ESP32 Forum

Hello, I can't find answer for my problem, so I'm starting my first topic here.

I have got custom made board with ESP32-C3-Mini, where is controll of the external motor connected to UART TX pin (GPIO 21) .
I'm able to reconfigure the pin after bootloader start (with bootloader_before_init() hook), but there is still some time which spins the motor at power up. I would like to pernamently disable UART and that pull-up, which spins the motor.

Is it possible to change default GPIO matrix (or UART setup) on esp32, which will be pernament and immediately after power up?

You can make the TX pin not send any serial data, but I don't think you can change the fact that it's at a high level after power-up.

Thank you for your answer.
Is it set by Pull-Up or by logic value? Can I connect Pull-Down resistor directly on this pin?
If it is only pull-up, I can at least lower it by some external resistor and then set it to low.

I'm decently sure it's logical value.