Thermostat

If the device definition from Zigbee2MQTT contains one or more exposes entries of type climate that at least have the features listed as required below, a Thermostat service will be created. The table below shows how the different features within this exposes entry are mapped to characteristics.

Name	Required access	Characteristic	Remarks
local_temperature	published	Current Temperature	Required
current_heating_setpoint or occupied_heating_setpoint	published, set	Target Temperature	Required. Only one of the listed properties may be present
system_mode	published, set	Target Heating Cooling State	Only used if running_state is also present
running_state	published	Current Heating Cooling State	Only used if system_mode is also present

Remarks

• If system_mode and/or running_state properties are not found, it is assumed that the device is a “heating” only device. The listed characteristics will still be added, but will only allow for the Heating state.
• Devices that have a occupied_cooling_setpoint are currently ignored. When writing the implementation, all these devices had two properties to set a setpoint (one for heating, one for cooling), but HomeKit only exposes a single attribute for this. Additional logic might be able to handle this situation, but this is currently not implemented.