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Hibernation is not making ESP32 to wake-up again if board is unplugged from power #37

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waged opened this issue Dec 29, 2020 · 3 comments

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@waged
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waged commented Dec 29, 2020

Have done the last example of hibernation in the sleep modes and found interesting behavior.
1-ESP32 works without power in hibernation for 30 seconds.
2-during the 30 seconds if i connect the power again it wakes-up and perform normal.
3-if i connect the power after the 30 seconds have passed, i find that board cannot wake-up or even restart. it only works again if i force reset it with the board RST button. (any solution to let the board work properly from hibernation?)

@Mair
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Mair commented Jan 18, 2021

What dev board are you using. I have found that some dev boards have some strange management around how they manage the battery and actually reset the chip when you plug it in-out.

@waged
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waged commented Jan 18, 2021

I'm using the ESP32-WROVER KIT, the behavior is super annoying as the i wakeup with both timer and a user reset sw on interrupt, if battery died during sleeping mode, the ESP32 cannot wake up until controller reset button pressed and it's not applicable for my use case.

@Mair
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Mair commented Jan 18, 2021

Yeah that is annoying but, I think its board related. Have you asked anyone on https://esp32.com/ There might be a solution there

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