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Dadhichee_19
Associate
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. 

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

mƎALLEm
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.

"To give better visibility on the answered topics, please click on ""Accept as Solution"" on the reply which solved your issue or answered your question."
    mƎALLEm
    mƎALLEmBest answer
    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

     

    "To give better visibility on the answered topics, please click on ""Accept as Solution"" on the reply which solved your issue or answered your question."
      D
      Dadhichee_19Author
      Associate
      March 5, 2025

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

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