cmwx1zzabz_0xx project on B-L072Z-LRWAN1 discovery board: serial console question

[CCP]

I've built cmwx1zzabz_0xx project on B-L072Z-LRWAN1 discovery board. From the source code, it looks like the app configures a 9600 baud serial console using UART1 on the STM32LO72 on the MuRata LoRa module.

Please confirm that the TX/RX signals are available at PA9 and PA10 on the discovery board's pin header.

Which #defines are necessary to route app console logging as well as AT command responses to this console?

Thanks,

Curtis

[Andrew Neil]

You should be able to check this in the User Manual and/or the Schematics, available on theboard's Product Page:

• User Manual is on the 'Documentation' tab:
  https://www.st.com/en/evaluation-tools/b-l072z-lrwan1.html#documentation
   
  
  
• Schematics on the 'CAD Resources' tab:
  https://www.st.com/en/evaluation-tools/b-l072z-lrwan1.html#cad-resources

[CCP · Accepted solution]

I was mistaken. The app configures a 9600 baud serial console on lpuart1, using pins PA2 and PA3, which are connected through SB28 and SB29 to the STM that implements ST-Link including its virtual serial port. On my board SB28 and SB29 were open. Once I bridged them I was able to open a Putty session to the virtual comport provided by ST-Line and see console output and enter AT commands.