I was messing around with this project from a HA user and added a modification (zigbee2mqtt) to enable device mappings for Domoticz/zigbee2mqtt. So far works OK.
There is a "mitsubishi_hp.js" which has instructions of where to put it in the comments. Then build up the hardware, pair it and it will appear in z2m and later in Domoticz using the same selector switch values as the "Mitsubishi Heat Pump MQTT Interface Plugin" so they can simply be replaced in the Domoticz interface so all your scripts should keep working as normal.
https://github.com/peterashwoodsmith/HeatPumpHAserial
Mitsubishi Heatpump to zigbee2mqtt/Domoticz Auto Discovery
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solarboy
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Mitsubishi Heatpump to zigbee2mqtt/Domoticz Auto Discovery
Intel NUC with Ubuntu Server VM (Proxmox),mosquitto(docker),RFXtrx433E,zwavejsUI (docker),Zigbee2mqtt(docker),Harmony Hub plugin, Kodi plugin,Homebridge(docker)+Google Home,APC UPS,SMA Modbus,Mitsubishi MQTT, Broadlink,Dombus
Re: Mitsubishi Heatpump to zigbee2mqtt/Domoticz Auto Discovery
I appreciate you sharing this! Sticking with the same selector values is a smart move, as it helps avoid the hassle of rewriting existing Domoticz scripts. Great job!