What it exposes
| Feature | Property | Values | Control |
|---|---|---|---|
| On / off | state | — | settable |
| Climate | system_mode, current_heating_setpoint, local_temperature, local_temperature_calibration, running_state, preset | mode, heating setpoint, room temperature, local_temperature_calibration, running state, preset | settable |
| Control algorithm | control_algorithm | TPI_UFH, TPI_RAD, TPI_ELE, HIS_04, HIS_08, HIS_12, HIS_16, HIS_20 … | settable |
| Max temperature | max_temperature | °C · 5…45 | settable |
| Min temperature | min_temperature | °C · 5…45 | settable |
| Child lock | child_lock | — | settable |
| Valve Protection | valve_protection | — | settable |
| Relay mode | relay_mode | NO, NC, OFF | settable |
| Backlight | backlight | % · 0…100 | settable |
| Frost set | frost_set | °C · 5…17 | 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:
{
"state": false,
"current_heating_setpoint": 21,
"local_temperature": 20.5,
"system_mode": "heat",
"control_algorithm": "TPI_UFH",
"max_temperature": 25,
"min_temperature": 25,
"child_lock": false,
"valve_protection": false,
"relay_mode": "NO",
"backlight": 50,
"frost_set": 11,
"linkquality": 120
}
Send commands to zigbee2mqtt/my_device/set:
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"current_heating_setpoint":21.5}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"system_mode":"heat"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"state":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"control_algorithm":"TPI_RAD"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"child_lock":true}'
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.