By diy
#12541
I'm stumped. I'm looking to do some debugging using the on-board LED while connected to Bluetooth. However, I am not sure how and have not found docs indicating which pin the LED is connected to.. I've tried digitalWrite to all digital pins (0 and up, including the standard Uno pin #13). Even tried all analog pins. I can see the RX/TX and even pwr LEDs blink when uploading sketches, so I know the LEDs are good. What am I missing? Should I not be able to blink either the RX/TX if writing to D0/1?