What it exposes
| Feature | Property | Values | Control |
|---|---|---|---|
| Application fault status | application_fault_status | — | read only |
| Oem fault code | oem_fault_code | 0…255 | read only |
| Product variant | product_variant | — | read only |
| Temperature | temperature | °C | read only |
| Climate | local_temperature, local_temperature_calibration, occupied_cooling_setpoint, occupied_heating_setpoint, system_mode, running_state | room temperature, local_temperature_calibration, occupied_cooling_setpoint, heating setpoint, mode, running state | settable |
| Humidity | humidity | % | read only |
| Min cool setpoint limit | min_cool_setpoint_limit | °C · 0…30 | settable |
| Max cool setpoint limit | max_cool_setpoint_limit | °C · 0…30 | settable |
| Min heat setpoint limit | min_heat_setpoint_limit | °C · 0…30 | settable |
| Max heat setpoint limit | max_heat_setpoint_limit | °C · 0…30 | settable |
| Outdoor temperature | outdoor_temperature | °C | read only |
| Dhw temperature | dhw_temperature | °C | read only |
| Return water temperature | return_water_temperature | °C | read only |
| Boiler water temperature | boiler_water_temperature | °C | read only |
| External heat demand | external_heat_demand | °C · 0…90 | settable |
| External heat demand timeout | external_heat_demand_timeout | s · 300…3600 | settable |
| Max dhw setpoint | max_dhw_setpoint | °C · 0…100 | settable |
| Max boiler setpoint | max_boiler_setpoint | °C · 0…100 | settable |
| Boiler setpoint | boiler_setpoint | °C | read only |
| Battery | battery | % · 0…100 | read only |
| Battery type | battery_type | alkaline, nimh | settable |
| Keypad lockout | keypad_lockout | no_lockout, level_1, level_2 | 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:
{
"application_fault_status": 0,
"oem_fault_code": 128,
"temperature": 21.6,
"local_temperature": 20.5,
"occupied_heating_setpoint": 21,
"system_mode": "heat",
"humidity": 46.2,
"min_cool_setpoint_limit": 15,
"max_cool_setpoint_limit": 15,
"min_heat_setpoint_limit": 15,
"max_heat_setpoint_limit": 15,
"outdoor_temperature": 0,
"dhw_temperature": 0,
"return_water_temperature": 0,
"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 '{"battery_type":"nimh"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"keypad_lockout":"level_1"}'
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.