I have a RAK3172 which was working but now will not accept any RUI3 commands. Any commands like AT+BOOT return “AT Not Support”. The RAK3172 is connected to a computer using a USB to RS232 dongle. The AT+VERSION command returns RUI_BOOT_0.8_STM32WLE5CC I can no longer flash programs using the Arduino IDE or any of your tools. The WisToolBox does not recognize the device and “RAK Device Firmware Upgrade Tool” fails when trying to upgrade the firmware. Any ideas?
Welcome to RAK forum @RandyB ,
Can you to send AT+RUN? It seems you are in bootloader mode.
When you send that, you will receive a Stop Boot Mode reply and you can send AT commands again to your RAK3172.
That returns “Stop Boot Mode”
“Jump failed. No legal application detected.” I still can’t issue AT commands
You can reupload the whole RAK3172 FW.
You can follow this guide on how to do it using STM32CubeProgrammer. Your module has established UART communication so you can upload the hex via UART without needing external tools.
That worked. Thanks for your help and quick response 