diff --git a/locale/circuitpython.pot b/locale/circuitpython.pot
index c4951f78f92ab..9702568df543a 100644
--- a/locale/circuitpython.pot
+++ b/locale/circuitpython.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2020-09-29 20:14-0500\n"
+"POT-Creation-Date: 2020-10-07 09:55+0530\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -17,6 +17,13 @@ msgstr ""
 "Content-Type: text/plain; charset=CHARSET\n"
 "Content-Transfer-Encoding: 8bit\n"
 
+#: main.c
+msgid ""
+"\n"
+"\n"
+"------ soft reboot ------\n"
+msgstr ""
+
 #: main.c
 msgid ""
 "\n"
@@ -948,6 +955,10 @@ msgstr ""
 msgid "I2SOut not available"
 msgstr ""
 
+#: ports/esp32s2/common-hal/alarm_io/__init__.c
+msgid "IOs 0, 2 & 4 do not support internal pullup in sleep"
+msgstr ""
+
 #: shared-bindings/aesio/aes.c
 #, c-format
 msgid "IV must be %d bytes long"
@@ -2743,6 +2754,10 @@ msgstr ""
 msgid "invalid syntax for number"
 msgstr ""
 
+#: ports/esp32s2/common-hal/alarm_io/__init__.c
+msgid "io must be rtc io"
+msgstr ""
+
 #: py/objtype.c
 msgid "issubclass() arg 1 must be a class"
 msgstr ""
@@ -3144,6 +3159,7 @@ msgstr ""
 msgid "pow() with 3 arguments requires integers"
 msgstr ""
 
+#: ports/esp32s2/boards/adafruit_metro_esp32s2/mpconfigboard.h
 #: ports/esp32s2/boards/electroniccats_bastwifi/mpconfigboard.h
 #: ports/esp32s2/boards/espressif_kaluga_1/mpconfigboard.h
 #: ports/esp32s2/boards/espressif_saola_1_wroom/mpconfigboard.h
@@ -3151,6 +3167,7 @@ msgstr ""
 #: ports/esp32s2/boards/microdev_micro_s2/mpconfigboard.h
 #: ports/esp32s2/boards/muselab_nanoesp32_s2/mpconfigboard.h
 #: ports/esp32s2/boards/unexpectedmaker_feathers2/mpconfigboard.h
+#: ports/esp32s2/boards/unexpectedmaker_feathers2_prerelease/mpconfigboard.h
 msgid "pressing boot button at start up.\n"
 msgstr ""
 
@@ -3247,7 +3264,7 @@ msgstr ""
 msgid "size is defined for ndarrays only"
 msgstr ""
 
-#: shared-bindings/time/__init__.c
+#: shared-bindings/alarm_time/__init__.c shared-bindings/time/__init__.c
 msgid "sleep length must be non-negative"
 msgstr ""
 
@@ -3263,10 +3280,6 @@ msgstr ""
 msgid "small int overflow"
 msgstr ""
 
-#: main.c
-msgid "soft reboot\n"
-msgstr ""
-
 #: extmod/ulab/code/numerical/numerical.c
 msgid "sort argument must be an ndarray"
 msgstr ""
@@ -3347,6 +3360,10 @@ msgstr ""
 msgid "threshold must be in the range 0-65536"
 msgstr ""
 
+#: ports/esp32s2/common-hal/alarm_time/__init__.c
+msgid "time out of range"
+msgstr ""
+
 #: shared-bindings/time/__init__.c
 msgid "time.struct_time() takes a 9-sequence"
 msgstr ""
@@ -3392,6 +3409,10 @@ msgstr ""
 msgid "trapz is defined for 1D arrays of equal length"
 msgstr ""
 
+#: ports/esp32s2/common-hal/alarm_io/__init__.c
+msgid "trigger level must be 0 or 1"
+msgstr ""
+
 #: extmod/ulab/code/linalg/linalg.c
 msgid "tuple index out of range"
 msgstr ""
@@ -3520,6 +3541,10 @@ msgstr ""
 msgid "vectors must have same lengths"
 msgstr ""
 
+#: ports/esp32s2/common-hal/alarm_io/__init__.c
+msgid "wakeup conflict"
+msgstr ""
+
 #: shared-bindings/watchdog/WatchDogTimer.c
 msgid "watchdog timeout must be greater than 0"
 msgstr ""
diff --git a/main.c b/main.c
index dbd367a5961f6..0aaaa2711bd35 100755
--- a/main.c
+++ b/main.c
@@ -57,6 +57,9 @@
 #include "supervisor/shared/status_leds.h"
 #include "supervisor/shared/stack.h"
 #include "supervisor/serial.h"
+#include "supervisor/usb.h"
+
+#include "shared-bindings/microcontroller/__init__.h"
 
 #include "boards/board.h"
 
@@ -298,6 +301,19 @@ bool run_code_py(safe_mode_t safe_mode) {
         }
     }
 
+    for (uint8_t i = 0; i<=100; i++) {
+        if (!usb_msc_ejected()) {
+            //Go into light sleep
+            break;
+        }
+        mp_hal_delay_ms(10);
+    }
+
+    if (usb_msc_ejected()) {
+        //Go into deep sleep
+        common_hal_mcu_deep_sleep();
+    }
+
     // Display a different completion message if the user has no USB attached (cannot save files)
     if (!serial_connected_at_start) {
         serial_write_compressed(translate("\nCode done running. Waiting for reload.\n"));
@@ -513,7 +529,7 @@ int __attribute__((used)) main(void) {
         }
         if (exit_code == PYEXEC_FORCED_EXIT) {
             if (!first_run) {
-                serial_write_compressed(translate("soft reboot\n"));
+                serial_write_compressed(translate("\n\n------ soft reboot ------\n"));
             }
             first_run = false;
             skip_repl = run_code_py(safe_mode);
diff --git a/ports/atmel-samd/common-hal/microcontroller/__init__.c b/ports/atmel-samd/common-hal/microcontroller/__init__.c
index 09212a0d125a7..f41494b5bfe05 100644
--- a/ports/atmel-samd/common-hal/microcontroller/__init__.c
+++ b/ports/atmel-samd/common-hal/microcontroller/__init__.c
@@ -84,6 +84,10 @@ void common_hal_mcu_reset(void) {
     reset();
 }
 
+void common_hal_mcu_deep_sleep(void) {
+    //deep sleep call here
+}
+
 // The singleton microcontroller.Processor object, bound to microcontroller.cpu
 // It currently only has properties, and no state.
 const mcu_processor_obj_t common_hal_mcu_processor_obj = {
diff --git a/ports/cxd56/common-hal/microcontroller/__init__.c b/ports/cxd56/common-hal/microcontroller/__init__.c
index 7aa3b839d7801..57140dec7041f 100644
--- a/ports/cxd56/common-hal/microcontroller/__init__.c
+++ b/ports/cxd56/common-hal/microcontroller/__init__.c
@@ -81,6 +81,10 @@ void common_hal_mcu_reset(void) {
     boardctl(BOARDIOC_RESET, 0);
 }
 
+void common_hal_mcu_deep_sleep(void) {
+    //deep sleep call here
+}
+
 STATIC const mp_rom_map_elem_t mcu_pin_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_UART2_RXD), MP_ROM_PTR(&pin_UART2_RXD) },
     { MP_ROM_QSTR(MP_QSTR_UART2_TXD), MP_ROM_PTR(&pin_UART2_TXD) },
diff --git a/ports/esp32s2/common-hal/alarm/__init__.c b/ports/esp32s2/common-hal/alarm/__init__.c
new file mode 100644
index 0000000000000..552ad4452bf46
--- /dev/null
+++ b/ports/esp32s2/common-hal/alarm/__init__.c
@@ -0,0 +1,60 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
+ * Copyright (c) 2019 Lucian Copeland 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/alarm/__init__.h"
+#include "shared-bindings/alarm_io/__init__.h"
+#include "shared-bindings/alarm_time/__init__.h"
+
+#include "esp_sleep.h"
+
+void common_hal_alarm_disable_all(void) {
+    esp_sleep_disable_wakeup_source(ESP_SLEEP_WAKEUP_ALL);
+}
+
+mp_obj_t common_hal_alarm_get_wake_alarm(void) {
+    switch (esp_sleep_get_wakeup_cause()) {
+        case ESP_SLEEP_WAKEUP_TIMER: ;
+            //Wake up from timer.
+            alarm_time_obj_t *timer = m_new_obj(alarm_time_obj_t);
+            timer->base.type = &alarm_time_type;
+            return timer;
+        case ESP_SLEEP_WAKEUP_EXT0: ;
+            //Wake up from GPIO
+            alarm_io_obj_t *ext0 = m_new_obj(alarm_io_obj_t);
+            ext0->base.type = &alarm_io_type;
+            return ext0;
+        case ESP_SLEEP_WAKEUP_TOUCHPAD:
+            //TODO: implement TouchIO
+            //Wake up from touch on pad, esp_sleep_get_touchpad_wakeup_status()
+            break;
+        case ESP_SLEEP_WAKEUP_UNDEFINED:
+        default:
+            //Not a deep sleep reset
+            break;
+    }
+    return mp_const_none;
+}
diff --git a/ports/esp32s2/common-hal/alarm_io/__init__.c b/ports/esp32s2/common-hal/alarm_io/__init__.c
new file mode 100644
index 0000000000000..b39693c6af657
--- /dev/null
+++ b/ports/esp32s2/common-hal/alarm_io/__init__.c
@@ -0,0 +1,35 @@
+#include "shared-bindings/alarm_io/__init__.h"
+
+#include "esp_sleep.h"
+#include "driver/rtc_io.h"
+
+mp_obj_t common_hal_alarm_io_pin_state (alarm_io_obj_t *self_in) {
+    if (!rtc_gpio_is_valid_gpio(self_in->gpio)) {
+        mp_raise_ValueError(translate("io must be rtc io"));
+    }
+
+    if (self_in->pull && !self_in->level) {
+        for (uint8_t i = 0; i<=4; i+=2) {
+            if (self_in->gpio == i) {
+                mp_raise_ValueError(translate("IOs 0, 2 & 4 do not support internal pullup in sleep"));
+            }
+        }
+    }
+
+    switch(esp_sleep_enable_ext0_wakeup(self_in->gpio, self_in->level)) {
+        case ESP_ERR_INVALID_ARG:
+            mp_raise_ValueError(translate("trigger level must be 0 or 1"));
+        case ESP_ERR_INVALID_STATE:
+            mp_raise_RuntimeError(translate("wakeup conflict"));
+        default:
+            break;
+    }
+
+    if (self_in->pull) { (self_in->level) ? rtc_gpio_pulldown_en(self_in->gpio) : rtc_gpio_pullup_en(self_in->gpio); }
+
+    return self_in;
+}
+
+void common_hal_alarm_io_disable (void) {
+    esp_sleep_disable_wakeup_source(ESP_SLEEP_WAKEUP_EXT0 | ESP_SLEEP_WAKEUP_EXT1);
+}
diff --git a/ports/esp32s2/common-hal/alarm_time/__init__.c b/ports/esp32s2/common-hal/alarm_time/__init__.c
new file mode 100644
index 0000000000000..252b6e107cdb5
--- /dev/null
+++ b/ports/esp32s2/common-hal/alarm_time/__init__.c
@@ -0,0 +1,13 @@
+#include "esp_sleep.h"
+
+#include "shared-bindings/alarm_time/__init__.h"
+
+void common_hal_alarm_time_duration (uint32_t ms) {
+    if (esp_sleep_enable_timer_wakeup((ms) * 1000) == ESP_ERR_INVALID_ARG) {
+        mp_raise_ValueError(translate("time out of range"));
+    }
+}
+
+void common_hal_alarm_time_disable (void) {
+    esp_sleep_disable_wakeup_source(ESP_SLEEP_WAKEUP_TIMER);
+}
diff --git a/ports/esp32s2/common-hal/alarm_touch/__init__.c b/ports/esp32s2/common-hal/alarm_touch/__init__.c
new file mode 100644
index 0000000000000..df32b269306a3
--- /dev/null
+++ b/ports/esp32s2/common-hal/alarm_touch/__init__.c
@@ -0,0 +1,7 @@
+#include "esp_sleep.h"
+
+#include "shared-bindings/alarm_touch/__init__.h"
+
+void common_hal_alarm_touch_disable (void) {
+    esp_sleep_disable_wakeup_source(ESP_SLEEP_WAKEUP_TOUCHPAD);
+}
diff --git a/ports/esp32s2/common-hal/microcontroller/__init__.c b/ports/esp32s2/common-hal/microcontroller/__init__.c
index 6b2e18673db1d..ab0e1bfaa47cf 100644
--- a/ports/esp32s2/common-hal/microcontroller/__init__.c
+++ b/ports/esp32s2/common-hal/microcontroller/__init__.c
@@ -25,8 +25,8 @@
  * THE SOFTWARE.
  */
 
-#include "py/mphal.h"
 #include "py/obj.h"
+#include "py/mphal.h"
 #include "py/runtime.h"
 
 #include "common-hal/microcontroller/Pin.h"
@@ -41,6 +41,8 @@
 
 #include "freertos/FreeRTOS.h"
 
+#include "esp_sleep.h"
+
 void common_hal_mcu_delay_us(uint32_t delay) {
 
 }
@@ -77,6 +79,10 @@ void common_hal_mcu_reset(void) {
     while(1);
 }
 
+void common_hal_mcu_deep_sleep(void) {
+    esp_deep_sleep_start();
+}
+
 // The singleton microcontroller.Processor object, bound to microcontroller.cpu
 // It currently only has properties, and no state.
 const mcu_processor_obj_t common_hal_mcu_processor_obj = {
diff --git a/ports/esp32s2/mpconfigport.mk b/ports/esp32s2/mpconfigport.mk
index bbaabb1c3defc..a6a4522cf1632 100644
--- a/ports/esp32s2/mpconfigport.mk
+++ b/ports/esp32s2/mpconfigport.mk
@@ -14,6 +14,10 @@ LONGINT_IMPL = MPZ
 
 # These modules are implemented in ports/<port>/common-hal:
 CIRCUITPY_FULL_BUILD = 1
+CIRCUITPY_ALARM = 1
+CIRCUITPY_ALARM_IO = 1
+CIRCUITPY_ALARM_TIME = 1
+CIRCUITPY_ALARM_TOUCH = 1
 CIRCUITPY_ANALOGIO = 0
 CIRCUITPY_AUDIOBUSIO = 0
 CIRCUITPY_AUDIOIO = 0
@@ -22,6 +26,7 @@ CIRCUITPY_FREQUENCYIO = 0
 CIRCUITPY_I2CPERIPHERAL = 0
 CIRCUITPY_ROTARYIO = 0
 CIRCUITPY_NVM = 0
+
 # We don't have enough endpoints to include MIDI.
 CIRCUITPY_USB_MIDI = 0
 CIRCUITPY_WIFI = 1
diff --git a/ports/esp32s2/supervisor/port.c b/ports/esp32s2/supervisor/port.c
index 4290b9bb4a899..be98d94b1f7b2 100644
--- a/ports/esp32s2/supervisor/port.c
+++ b/ports/esp32s2/supervisor/port.c
@@ -34,12 +34,12 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 
-#include "common-hal/microcontroller/Pin.h"
 #include "common-hal/busio/I2C.h"
 #include "common-hal/busio/SPI.h"
 #include "common-hal/busio/UART.h"
-#include "common-hal/pulseio/PulseIn.h"
 #include "common-hal/pwmio/PWMOut.h"
+#include "common-hal/pulseio/PulseIn.h"
+#include "common-hal/microcontroller/Pin.h"
 #include "common-hal/wifi/__init__.h"
 #include "supervisor/memory.h"
 #include "supervisor/shared/tick.h"
diff --git a/ports/litex/common-hal/microcontroller/__init__.c b/ports/litex/common-hal/microcontroller/__init__.c
index 3c91661144b81..e6f50ed5a6abe 100644
--- a/ports/litex/common-hal/microcontroller/__init__.c
+++ b/ports/litex/common-hal/microcontroller/__init__.c
@@ -89,6 +89,10 @@ void common_hal_mcu_reset(void) {
     while(1);
 }
 
+void common_hal_mcu_deep_sleep(void) {
+    //deep sleep call here
+}
+
 // The singleton microcontroller.Processor object, bound to microcontroller.cpu
 // It currently only has properties, and no state.
 const mcu_processor_obj_t common_hal_mcu_processor_obj = {
diff --git a/ports/mimxrt10xx/common-hal/microcontroller/__init__.c b/ports/mimxrt10xx/common-hal/microcontroller/__init__.c
index 6a8537e2da17b..0329ced69b5d9 100644
--- a/ports/mimxrt10xx/common-hal/microcontroller/__init__.c
+++ b/ports/mimxrt10xx/common-hal/microcontroller/__init__.c
@@ -86,6 +86,10 @@ void common_hal_mcu_reset(void) {
     NVIC_SystemReset();
 }
 
+void common_hal_mcu_deep_sleep(void) {
+    //deep sleep call here
+}
+
 // The singleton microcontroller.Processor object, bound to microcontroller.cpu
 // It currently only has properties, and no state.
 const mcu_processor_obj_t common_hal_mcu_processor_obj = {
diff --git a/ports/nrf/common-hal/microcontroller/__init__.c b/ports/nrf/common-hal/microcontroller/__init__.c
index 06aac9409dc1f..9911896bff751 100644
--- a/ports/nrf/common-hal/microcontroller/__init__.c
+++ b/ports/nrf/common-hal/microcontroller/__init__.c
@@ -95,6 +95,10 @@ void common_hal_mcu_reset(void) {
     reset_cpu();
 }
 
+void common_hal_mcu_deep_sleep(void) {
+    //deep sleep call here
+}
+
 // The singleton microcontroller.Processor object, bound to microcontroller.cpu
 // It currently only has properties, and no state.
 const mcu_processor_obj_t common_hal_mcu_processor_obj = {
diff --git a/ports/stm/common-hal/microcontroller/__init__.c b/ports/stm/common-hal/microcontroller/__init__.c
index a827399ccb05f..bc81b0e4f5e90 100644
--- a/ports/stm/common-hal/microcontroller/__init__.c
+++ b/ports/stm/common-hal/microcontroller/__init__.c
@@ -81,6 +81,10 @@ void common_hal_mcu_reset(void) {
     NVIC_SystemReset();
 }
 
+void common_hal_mcu_deep_sleep(void) {
+    //deep sleep call here
+}
+
 // The singleton microcontroller.Processor object, bound to microcontroller.cpu
 // It currently only has properties, and no state.
 const mcu_processor_obj_t common_hal_mcu_processor_obj = {
diff --git a/py/circuitpy_defns.mk b/py/circuitpy_defns.mk
index 76c0a4db6752b..8b32bb5a2464c 100644
--- a/py/circuitpy_defns.mk
+++ b/py/circuitpy_defns.mk
@@ -102,6 +102,18 @@ endif
 ifeq ($(CIRCUITPY_AESIO),1)
 SRC_PATTERNS += aesio/%
 endif
+ifeq ($(CIRCUITPY_ALARM),1)
+SRC_PATTERNS += alarm/%
+endif
+ifeq ($(CIRCUITPY_ALARM_IO),1)
+SRC_PATTERNS += alarm_io/%
+endif
+ifeq ($(CIRCUITPY_ALARM_TIME),1)
+SRC_PATTERNS += alarm_time/%
+endif
+ifeq ($(CIRCUITPY_ALARM_TOUCH),1)
+SRC_PATTERNS += alarm_touch/%
+endif
 ifeq ($(CIRCUITPY_ANALOGIO),1)
 SRC_PATTERNS += analogio/%
 endif
@@ -301,6 +313,10 @@ SRC_COMMON_HAL_ALL = \
 	_bleio/__init__.c \
 	_pew/PewPew.c \
 	_pew/__init__.c \
+	alarm/__init__.c \
+	alarm_io/__init__.c \
+	alarm_time/__init__.c \
+	alarm_touch/__init__.c \
 	analogio/AnalogIn.c \
 	analogio/AnalogOut.c \
 	analogio/__init__.c \
diff --git a/py/circuitpy_mpconfig.h b/py/circuitpy_mpconfig.h
index 0583ae1c97a43..fe1b7a299b7b9 100644
--- a/py/circuitpy_mpconfig.h
+++ b/py/circuitpy_mpconfig.h
@@ -238,6 +238,34 @@ extern const struct _mp_obj_module_t aesio_module;
 #define AESIO_MODULE
 #endif
 
+#if CIRCUITPY_ALARM
+extern const struct _mp_obj_module_t alarm_module;
+#define ALARM_MODULE           { MP_OBJ_NEW_QSTR(MP_QSTR_alarm), (mp_obj_t)&alarm_module },
+#else
+#define ALARM_MODULE
+#endif
+
+#if CIRCUITPY_ALARM_IO
+extern const struct _mp_obj_module_t alarm_io_module;
+#define ALARM_IO_MODULE        { MP_OBJ_NEW_QSTR(MP_QSTR_alarm_io), (mp_obj_t)&alarm_io_module },
+#else
+#define ALARM_IO_MODULE
+#endif
+
+#if CIRCUITPY_ALARM_TIME
+extern const struct _mp_obj_module_t alarm_time_module;
+#define ALARM_TIME_MODULE      { MP_OBJ_NEW_QSTR(MP_QSTR_alarm_time), (mp_obj_t)&alarm_time_module },
+#else
+#define ALARM_TIME_MODULE
+#endif
+
+#if CIRCUITPY_ALARM_TOUCH
+extern const struct _mp_obj_module_t alarm_touch_module;
+#define ALARM_TOUCH_MODULE      { MP_OBJ_NEW_QSTR(MP_QSTR_alarm_touch), (mp_obj_t)&alarm_touch_module },
+#else
+#define ALARM_TOUCH_MODULE
+#endif
+
 #if CIRCUITPY_ANALOGIO
 #define ANALOGIO_MODULE        { MP_OBJ_NEW_QSTR(MP_QSTR_analogio), (mp_obj_t)&analogio_module },
 extern const struct _mp_obj_module_t analogio_module;
@@ -761,6 +789,10 @@ extern const struct _mp_obj_module_t wifi_module;
 // Some are omitted because they're in MICROPY_PORT_BUILTIN_MODULE_WEAK_LINKS above.
 #define MICROPY_PORT_BUILTIN_MODULES_STRONG_LINKS \
     AESIO_MODULE \
+    ALARM_MODULE \
+    ALARM_IO_MODULE \
+    ALARM_TIME_MODULE \
+    ALARM_TOUCH_MODULE \
     ANALOGIO_MODULE \
     AUDIOBUSIO_MODULE \
     AUDIOCORE_MODULE \
diff --git a/py/circuitpy_mpconfig.mk b/py/circuitpy_mpconfig.mk
index 9b9bd83b4d54f..6d6cac0204f51 100644
--- a/py/circuitpy_mpconfig.mk
+++ b/py/circuitpy_mpconfig.mk
@@ -36,6 +36,18 @@ CFLAGS += -DCIRCUITPY_FULL_BUILD=$(CIRCUITPY_FULL_BUILD)
 CIRCUITPY_AESIO ?= 0
 CFLAGS += -DCIRCUITPY_AESIO=$(CIRCUITPY_AESIO)
 
+CIRCUITPY_ALARM ?= 0
+CFLAGS += -DCIRCUITPY_ALARM=$(CIRCUITPY_ALARM)
+
+CIRCUITPY_ALARM_IO ?= 0
+CFLAGS += -DCIRCUITPY_ALARM_IO=$(CIRCUITPY_ALARM_IO)
+
+CIRCUITPY_ALARM_TIME ?= 0
+CFLAGS += -DCIRCUITPY_ALARM_TIME=$(CIRCUITPY_ALARM_TIME)
+
+CIRCUITPY_ALARM_TOUCH ?= 0
+CFLAGS += -DCIRCUITPY_ALARM_TOUCH=$(CIRCUITPY_ALARM_TOUCH)
+
 CIRCUITPY_ANALOGIO ?= 1
 CFLAGS += -DCIRCUITPY_ANALOGIO=$(CIRCUITPY_ANALOGIO)
 
diff --git a/shared-bindings/alarm/__init__.c b/shared-bindings/alarm/__init__.c
new file mode 100644
index 0000000000000..f43c2ea12de95
--- /dev/null
+++ b/shared-bindings/alarm/__init__.c
@@ -0,0 +1,29 @@
+#include "shared-bindings/alarm/__init__.h"
+
+//| """alarm module
+//|
+//| The `alarm` module implements deep sleep."""
+
+STATIC mp_obj_t alarm_disable_all(void) {
+    common_hal_alarm_disable_all();
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(alarm_disable_all_obj, alarm_disable_all);
+
+STATIC mp_obj_t alarm_get_wake_alarm(void) {
+    return common_hal_alarm_get_wake_alarm();
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(alarm_get_wake_alarm_obj, alarm_get_wake_alarm);
+
+STATIC const mp_rom_map_elem_t alarm_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_alarm) },
+    { MP_ROM_QSTR(MP_QSTR_Disable), MP_ROM_PTR(&alarm_disable_all_obj) },
+    { MP_ROM_QSTR(MP_QSTR_get_wake_alarm), MP_ROM_PTR(&alarm_get_wake_alarm_obj) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(alarm_module_globals, alarm_module_globals_table);
+
+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 0000000000000..db3966ac5d28f
--- /dev/null
+++ b/shared-bindings/alarm/__init__.h
@@ -0,0 +1,9 @@
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_ALARM___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_ALARM___INIT___H
+
+#include "py/obj.h"
+
+extern void common_hal_alarm_disable_all(void);
+extern mp_obj_t common_hal_alarm_get_wake_alarm(void);
+
+#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_ALARM___INIT___H
diff --git a/shared-bindings/alarm_io/__init__.c b/shared-bindings/alarm_io/__init__.c
new file mode 100644
index 0000000000000..4e42f9a2e1606
--- /dev/null
+++ b/shared-bindings/alarm_io/__init__.c
@@ -0,0 +1,53 @@
+#include "py/obj.h"
+
+#include "shared-bindings/alarm_io/__init__.h"
+#include "shared-bindings/microcontroller/Pin.h"
+
+//| """alarm_io module
+//|
+//| The `alarm_io` module implements deep sleep."""
+
+STATIC mp_obj_t alarm_io_pin_state(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    enum { ARG_level, ARG_pull };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_level, MP_ARG_INT | MP_ARG_KW_ONLY | MP_ARG_REQUIRED },
+        { MP_QSTR_pull, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_bool = false} },
+    };
+
+    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);
+
+    mcu_pin_obj_t *pin = validate_obj_is_pin(pos_args[0]);
+    alarm_io_obj_t *self = m_new_obj(alarm_io_obj_t);
+
+    self->base.type = &alarm_io_type;
+    self->gpio = pin->number;
+    self->level = args[ARG_level].u_int;
+    self->pull = args[ARG_pull].u_bool;
+
+    return common_hal_alarm_io_pin_state(self);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_KW(alarm_io_pin_state_obj, 1, alarm_io_pin_state);
+
+STATIC mp_obj_t alarm_io_disable(void) {
+    common_hal_alarm_io_disable();
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(alarm_io_disable_obj, alarm_io_disable);
+
+STATIC const mp_rom_map_elem_t alarm_io_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_alarm_io) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_PinState), MP_ROM_PTR(&alarm_io_pin_state_obj) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_Disable), MP_ROM_PTR(&alarm_io_disable_obj) },
+};
+STATIC MP_DEFINE_CONST_DICT(alarm_io_module_globals, alarm_io_module_globals_table);
+
+const mp_obj_module_t alarm_io_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&alarm_io_module_globals,
+};
+
+const mp_obj_type_t alarm_io_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_ioAlarm,
+};
diff --git a/shared-bindings/alarm_io/__init__.h b/shared-bindings/alarm_io/__init__.h
new file mode 100644
index 0000000000000..0a53497c01f3e
--- /dev/null
+++ b/shared-bindings/alarm_io/__init__.h
@@ -0,0 +1,17 @@
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_IO___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_IO___INIT___H
+
+#include "py/runtime.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    uint8_t gpio, level;
+    bool pull;
+} alarm_io_obj_t;
+
+extern const mp_obj_type_t alarm_io_type;
+
+extern mp_obj_t common_hal_alarm_io_pin_state (alarm_io_obj_t *self_in);
+extern void common_hal_alarm_io_disable (void);
+
+#endif //MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_IO___INIT___H
diff --git a/shared-bindings/alarm_time/__init__.c b/shared-bindings/alarm_time/__init__.c
new file mode 100644
index 0000000000000..1707f7488f342
--- /dev/null
+++ b/shared-bindings/alarm_time/__init__.c
@@ -0,0 +1,50 @@
+#include "py/obj.h"
+#include "shared-bindings/alarm_time/__init__.h"
+
+//| """alarm_time module
+//|
+//| The `alarm_time` module implements deep sleep."""
+
+STATIC mp_obj_t alarm_time_duration(mp_obj_t seconds_o) {
+    #if MICROPY_PY_BUILTINS_FLOAT
+    mp_float_t seconds = mp_obj_get_float(seconds_o);
+    mp_float_t msecs = 1000.0f * seconds + 0.5f;
+    #else
+    mp_int_t seconds = mp_obj_get_int(seconds_o);
+    mp_int_t msecs = 1000 * seconds;
+    #endif
+
+    if (seconds < 0) {
+        mp_raise_ValueError(translate("sleep length must be non-negative"));
+    }
+    common_hal_alarm_time_duration(msecs);
+
+    alarm_time_obj_t *self = m_new_obj(alarm_time_obj_t);
+    self->base.type = &alarm_time_type;
+
+    return self;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(alarm_time_duration_obj, alarm_time_duration);
+
+STATIC mp_obj_t alarm_time_disable(void) {
+    common_hal_alarm_time_disable();
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(alarm_time_disable_obj, alarm_time_disable);
+
+STATIC const mp_rom_map_elem_t alarm_time_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_alarm_time) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_Duration), MP_ROM_PTR(&alarm_time_duration_obj) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_Disable), MP_ROM_PTR(&alarm_time_disable_obj) },
+};
+STATIC MP_DEFINE_CONST_DICT(alarm_time_module_globals, alarm_time_module_globals_table);
+
+const mp_obj_module_t alarm_time_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&alarm_time_module_globals,
+};
+
+const mp_obj_type_t alarm_time_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_timeAlarm,
+};
diff --git a/shared-bindings/alarm_time/__init__.h b/shared-bindings/alarm_time/__init__.h
new file mode 100644
index 0000000000000..a96383069339b
--- /dev/null
+++ b/shared-bindings/alarm_time/__init__.h
@@ -0,0 +1,15 @@
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_TIME___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_TIME___INIT___H
+
+#include "py/runtime.h"
+
+typedef struct {
+    mp_obj_base_t base;
+} alarm_time_obj_t;
+
+extern const mp_obj_type_t alarm_time_type;
+
+extern void common_hal_alarm_time_duration (uint32_t);
+extern void common_hal_alarm_time_disable (void);
+
+#endif //MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_TIME___INIT___H
diff --git a/shared-bindings/alarm_touch/__init__.c b/shared-bindings/alarm_touch/__init__.c
new file mode 100644
index 0000000000000..5f5a156d8012c
--- /dev/null
+++ b/shared-bindings/alarm_touch/__init__.c
@@ -0,0 +1,28 @@
+#include "py/obj.h"
+#include "shared-bindings/alarm_touch/__init__.h"
+
+//| """alarm_touch module
+//|
+//| The `alarm_touch` module implements deep sleep."""
+
+STATIC mp_obj_t alarm_touch_disable(void) {
+    common_hal_alarm_touch_disable();
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(alarm_touch_disable_obj, alarm_touch_disable);
+
+STATIC const mp_rom_map_elem_t alarm_touch_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_alarm_touch) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_Disable), MP_ROM_PTR(&alarm_touch_disable_obj) },
+};
+STATIC MP_DEFINE_CONST_DICT(alarm_touch_module_globals, alarm_touch_module_globals_table);
+
+const mp_obj_module_t alarm_touch_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&alarm_touch_module_globals,
+};
+
+const mp_obj_type_t alarm_touch_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_touchAlarm,
+};
diff --git a/shared-bindings/alarm_touch/__init__.h b/shared-bindings/alarm_touch/__init__.h
new file mode 100644
index 0000000000000..600587d247e2c
--- /dev/null
+++ b/shared-bindings/alarm_touch/__init__.h
@@ -0,0 +1,14 @@
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_TOUCH___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_TOUCH___INIT___H
+
+#include "py/runtime.h"
+
+typedef struct {
+    mp_obj_base_t base;
+} alarm_touch_obj_t;
+
+extern const mp_obj_type_t alarm_touch_type;
+
+extern void common_hal_alarm_touch_disable (void);
+
+#endif //MICROPY_INCLUDED_SHARED_BINDINGS_ALARM_TOUCH___INIT___H
diff --git a/shared-bindings/microcontroller/__init__.c b/shared-bindings/microcontroller/__init__.c
index 2e58bdcc290f0..bbc1640f76146 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
@@ -136,6 +135,13 @@ STATIC mp_obj_t mcu_reset(void) {
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_0(mcu_reset_obj, mcu_reset);
 
+STATIC mp_obj_t mcu_sleep(void) {
+    common_hal_mcu_deep_sleep();
+    // We won't actually get here because mcu is going into sleep.
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(mcu_sleep_obj, mcu_sleep);
+
 //| nvm: Optional[ByteArray]
 //| """Available non-volatile memory.
 //| This object is the sole instance of `nvm.ByteArray` when available or ``None`` otherwise.
@@ -171,6 +177,8 @@ STATIC const mp_rom_map_elem_t mcu_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_enable_interrupts), MP_ROM_PTR(&mcu_enable_interrupts_obj) },
     { MP_ROM_QSTR(MP_QSTR_on_next_reset), MP_ROM_PTR(&mcu_on_next_reset_obj) },
     { MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&mcu_reset_obj) },
+    //ToDo: Remove MP_QSTR_sleep when sleep on code.py exit implemented.
+    { MP_ROM_QSTR(MP_QSTR_sleep), MP_ROM_PTR(&mcu_sleep_obj) },
     #if CIRCUITPY_INTERNAL_NVM_SIZE > 0
     { MP_ROM_QSTR(MP_QSTR_nvm),  MP_ROM_PTR(&common_hal_mcu_nvm_obj) },
     #else
diff --git a/shared-bindings/microcontroller/__init__.h b/shared-bindings/microcontroller/__init__.h
index 8abdff763c1ff..f5bcfaa08a5f1 100644
--- a/shared-bindings/microcontroller/__init__.h
+++ b/shared-bindings/microcontroller/__init__.h
@@ -28,8 +28,8 @@
 #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"
 
@@ -43,6 +43,8 @@ extern void common_hal_mcu_enable_interrupts(void);
 extern void common_hal_mcu_on_next_reset(mcu_runmode_t runmode);
 extern void common_hal_mcu_reset(void);
 
+extern void common_hal_mcu_deep_sleep(void);
+
 extern const mp_obj_dict_t mcu_pin_globals;
 
 extern const mcu_processor_obj_t common_hal_mcu_processor_obj;