USART1 (PA9-D8/PA10-D2) on Nucleo-WB15CC not working for serial comms

[saurabhc]

I'm working with a NUCLEO-WB15CC board (MB1641C-01) and am trying to use three independent serial ports for my project.

I have found that the D8 and D2 pins on the board are not working for serial communication. I believe this is due to a pin conflict with the on-board ST-LINK debugger, as a table in the board's documentation shows PA9 and PA10 are routed through jumpers to the ST-LINK (JP5 pins 13-14 and 15-16).

My question to the community is whether D8 and D2 pins are indeed unavailable for user applications due to the ST-LINK routing.

Thank you for your help.

[TDK]

If you disconnect PA9/PA10 from the ST-Link by removing the bottom two jumpers on JP5, they will be available for use. You will, of course, lose VCP functionality.