Hi, your NSPanel Pro has been added to our OTA whitelist. Please check the latest v4.2.3 firmware through Top drop-down menu -> Settings -> About -> Software Update on your NSPanel Pro device.
After you’ve updated your NSPanel Pro, you need to enable Central heating through Top drop-down menu -> Settings -> Thermostats -> Central heating, and then you can configure it on Central heating screen which is by default the last screen on your NSPanel Pro.
If you encounter any issue, please let us know at NS Panel Pro Thermostat problems - #178 by MichaelLearnsToCode
Note: choose the corresponding TRV as the room thermometer and leave room actuator unset.