What it exposes
| Feature | Property | Values | Control |
|---|---|---|---|
| Soil moisture | soil_moisture | % | read only |
| Soil moisture calibration | soil_calibration | % · -30…30 | settable |
| Soil moisture warning | soil_moisture_warning | — | read only |
| Soil moisture warning threshold | soil_moisture_warning_threshold | % · 0…100 | settable |
| Soil sampling interval | soil_sampling | s · 5…3600 | settable |
| Temperature | temperature | °C | read only |
| Temperature calibration | temperature_calibration | °C · -2…2 | settable |
| Humidity | humidity | % | read only |
| Humidity calibration | humidity_calibration | % · -30…30 | settable |
| Illuminance | illuminance | lx | read only |
| Illuminance calibration | illuminance_calibration | lx · 0…100 | settable |
| Water warning | water_warning | none, alarm | read only |
| Battery state | battery_state | low, middle, high | 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:
{
"soil_moisture": 38,
"soil_calibration": 0,
"soil_moisture_warning": false,
"soil_moisture_warning_threshold": 50,
"soil_sampling": 1803,
"temperature": 21.6,
"temperature_calibration": 0,
"humidity": 46.2,
"humidity_calibration": 0,
"illuminance": 120,
"illuminance_calibration": 50,
"water_warning": "none",
"battery_state": "low",
"linkquality": 120
}
The device only reports data and takes no commands.
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: "Room too warm"
mode: single
triggers:
- trigger: numeric_state
entity_id: sensor.my_device_temperature
above: 26
for: "00:10:00"
actions:
- action: notify.notify
data:
message: "Temperature above 26 °C"
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.