Is anyone else running V2.6? Is serial config working ok for you? I can replicate the issue, we have been using it in the factory for some time now to set node ID.
emonTx V3 firmware now allows the RF settings (nodeID, freq, group) to be configured via serial. Settings are saved to EEPROM and persistent between power cycles.
Update: these changes have now been released FW V:2.6+
Enter ‘+++’ then [Enter] during the POST (Power-On Self-Test) 10s delay during startup to enter config:
Note: Ensure serial monitor is set to NL/CR and the Baud Rate set to 115200*. Arduino IDE serial monitor may need to be restarted after changing the line ending selection.
*…