could anyone tell me which one is pin 2 on the extension header? Near the power connector or at the opposite side? At the upper (toward me when i look at it) column or at the column toward the board?
Acording to STM32-Primer2 User Manual pin 2 is indicated with white lite (closer to PCB) and pin 1 is siting on top of it (if you are looking at the bottom side of PCB). I know one thing for sure: USART TX, USART RX and both ground pins are closer to PCB surface.