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

Dadhichee_19 · ‎2025-03-04

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.

mƎALLEm · ‎2025-03-04

It seems you are using NUCLEO-F103RB.

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

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.

View solution in original post

mƎALLEm · ‎2025-03-04

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 · ‎2025-03-04

It seems you are using NUCLEO-F103RB.

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

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.

Dadhichee_19 · ‎2025-03-05

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