esp32: Add esp32.wake_on_gpio. #17518
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Some boards support waking up via GPIO pins, but this is not currently supported by MicroPython. This commit adds support for waking with GPIO in a similar interface to waking with ext0, ext1, touch and ulp. This commit adds documentation for this new function as well. Signed-off-by: Meir Armon <[email protected]>
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@dpgeorge as specified in the description, this is a feature request that is very long standing (several years at least). I think that my implementation should satisify your standards, and if it does, I would appreciate serious consideration and merging this for the next release. Thank you for maintaining MicroPython and all of your hard work :-) |
This was referenced Jun 20, 2025
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Summary
Some boards support waking up from deepsleep via GPIO pins (for instance ESP32C3, ESP32C6), but this is not currently supported by MicroPython. This commit adds support for waking with GPIO in a similar interface to waking with ext0, ext1, touch and ulp. This commit adds documentation for this new function as well.
This is a long standing request, with a lot of chatter online. Over the years there have been several attempts to add this (#15498, #13333 and #9583), but with no success. I also explain below why my approach is better (it is based on the existing PRs, so thanks to @m-cas, @puppet13th and @ondiiik).
Testing
Tested ESP32_GENERIC_C3with:
and checked that the relevant pins wake up from deepsleep.
Trade-offs and Alternatives
The existing PRs mentioned above modify
wake_on_ex1, testing if the port is specifically ESP32C3. My solution adds awake_on_gpiowhich is a similar interface, and tests for the SOC capabilities.