Problem with interrupt wdt causing problems when in sleep mode

[XanCraft21]

Hello, i have been having problems with the sleep functions, and it affects both light and deep sleep modes.

The interrupt watchdog timer keeps crashing the esp every time after entering sleep mode with repeated software resets until a power on reset happens.

There seems to be absolutely no info online about how to disable the interrupt watchdog for Arduino and it’s important that i find a way how to disable the timer. I’ve tried many different things and still no luck.

If any of the workers developers or contributors know how i can disable this please let me know. I need to know how to disable it because i am working on a major project that requires at least light sleep mode for battery power saving.

[mrengineer7777]

Can you run this example without crashing? https://github.com/espressif/arduino-esp32/blob/master/libraries/ESP32/examples/DeepSleep/TimerWakeUp/TimerWakeUp.ino

[mrengineer7777]

Ah so the problem may have nothing to do with Sleep. Try creating a simple project that replicates the crash when using the interrupt pin. If you can duplicate it, post it in an issue.

[XanCraft21]

Ok, i will do that when i can. Thank you. Will it be ok if i post it as a gist?

[mrengineer7777]

A gist would be good. You can create an issue here: https://github.com/espressif/arduino-esp32/issues

[XanCraft21]

Thank you. I will begin working on that.

[XanCraft21]

Unfortunately i can’t replicate the bug, the entire deep sleep control software is buggy.

i don’t get the interrupt bug, but there are some other bugs i found. If the gpio level to wake up is set to low, the chip instantly wakes up as soon as it goes to sleep, but if i set the level to high it never wakes up even if i keep the pin powered with the correct voltage polarity.

the first but i was having with the watchdog timer uses the normal setup but a different interrupt that is not being triggered.

I tested the sleep on the normal esp32 board, but i tested it first on a different board.

The other board is the Lilygo watch v2 and it seems hard to make software for it since the software that lilygo made sucks badly. And there is a full OS that already exists but it sucks even worse.

[27rabbitlt]

Not sure if we are facing the same problem. But the phenomenon is basically the same.

Everytime when esp board try to execute esp_deep_sleep_start, it will be woken up by Interrupt Watchdog, the wakeup cause is 0 (ESP_SLEEP_WAKEUP_UNDEFINED), and the reset reason is 5 (ESP_RST_INT_WDT).

I tried the demo suggested by @mrengineer7777 https://github.com/espressif/arduino-esp32/blob/master/libraries/ESP32/examples/DeepSleep/TimerWakeUp/TimerWakeUp.ino and the demo works perfectly fine.

The only difference is that I missed the Serial.flush(). When I flushed the buffer of Serial, and then goto deep sleep, the problem is solved magically.