V2.6.0 | Serial RF config

Update to the emonTx V3 firmware that allows the RF settings (nodeID, freq, group) to be configured via serial. Settings are saved to EEPROM and persistent between power cycles.

https://community.openenergymonitor.org/t/emontx-configure-rf-settings-via-serial-dev/2064

V2.5.0 | emonESP serial compatible

See Change Log.

V2.3.0 | Change to unsigned long for pulse count

See Change Log.