What it exposes
| Feature | Property | Values | Control |
|---|---|---|---|
| Pressure | pressure | kPa | read only |
| Temperature | temperature | °C | read only |
| Humidity | humidity | % | read only |
| Battery | battery | % · 0…100 | read only |
| Low battery | battery_low | — | read only |
| Basic data | basic_data | Barometer, T&H | settable |
| Invert color | invert_color | BW, WB | settable |
| Pressure offset | pressure_offset | hPa · -50…50 | settable |
| Temperature offset | temperature_offset | °C · -50…50 | settable |
| Humidity offset | humidity_offset | % · -50…50 | 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:
{
"pressure": 1012,
"temperature": 21.6,
"humidity": 46.2,
"battery": 87,
"battery_low": false,
"basic_data": "Barometer",
"invert_color": "BW",
"pressure_offset": 0,
"temperature_offset": 0,
"humidity_offset": 0,
"linkquality": 120
}
Send commands to zigbee2mqtt/my_device/set:
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"basic_data":"T&H"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"invert_color":"WB"}'
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.