Rak3172 firmware upgrade timeout!

[Flume (Phil)]

Follow this thread. I finally let me talk to the RAK3172. Just need to upload this firmware on this link.

Rak 3272S-Board RUI3 Arduino programming board

I am not sure what happened. If the baudrate is set at 11200, UART2-COM port ok and jumpers wires 100% solid but still got no replies, let’s proceed on uploading the HEX firmware file to get a fresh module working. Please upload this firmware (.hex) using STCubeProgrammer then you can try again sending AT commands to UART2.