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28 files
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● updated 3mo ago1.8.4 · 2026-03-27★ 24513 open issues
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README
Adafruit SleepyDog Arduino Library 
Arduino library to use the watchdog timer for system reset. Also provides simple API access for entering/exiting from low power sleep modes.
Supported Platforms
| Support Level | Platform / Board Family | MCU(s) | Notes / Caveats |
|---|---|---|---|
| Full | Raspberry Pi Pico | RP2040, RP2350 | — |
| Full | ESP32 Family | ESP32, ESP32-S2, ESP32-S3 | — |
| Limited | ESP8266 | ESP8266 | Software and hardware watchdog timers are fixed-interval and not programmable. See utility/WatchdogESP8266.cpp. |
| Full | Arduino Uno / ATmega328P Boards | ATmega328P | — |
| Full | Arduino Mega | ATmega2560, ATmega1280 | — |
| Full | Arduino Zero / Adafruit Feather M0 | ATSAMD21 | — |
| Full | Adafruit Feather M4 | ATSAMD51 | — |
| Full | Arduino Leonardo / 32u4 Boards | ATmega32u4 | USB Serial is disabled during sleep. Logic continues running but Serial appears frozen. Restore after wake with USBDevice.attach(); and reconnect from host. |
| Full | ATtiny Series | ATtiny24/44/84, ATtiny25/45/85 | — |
| Partial | Teensy 3.x / LC | Teensy 3.x, LC | Watchdog supported; sleep not supported. |
Core symbols most depended-on inside this repo
rosc_write
called by 14
utility/WatchdogRP2350/hardware_rosc/include/hardware/rosc.h
sleep_run_from_xosc
called by 4
utility/WatchdogRP2350/pico_sleep/include/pico/sleep.h
processor_deep_sleep
called by 3
utility/sleep.c
powman_clear_bits
called by 3
utility/hardware/powman.h
sleep_run_from_dormant_source
called by 3
utility/WatchdogRP2350/pico_sleep/sleep.c
processor_deep_sleep
called by 3
utility/WatchdogRP2350/pico_sleep/sleep.c
sleep_goto_dormant_until_pin
called by 3
utility/WatchdogRP2350/pico_sleep/sleep.c
watchdog_config
called by 2
utility/WatchdogKinetisK.cpp
Shape
Languages
C++74%
C26%
Modules by API surface
utility/hardware/powman.h11 symbols
utility/WatchdogRP2350/WatchdogRP2350.cpp11 symbols
utility/WatchdogRP2350.cpp11 symbols
utility/sleep.c10 symbols
utility/WatchdogRP2350/pico_sleep/sleep.c10 symbols
utility/rosc.c8 symbols
utility/WatchdogRP2350/hardware_rosc/rosc.c8 symbols
utility/WatchdogSAMD.cpp7 symbols
utility/WatchdogRP2350/pico_sleep/include/pico/sleep.h6 symbols
utility/WatchdogKinetisK.cpp6 symbols
utility/WatchdogAVR.cpp6 symbols
utility/WatchdogNRF.cpp5 symbols
For agents
$ claude mcp add Adafruit_SleepyDog \
-- python -m otcore.mcp_server <graph>