Has anyone had any luck using the USART on the Baby O? I successfully made the light blink but I seem to be having problems using the USART… does the use of PD1 (which is also the TX pin for the USART) as a driver for the LED inhibit serial comms?
I’m not sure what you mean about “the use of PD1”. If you want to use the UART, you won’t be able to also use the pin as a straight digital line. The LED being on the line shouldn’t affect the UART; If you have the UART set up correctly, you should see the LED on when you are idle, and the LED should flicker as you send data.