What it exposes
| Feature | Property | Values | Control |
|---|---|---|---|
| Climate | local_temperature, occupied_heating_setpoint, system_mode, running_state, pi_heating_demand, control_sequence_of_operation | room temperature, heating setpoint, mode, running state, pi_heating_demand, control_sequence_of_operation | settable |
| Max heat setpoint limit | max_heat_setpoint_limit | °C · 4…40 | settable |
| Min heat setpoint limit | min_heat_setpoint_limit | °C · 4…40 | settable |
| Power | power | W | read only |
| Energy | energy | kWh | read only |
| Fixed load demand | fixed_load_demand | W · 0…3600 | settable |
| Display brightness active | display_brightness_active | % · 0…100 | settable |
| Display brightness inactive | display_brightness_inactive | % · 0…100 | settable |
| Display active timeout | display_active_timeout | seconds · 5…600 | settable |
| Local temperature source select | local_temperature_source_select | Ambient, External | settable |
| Control type | control_type | On/Off, PI, None | settable |
| Control status | control_status | Normal Operation, No Temperature, Remote Demand Override, Window Open, Local Force On, Maintenance, Output Temporal Limit, Sensor Fault | read only |
| Thermostat application | thermostat_application | Occupied Space, Floor, Not known | settable |
| Heating emitter | heating_emitter | None, Radiator, Fan Assisted Radiator, Radiant Panel, Floor, Not specified | settable |
| Heating output mode | heating_output_mode | Disabled, Relay | settable |
| Temperature sensor correction (floor) | temperature_sensor_correction_floor | °C · -9…9 | settable |
| Temperature sensor type (floor) | temperature_sensor_type_floor | 2kΩ sensor from HRT/Alre, 10kΩ sensor from B+J, 12kΩ sensor from OJ, 15kΩ sensor from DEVI, 33kΩ sensor from EBERLE, 47kΩ sensor from CTM, No sensor | settable |
| Temperature display mode | temperature_display_mode | celsius | settable |
| Child lock | child_lock | — | settable |
MQTT: state and commands
Zigbee2MQTT publishes the device state to zigbee2mqtt/my_device (my_device is the name you give the device). An example message:
{
"local_temperature": 20.5,
"occupied_heating_setpoint": 21,
"system_mode": "heat",
"max_heat_setpoint_limit": 22,
"min_heat_setpoint_limit": 22,
"power": 12.4,
"energy": 3.21,
"fixed_load_demand": 1800,
"display_brightness_active": 50,
"display_brightness_inactive": 50,
"display_active_timeout": 303,
"local_temperature_source_select": "Ambient",
"control_type": "On/Off",
"control_status": "Normal Operation",
"linkquality": 120
}
Send commands to zigbee2mqtt/my_device/set:
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"occupied_heating_setpoint":21.5}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"system_mode":"heat"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"local_temperature_source_select":"External"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"control_type":"PI"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"thermostat_application":"Floor"}'
Watch the topics live from the browser: MQTT client.
Home Assistant automation example
Zigbee2MQTT creates Home Assistant entities from the device name. If it is called my_device, an automation in automations.yaml can look like this:
- alias: "Cooler at night"
mode: single
triggers:
- trigger: time
at: "23:00:00"
actions:
- action: climate.set_temperature
target:
entity_id: climate.my_device
data:
temperature: 18
Check the YAML: YAML checker.
How to pair it
- In Zigbee2MQTT click Permit join.
- Put the device in pairing mode: usually a long press of the reset button (5–10 s) until the LED blinks; bulbs: switch the power off and on 5–6 times.
- Keep the device close to the coordinator or a router while pairing.
- Give it a clear name: MQTT topics and Home Assistant entities are built from it.
Exact procedure and model notes: the device page in the Zigbee2MQTT docs. No coordinator yet: coordinator picker.