Hi,
thanks for replying.
I know the TTN Uno is more Leonardo and I’ve swicthed between the two in the Arduino IDE when compiling for each board.
Looking at the Leonardo, it seems to suggest the USB serial port is also available on pins 0 and 1. However, it doesn’t seem to work for me.
On the TTN Uno, Serial1 is I believe, the serial interface to the Lora module.
Just wondering if I’ve managed to break my pin0/1 I/Os. I did try to use them as outputs when driving LEDs (while also having Serial outputs).