I'm working with a nucleo board f401re and I want to use the usart 6 through PC6 (tx) and PC7 (rx). I'm connected to the D15 and D9 board pin respectively. I correctly initializate the peripheral but it doesn't work. Any advise?

[waclawek.jan]

PC6 is not brought out to the Arduino connector (i.e. it is NOT D15), only to the Morpho connector CN10 (just opposite to PB8, which actually *is* D15).

JW