What it exposes
| Feature | Property | Values | Control |
|---|---|---|---|
| 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 |
| Backlight | backlight | % · 0…100 | settable |
| Sensor error | sensor_error | Normal, E1, E2 | read only |
| Child lock | child_lock | — | settable |
| Enable temperature control during child lock | temperature_set_enabled_while_blocked | — | settable |
| Relay mode | relay_mode | NO, NC, OFF | settable |
| Sensor choose | sensor_choose | internal, all, external | settable |
| Control algorithm | control_algorithm | TPI_UFH, TPI_RAD, TPI_ELE, HIS_02, HIS_04, HIS_06, HIS_08, HIS_10 … | settable |
| Frost set | frost_set | °C · 5…17 | settable |
| Valve Protection | valve_protection | off, on, anti_stop | settable |
| Comfort warm floor | comfort_warm_floor | OFF, LEVEL1, LEVEL2, LEVEL3, LEVEL4, LEVEL5 | settable |
| Max temperature | max_temperature | °C · 5…45 | settable |
| Min temperature | min_temperature | °C · 5…45 | settable |
| Delta RCWC Algorithm | delta_t_rcwc_alg | °C · 0.5…5 | settable |
| Device Pair State | device_pair_state | none, commutation_center, trv | read only |
| Battery | battery | % · 0…100 | read only |
| TRV Latest Firmware | trv_latest_firmware | — | read only |
| TRV Current Firmware | trv_firmware | — | read only |
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:
{
"current_heating_setpoint": 21,
"local_temperature": 20.5,
"system_mode": "heat",
"backlight": 50,
"sensor_error": "Normal",
"child_lock": false,
"temperature_set_enabled_while_blocked": false,
"relay_mode": "NO",
"sensor_choose": "internal",
"control_algorithm": "TPI_UFH",
"frost_set": 11,
"valve_protection": "off",
"comfort_warm_floor": "OFF",
"max_temperature": 25,
"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 '{"child_lock":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"temperature_set_enabled_while_blocked":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"relay_mode":"NC"}'
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.