GPIO0 as ADC

[kamesh]

Hi,
As GPIO0 is a boot strapping pin can it be used as ADC?

[ESP_Sprite]

The only requirement for a bootstrap pin is that it has the right signal when the ESP32 boots/resets. If you can guarantee that, there's nothing stopping you from coming up with a circuit that also uses it as an ADC pin.

[ESP_igrr]

Also, keep in mind that GPIO2 is an ADC2 pin. ADC2 is not supported in ESP-IDF yet (although there is a PR made by Rudi which adds this support, which you can use as long as you don't use WiFi).