RUI3 - RXD1 & TXD1 as GPIO

RUI
1

Can RXD1 and TXD1 on the RAK19007+RAK4631-R be used as general purpose IO pins?

It seems like something in the RUI3 firmware is forcing them to be a Serial port.

2

Welcome to the forum @dman66
You can’t use them as GPIO, they are fixed to UART function by RUI3.