Thanks. I've unplugged everything and just checked the 3.3V pin, and indeed it was providing 3.3V. Rechecking the voltage at the GPIO, it's properly showing 3.3V now. I'm not sure why it was close to 2.7V previously. I'm not trying to power a chip, I'm just plugged to the GPIO of another board. One ...

Hi

I have a esp32 devkit1. I'm using the GPIO 4 (BIT4 in my program) to control something that expects 3.3V. The devkit1 is just powered by USB.

It seems the output is quite low sometimes, like 2.7V.

Are all GPIOs outputting the same voltage?

Is my board defective or is this usual?

Thanks.