings/socketpool/SocketPool.c
+++ b/shared-bindings/socketpool/SocketPool.c
@@ -57,8 +57,14 @@ STATIC mp_obj_t socketpool_socketpool_make_new(const mp_obj_type_t *type, size_t
     return MP_OBJ_FROM_PTR(s);
 }
 
-
-//|     def socket(self, family: int = AF_INET, type: int = SOCK_STREAM, proto: int = IPPROTO_TCP) -> None:
+//|     AF_INET: int
+//|     AF_INET6: int
+//|     SOCK_STREAM: int
+//|     SOCK_DGRAM: int
+//|     SOCK_RAW: int
+//|     IPPROTO_TCP: int
+//|
+//|     def socket(self, family: int = AF_INET, type: int = SOCK_STREAM, proto: int = IPPROTO_TCP) -> socketpool.Socket:
 //|         """Create a new socket
 //|
 //|         :param ~int family: AF_INET or AF_INET6
@@ -66,6 +72,7 @@ STATIC mp_obj_t socketpool_socketpool_make_new(const mp_obj_type_t *type, size_t
 //|         :param ~int proto: IPPROTO_TCP, IPPROTO_UDP or IPPROTO_RAW (ignored)"""
 //|         ...
 //|
+
 STATIC mp_obj_t socketpool_socketpool_socket(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
     mp_arg_check_num(n_args, kw_args, 0, 5, false);
 
@@ -82,7 +89,7 @@ STATIC mp_obj_t socketpool_socketpool_socket(size_t n_args, const mp_obj_t *pos_
 }
 MP_DEFINE_CONST_FUN_OBJ_KW(socketpool_socketpool_socket_obj, 1, socketpool_socketpool_socket);
 
-//| def getaddrinfo(host: str, port: int, family: int = 0, type: int = 0, proto: int = 0, flags: int = 0) -> tuple:
+//| def getaddrinfo(host: str, port: int, family: int = 0, type: int = 0, proto: int = 0, flags: int = 0) -> Tuple[int, int, int, str, Tuple[str, int]]:
 //|     """Gets the address information for a hostname and port
 //|
 //|     Returns the appropriate family, socket type, socket protocol and
diff --git a/shared-bindings/ssl/SSLContext.c b/shared-bindings/ssl/SSLContext.c
index d2c236d3b..9d4df7261 100644
--- a/shared-bindings/ssl/SSLContext.c
+++ b/shared-bindings/ssl/SSLContext.c
@@ -51,7 +51,7 @@ STATIC mp_obj_t ssl_sslcontext_make_new(const mp_obj_type_t *type, size_t n_args
     return MP_OBJ_FROM_PTR(s);
 }
 
-//| def wrap_socket(sock: socketpool.Socket, *, server_side: bool = False, server_hostname: str = None) -> socketpool.Socket:
+//| def wrap_socket(sock: socketpool.Socket, *, server_side: bool = False, server_hostname: Optional[str] = None) -> socketpool.Socket:
 //|     """Wraps the socket into a socket-compatible class that handles SSL negotiation.
 //|        The socket must be of type SOCK_STREAM."""
 //|     ...
diff --git a/shared-bindings/supervisor/RunReason.c b/shared-bindings/supervisor/RunReason.c
new file mode 100644
index 000000000..a2a5fe13e
--- /dev/null
+++ b/shared-bindings/supervisor/RunReason.c
@@ -0,0 +1,62 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/enum.h"
+
+#include "shared-bindings/supervisor/RunReason.h"
+
+MAKE_ENUM_VALUE(supervisor_run_reason_type, run_reason, STARTUP, RUN_REASON_STARTUP);
+MAKE_ENUM_VALUE(supervisor_run_reason_type, run_reason, AUTO_RELOAD, RUN_REASON_AUTO_RELOAD);
+MAKE_ENUM_VALUE(supervisor_run_reason_type, run_reason, SUPERVISOR_RELOAD, RUN_REASON_SUPERVISOR_RELOAD);
+MAKE_ENUM_VALUE(supervisor_run_reason_type, run_reason, REPL_RELOAD, RUN_REASON_REPL_RELOAD);
+
+//| class RunReason:
+//|     """The reason that CircuitPython started running."""
+//|
+//|     STARTUP: object
+//|     """CircuitPython started the microcontroller started up. See `microcontroller.Processor.reset_reason`
+//|        for more detail on why the microcontroller was started."""
+//|
+//|     AUTO_RELOAD: object
+//|     """CircuitPython restarted due to an external write to the filesystem."""
+//|
+//|     SUPERVISOR_RELOAD: object
+//|     """CircuitPython restarted due to a call to `supervisor.reload()`."""
+//|
+//|     REPL_RELOAD: object
+//|     """CircuitPython started due to the user typing CTRL-D in the REPL."""
+//|
+MAKE_ENUM_MAP(supervisor_run_reason) {
+    MAKE_ENUM_MAP_ENTRY(run_reason, STARTUP),
+    MAKE_ENUM_MAP_ENTRY(run_reason, AUTO_RELOAD),
+    MAKE_ENUM_MAP_ENTRY(run_reason, SUPERVISOR_RELOAD),
+    MAKE_ENUM_MAP_ENTRY(run_reason, REPL_RELOAD),
+};
+STATIC MP_DEFINE_CONST_DICT(supervisor_run_reason_locals_dict, supervisor_run_reason_locals_table);
+
+MAKE_PRINTER(supervisor, supervisor_run_reason);
+
+MAKE_ENUM_TYPE(supervisor, RunReason, supervisor_run_reason);
diff --git a/shared-bindings/supervisor/RunReason.h b/shared-bindings/supervisor/RunReason.h
new file mode 100644
index 000000000..391e6d306
--- /dev/null
+++ b/shared-bindings/supervisor/RunReason.h
@@ -0,0 +1,36 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#pragma once
+
+typedef enum {
+    RUN_REASON_STARTUP,
+    RUN_REASON_AUTO_RELOAD,
+    RUN_REASON_SUPERVISOR_RELOAD,
+    RUN_REASON_REPL_RELOAD,
+} supervisor_run_reason_t;
+
+extern const mp_obj_type_t supervisor_run_reason_type;
diff --git a/shared-bindings/supervisor/Runtime.c b/shared-bindings/supervisor/Runtime.c
index bfca6e7b1..8e0259a3b 100755
--- a/shared-bindings/supervisor/Runtime.c
+++ b/shared-bindings/supervisor/Runtime.c
@@ -25,9 +25,16 @@
  */
 
 #include <stdbool.h>
+#include "py/obj.h"
+#include "py/enum.h"
+#include "py/runtime.h"
 #include "py/objproperty.h"
+
+#include "shared-bindings/supervisor/RunReason.h"
 #include "shared-bindings/supervisor/Runtime.h"
 
+STATIC supervisor_run_reason_t _run_reason;
+
 //TODO: add USB, REPL to description once they're operational
 //| class Runtime:
 //|     """Current status of runtime objects.
@@ -90,9 +97,29 @@ const mp_obj_property_t supervisor_serial_bytes_available_obj = {
 };
 
 
+//|     run_reason: RunReason
+//|     """Returns why CircuitPython started running this particular time."""
+//|
+STATIC mp_obj_t supervisor_get_run_reason(mp_obj_t self) {
+    return cp_enum_find(&supervisor_run_reason_type, _run_reason);
+}
+MP_DEFINE_CONST_FUN_OBJ_1(supervisor_get_run_reason_obj, supervisor_get_run_reason);
+
+const mp_obj_property_t supervisor_run_reason_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&supervisor_get_run_reason_obj,
+              (mp_obj_t)&mp_const_none_obj,
+              (mp_obj_t)&mp_const_none_obj},
+};
+
+void supervisor_set_run_reason(supervisor_run_reason_t run_reason) {
+    _run_reason = run_reason;
+}
+
 STATIC const mp_rom_map_elem_t supervisor_runtime_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_serial_connected), MP_ROM_PTR(&supervisor_serial_connected_obj) },
     { MP_ROM_QSTR(MP_QSTR_serial_bytes_available), MP_ROM_PTR(&supervisor_serial_bytes_available_obj) },
+    { MP_ROM_QSTR(MP_QSTR_run_reason), MP_ROM_PTR(&supervisor_run_reason_obj) },
 };
 
 STATIC MP_DEFINE_CONST_DICT(supervisor_runtime_locals_dict, supervisor_runtime_locals_dict_table);
diff --git a/shared-bindings/supervisor/Runtime.h b/shared-bindings/supervisor/Runtime.h
index 2dc59c3ab..51ed7604d 100755
--- a/shared-bindings/supervisor/Runtime.h
+++ b/shared-bindings/supervisor/Runtime.h
@@ -30,9 +30,12 @@
 #include <stdbool.h>
 #include "py/obj.h"
 
+#include "shared-bindings/supervisor/RunReason.h"
 
 extern const mp_obj_type_t supervisor_runtime_type;
 
+void supervisor_set_run_reason(supervisor_run_reason_t run_reason);
+
 bool common_hal_get_serial_connected(void);
 
 bool common_hal_get_serial_bytes_available(void);
diff --git a/shared-bindings/supervisor/__init__.c b/shared-bindings/supervisor/__init__.c
index bc6fdbff5..ad8603047 100644
--- a/shared-bindings/supervisor/__init__.c
+++ b/shared-bindings/supervisor/__init__.c
@@ -32,7 +32,9 @@
 #include "supervisor/shared/rgb_led_status.h"
 #include "supervisor/shared/stack.h"
 #include "supervisor/shared/translate.h"
+#include "supervisor/shared/workflow.h"
 
+#include "shared-bindings/microcontroller/__init__.h"
 #include "shared-bindings/supervisor/__init__.h"
 #include "shared-bindings/supervisor/Runtime.h"
 
@@ -88,6 +90,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(supervisor_set_rgb_status_brightness_obj, supervisor_s
 //|
 STATIC mp_obj_t supervisor_reload(void) {
     reload_requested = true;
+    supervisor_set_run_reason(RUN_REASON_SUPERVISOR_RELOAD);
     mp_raise_reload_exception();
     return mp_const_none;
 }
@@ -111,11 +114,12 @@ MP_DEFINE_CONST_FUN_OBJ_1(supervisor_set_next_stack_limit_obj, supervisor_set_ne
 
 STATIC const mp_rom_map_elem_t supervisor_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_supervisor) },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_enable_autoreload),  MP_ROM_PTR(&supervisor_enable_autoreload_obj) },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_disable_autoreload),  MP_ROM_PTR(&supervisor_disable_autoreload_obj) },
-    { MP_OBJ_NEW_QSTR(MP_QSTR_set_rgb_status_brightness),  MP_ROM_PTR(&supervisor_set_rgb_status_brightness_obj) },
+    { MP_ROM_QSTR(MP_QSTR_enable_autoreload),  MP_ROM_PTR(&supervisor_enable_autoreload_obj) },
+    { MP_ROM_QSTR(MP_QSTR_disable_autoreload),  MP_ROM_PTR(&supervisor_disable_autoreload_obj) },
+    { MP_ROM_QSTR(MP_QSTR_set_rgb_status_brightness),  MP_ROM_PTR(&supervisor_set_rgb_status_brightness_obj) },
     { MP_ROM_QSTR(MP_QSTR_runtime),  MP_ROM_PTR(&common_hal_supervisor_runtime_obj) },
     { MP_ROM_QSTR(MP_QSTR_reload),  MP_ROM_PTR(&supervisor_reload_obj) },
+    { MP_ROM_QSTR(MP_QSTR_RunReason),  MP_ROM_PTR(&supervisor_run_reason_type) },
     { MP_ROM_QSTR(MP_QSTR_set_next_stack_limit),  MP_ROM_PTR(&supervisor_set_next_stack_limit_obj) },
 
 };
diff --git a/shared-bindings/time/__init__.c b/shared-bindings/time/__init__.c
index 44f82c62e..2624384af 100644
--- a/shared-bindings/time/__init__.c
+++ b/shared-bindings/time/__init__.c
@@ -51,9 +51,8 @@
 //|     ...
 //|
 STATIC mp_obj_t time_monotonic(void) {
-    uint64_t time64 = common_hal_time_monotonic();
-    // 4294967296 = 2^32
-    return mp_obj_new_float(((uint32_t) (time64 >> 32) * 4294967296.0f + (uint32_t) (time64 & 0xffffffff)) / 1000.0f);
+    uint64_t ticks_ms = common_hal_time_monotonic_ms();
+    return mp_obj_new_float(uint64_to_float(ticks_ms) / 1000.0f);
 }
 MP_DEFINE_CONST_FUN_OBJ_0(time_monotonic_obj, time_monotonic);
 
diff --git a/shared-bindings/time/__init__.h b/shared-bindings/time/__init__.h
index ec96aea24..4e716e9df 100644
--- a/shared-bindings/time/__init__.h
+++ b/shared-bindings/time/__init__.h
@@ -35,7 +35,7 @@
 extern mp_obj_t struct_time_from_tm(timeutils_struct_time_t *tm);
 extern void struct_time_to_tm(mp_obj_t t, timeutils_struct_time_t *tm);
 
-extern uint64_t common_hal_time_monotonic(void);
+extern uint64_t common_hal_time_monotonic_ms(void);
 extern uint64_t common_hal_time_monotonic_ns(void);
 extern void common_hal_time_delay_ms(uint32_t);
 
diff --git a/shared-bindings/watchdog/WatchDogTimer.c b/shared-bindings/watchdog/WatchDogTimer.c
index 09219f710..575021a21 100644
--- a/shared-bindings/watchdog/WatchDogTimer.c
+++ b/shared-bindings/watchdog/WatchDogTimer.c
@@ -66,6 +66,7 @@ STATIC mp_obj_t watchdog_watchdogtimer_feed(mp_obj_t self_in) {
     if (current_mode == WATCHDOGMODE_NONE) {
         mp_raise_ValueError(translate("WatchDogTimer is not currently running"));
     }
+
     common_hal_watchdog_feed(self);
     return mp_const_none;
 }
@@ -78,12 +79,6 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(watchdog_watchdogtimer_feed_obj, watchdog_watch
 //|
 STATIC mp_obj_t watchdog_watchdogtimer_deinit(mp_obj_t self_in) {
     watchdog_watchdogtimer_obj_t *self = MP_OBJ_TO_PTR(self_in);
-    watchdog_watchdogmode_t current_mode = common_hal_watchdog_get_mode(self);
-
-    if (current_mode == WATCHDOGMODE_RESET) {
-        mp_raise_NotImplementedError(translate("WatchDogTimer cannot be deinitialized once mode is set to RESET"));
-    }
-
     common_hal_watchdog_deinit(self);
     return mp_const_none;
 }
diff --git a/shared-bindings/wifi/Network.c b/shared-bindings/wifi/Network.c
index bf970a9c0..009712ad1 100644
--- a/shared-bindings/wifi/Network.c
+++ b/shared-bindings/wifi/Network.c
@@ -108,12 +108,29 @@ const mp_obj_property_t wifi_network_channel_obj = {
                (mp_obj_t)&mp_const_none_obj },
 };
 
+//|     country: str
+//|     """String id of the country code"""
+//|
+STATIC mp_obj_t wifi_network_get_country(mp_obj_t self) {
+    return common_hal_wifi_network_get_country(self);
+
+}
+MP_DEFINE_CONST_FUN_OBJ_1(wifi_network_get_country_obj, wifi_network_get_country);
+
+const mp_obj_property_t wifi_network_country_obj = {
+    .base.type = &mp_type_property,
+    .proxy = { (mp_obj_t)&wifi_network_get_country_obj,
+               (mp_obj_t)&mp_const_none_obj,
+               (mp_obj_t)&mp_const_none_obj },
+};
+
 
 STATIC const mp_rom_map_elem_t wifi_network_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_ssid), MP_ROM_PTR(&wifi_network_ssid_obj) },
     { MP_ROM_QSTR(MP_QSTR_bssid), MP_ROM_PTR(&wifi_network_bssid_obj) },
     { MP_ROM_QSTR(MP_QSTR_rssi), MP_ROM_PTR(&wifi_network_rssi_obj) },
     { MP_ROM_QSTR(MP_QSTR_channel), MP_ROM_PTR(&wifi_network_channel_obj) },
+    { MP_ROM_QSTR(MP_QSTR_country), MP_ROM_PTR(&wifi_network_country_obj) },
 };
 
 STATIC MP_DEFINE_CONST_DICT(wifi_network_locals_dict, wifi_network_locals_dict_table);
diff --git a/shared-bindings/wifi/Network.h b/shared-bindings/wifi/Network.h
index c9bbc685e..e672e3108 100644
--- a/shared-bindings/wifi/Network.h
+++ b/shared-bindings/wifi/Network.h
@@ -39,5 +39,6 @@ extern mp_obj_t common_hal_wifi_network_get_ssid(wifi_network_obj_t *self);
 extern mp_obj_t common_hal_wifi_network_get_bssid(wifi_network_obj_t *self);
 extern mp_obj_t common_hal_wifi_network_get_rssi(wifi_network_obj_t *self);
 extern mp_obj_t common_hal_wifi_network_get_channel(wifi_network_obj_t *self);
+extern mp_obj_t common_hal_wifi_network_get_country(wifi_network_obj_t *self);
 
 #endif // MICROPY_INCLUDED_SHARED_BINDINGS_WIFI_NETWORK_H
diff --git a/shared-bindings/wifi/Radio.c b/shared-bindings/wifi/Radio.c
index a274c437e..723572a32 100644
--- a/shared-bindings/wifi/Radio.c
+++ b/shared-bindings/wifi/Radio.c
@@ -48,17 +48,28 @@
 //|
 
 //|     enabled: bool
-//|     """True when the wifi radio is enabled."""
+//|     """``True`` when the wifi radio is enabled.
+//|     If you set the value to ``False``, any open sockets will be closed.
+//|     """
 //|
 STATIC mp_obj_t wifi_radio_get_enabled(mp_obj_t self) {
     return mp_obj_new_bool(common_hal_wifi_radio_get_enabled(self));
 }
 MP_DEFINE_CONST_FUN_OBJ_1(wifi_radio_get_enabled_obj, wifi_radio_get_enabled);
 
+static mp_obj_t wifi_radio_set_enabled(mp_obj_t self, mp_obj_t value) {
+    const bool enabled = mp_obj_is_true(value);
+
+    common_hal_wifi_radio_set_enabled(self, enabled);
+
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(wifi_radio_set_enabled_obj, wifi_radio_set_enabled);
+
 const mp_obj_property_t wifi_radio_enabled_obj = {
     .base.type = &mp_type_property,
     .proxy = { (mp_obj_t)&wifi_radio_get_enabled_obj,
-               (mp_obj_t)&mp_const_none_obj,
+               (mp_obj_t)&wifi_radio_set_enabled_obj,
                (mp_obj_t)&mp_const_none_obj },
 };
 
@@ -79,7 +90,7 @@ const mp_obj_property_t wifi_radio_mac_address_obj = {
 };
 
 
-//|     def start_scanning_networks(self, *, start_channel=1, stop_channel=11) -> Iterable[Network]:
+//|     def start_scanning_networks(self, *, start_channel: int = 1, stop_channel: int = 11) -> Iterable[Network]:
 //|         """Scans for available wifi networks over the given channel range. Make sure the channels are allowed in your country."""
 //|         ...
 //|
@@ -142,9 +153,25 @@ const mp_obj_property_t wifi_radio_hostname_obj = {
               (mp_obj_t)&mp_const_none_obj},
 };
 
-//|     def connect(self, ssid: ReadableBuffer, password: ReadableBuffer = b"", *, channel: Optional[int] = 0, timeout: Optional[float] = None) -> bool:
+//|     def connect(self,
+//|                 ssid: ReadableBuffer,
+//|                 password: ReadableBuffer = b"",
+//|                 *,
+//|                 channel: Optional[int] = 0,
+//|                 bssid: Optional[ReadableBuffer] = b"",
+//|                 timeout: Optional[float] = None) -> bool:
 //|         """Connects to the given ssid and waits for an ip address. Reconnections are handled
-//|            automatically once one connection succeeds."""
+//|            automatically once one connection succeeds.
+//|
+//|            By default, this will scan all channels and connect to the access point (AP) with the
+//|            given ``ssid`` and greatest signal strength (rssi).
+//|
+//|            If ``channel`` is given, the scan will begin with the given channel and connect to
+//|            the first AP with the given ``ssid``. This can speed up the connection time
+//|            significantly because a full scan doesn't occur.
+//|
+//|            If ``bssid`` is given, the scan will start at the first channel or the one given and
+//|            connect to the AP with the given ``bssid`` and ``ssid``."""
 //|         ...
 //|
 STATIC mp_obj_t wifi_radio_connect(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
@@ -268,7 +295,7 @@ const mp_obj_property_t wifi_radio_ipv4_dns_obj = {
 };
 
 //|     ap_info: Optional[Network]
-//|     """Network object containing BSSID, SSID, channel, and RSSI when connected to an access point. None otherwise."""
+//|     """Network object containing BSSID, SSID, channel, country and RSSI when connected to an access point. None otherwise."""
 //|
 STATIC mp_obj_t wifi_radio_get_ap_info(mp_obj_t self) {
     return common_hal_wifi_radio_get_ap_info(self);
@@ -283,7 +310,7 @@ const mp_obj_property_t wifi_radio_ap_info_obj = {
                (mp_obj_t)&mp_const_none_obj },
 };
 
-//|     def ping(self, ip, *, timeout: float = 0.5) -> float:
+//|     def ping(self, ip: ipaddress.IPv4Address, *, timeout: Optional[float] = 0.5) -> float:
 //|         """Ping an IP to test connectivity. Returns echo time in seconds.
 //|            Returns None when it times out."""
 //|         ...
diff --git a/shared-bindings/wifi/__init__.h b/shared-bindings/wifi/__init__.h
index c06ee16be..124c0bc49 100644
--- a/shared-bindings/wifi/__init__.h
+++ b/shared-bindings/wifi/__init__.h
@@ -34,5 +34,6 @@
 extern wifi_radio_obj_t common_hal_wifi_radio_obj;
 
 void common_hal_wifi_init(void);
+void common_hal_wifi_gc_collect(void);
 
 #endif // MICROPY_INCLUDED_SHARED_BINDINGS_WIFI___INIT___H