I am working on this board for a project at school.
It is a very simple question but maybe I am doing something wrong on my setup.
I would like to use 4 digital outputs and 3 analog inputs.
For the 4th digital, I am using pin 1 (RX). I dont use serial.print(). And I have nothing wired to pin 1 while uploading my sketch. Still, RX won't work as digital output, even after pinMode(1,OUTPUT).
Any suggestion what to try next?
Thanks in advance