Hold digital pin state in sleep mode?

[m5er]

Can anyone provide a working C++ example how to hold a digital output pin HIGH during ESP32 deep sleep? Thanks!

[m5-docs]

Hello @m5er "Deep-sleep mode: Only RTC is powered on. Wi-Fi and Bluetooth connection data are stored in RTC
memory. The ULP-coprocessor can work" I think that it means the clock which drives GPIOs will sleep as well.

[ajb2k3]

@m5er said in Hold digital pin state in sleep mode?:

Can anyone provide a working C++ example how to hold a digital output pin HIGH during ESP32 deep sleep? Thanks!

You need to look into the ULP for that as both cores of the esp are inactive during deep sleep

[m5er]

Thank you @watson and @ajb2k3. I did look into the documentation before asking this question, but it wasn't very clear to me how to put this into practice. That is why my question asked for a working example. I will still appreciate if someone could post that.

[ajb2k3]

@m5er That is part of the problem, the ULP is not well documented and everyone is struggling with it