Skip to main content
K
KJase.1
Visitor II
April 21, 2023
Solved

UART2 on the Nucleo G431-RB accepts data through the USB virtual port but not through PA3.

  • April 21, 2023
  • 4 replies
  • 1812 views

Hi all, I am working in uart2 which is connected to the usb port in nucleo -g431rb but I want to communicate not through usb but through PA2 and PA3 pins assigned to uart2 by default. Tx line work properly but Rx not. There is a good signal on PA3 input (I checked with oscilloscope) but MCU is not receiving data. I thought there was some collision with usb virtual port so I unsoldered solder bridges SB1 and SB12 - doesn't work. Rx uart2 works if I send data to usb port and not to PA3. Does anyone have any idea?

    This topic has been closed for replies.
    Best answer by Karl Yamashita

    I am assuming you're using pin #5 and #10(ARD_A2) on CN3 connector? The ARD_A2 needs SB14 soldered bridge to complete the circuit.

    4 replies

    K
    Karl YamashitaAnswer
    Graduate II
    April 21, 2023

    I am assuming you're using pin #5 and #10(ARD_A2) on CN3 connector? The ARD_A2 needs SB14 soldered bridge to complete the circuit.

    K
    KJase.1Author
    Visitor II
    April 21, 2023

    Many thanks, I'll check tomorrow.

    K
    KJase.1Author
    Visitor II
    April 25, 2023

    Now it works, thanks again.

    K
    Karl Yamashita
    Graduate II
    April 26, 2023

    That is good to hear. Can you select as best answer?

    Terms & ConditionsAccessibility statement