Serial Debugging can be used as a diagnostic tool for advanced troubleshooting of the MULTI-Module.
Step 1: Upload a serial debugging firmware build to your MULTI-Module.
iRangeX, Banggood, older Jumper JP4IN1
If you have to unplug or power-cycle the module, you must close and re-open the serial monitor within 30s.
Newer Jumper JP4IN1
If you have to unplug or power-cycle the module, turn the radio on with the USB cable unplugged from the computer, then plug the cable in once the module has started (red LED is on),
Any module with an external USB-to-serial adapter
If you disconnect the USB-to-serial adapter from the computer you must close and re-open the serial monitor.
Step 2: Run Flash Multi (see the Firmware Update Methods page) and open the Serial Monitor.
Step 3: Read the output, copy and paste, or save it to a file