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Issues with BlueNRG-M2SA UART and STM32L053R8T6 LPUART Communication

kingdomy
Associate

‎2025-03-25 7:07 PM - last edited on ‎2025-03-26 1:55 AM by

I have configured the hardware to use BlueNRG-M2SA(DIO4, DIO5) with STM32L053R8T6 via LPUART1(PB10, PB11).

kingdomy_1-1742947675287.pngㅌ

The connections are as follows:

  • M2SA DIO4(UART_RXD) <-> CPU PB10(LPUART1_TX)

  • M2SA DIO5(UART_TXD) <-> CPU PB11(LPUART1_RX)

  • RESETN is pulled up to 3.3V via a hardware pull-up

 

To verify the hardware setup, I set the LPUART1 baud rate to 115200 and sent the HCI_Send_Reset(HCI command) to the M2SA. However, I am not receiving any response.

kingdomy_0-1742947459026.png

I have confirmed that the LPUART1 transmit/receive functions work correctly when tested separately from the M2SA module.

Are there any specific hardware configurations required to enable UART communication with the M2SA?

Any guidance would be greatly appreciated.

 

 

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