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Dadhichee_19
Explorer
March 5, 2025
Solved

how to use UART2 independently - isolated from ST link. STM32103RB

  • March 5, 2025
  • 2 replies
  • 596 views

i have STM32103RBT6, i want to use all three UARTs for a project. i want to use UART2 thorugh PA2 and PA3. 

The connection are : SB61, SB62 and SB63 are open. SB13 & SB14 are open as well. Continuity is there between SB62 & SB62 to TX on ST link (from track side) & between SB63 to RX on ST link (from track side). No continuity between  PA2 and PA3 with SB13 & SB14. can anyone tell me how to use UART2 from the PA2 and PA3? i want to use it for modbus but the transmission is failing. 

    This topic has been closed for replies.
    Best answer by mƎALLEm

    It seems you are using NUCLEO-F103RB.

    And this is what is said in the user manual UM1724:

    mALLEm_0-1741160580877.png

     

    2 replies

    M
    mƎALLEm
    Technical Moderator
    March 5, 2025

    Hello,

    You didn't mention which board you are using!

    And this is not related to CubeIDE. The post need to be moved to hardware boards forum board.

      M
      mƎALLEmAnswer
      Technical Moderator
      March 5, 2025

      It seems you are using NUCLEO-F103RB.

      And this is what is said in the user manual UM1724:

      mALLEm_0-1741160580877.png

       

        D
        Dadhichee_19Author
        Explorer
        March 5, 2025

        Thank you so much my friend. Big help here. sometimes we overlook highlighted details. Thanks

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