Thank you Tesla DeLorean.Actually, I think it is an issue of me having never worked with Arduino (as I said) and the NUCLEO pin-out documentation not being quite as clear as St Micro perhaps intended.Thank you for your help.

Thank you. I understand what the schema and documentation is presenting.The NUCLEO board documentation is assuming the reader has knowledge of the Arduino. A few well chosen words on the documentation would have saved hours of pain. I am new to St Mi...

Thank you for the board schematic. I have had a good look, but I don't see an answer to my question.

Oops! I missed that paragraph when pasting my question. Sorry.I have the NUCLEO-L4A6ZG board and I am configuring UART4 which should provide UART4-TX on PA0 (CN9 pin 1) and UART4-RX on PA1 (CN9 pin3).I have just discovered that according to the STM32...