@markcame Hi you should provide your heatpump info to Toni at the below link. check manufacturer + model + relevant data from your remote control and also your protocol info. then other persons using your heatpump can benefit from your work https://github.com/ToniA/arduino-heatpumpir PS. I am for my heatpump not using arduino/mysensors, as it was actually much easier to use/integrate Wemos D1 Pro mini + ESPEASy + P_115 heatpumpir into my Domoticz. https://www.domoticz.com/wiki/AC_/_heatpumpIR#Check_heatpumpIR