IO25 Issue when using External RTC 32.768kHz Crystal

[dovov97815]

Hello,

I am using Arduino V1.0.6 SDK With ESP32 WROOM 32.
I am currently facing issue of false interrupt in deep sleep on IO25, when external crystal is used.

Is IO25 Used for external crystal debugging, or frequency output?
how to disable this functionality, and use IO25 as interrupt to wakeup from deepsleep of ESP32.

Thank You

[ESP_LJH]

I have never heard about this problem. What is the interrupt figure measured from IO25, could you show me? If because IO25 is close to IO32 IO33 and is affected due to some coupling effect? If you add some external resistor to set a strong initial state to prevent noise?

[dovov97815]

I am using https://gist.github.com/nevercast/1cc2e ... 013890992f
link.

I am facing issue due to debug of crystal output on DAC1 (IO25), but I didn't know the cause and solution for this.