What it exposes
| Feature | Property | Values | Control |
|---|---|---|---|
| CO₂ | co2 | ppm | read only |
| Temperature | temperature | °C | read only |
| Humidity | humidity | % | read only |
| Pressure | pressure | kPa | read only |
| Illuminance | illuminance | lx | read only |
| Auto brightness | auto_brightness | — | settable |
| Night onoff backlight | night_onoff_backlight | — | settable |
| Night on backlight | night_on_backlight | Hr · 0…23 | settable |
| Night off backlight | night_off_backlight | Hr · 0…23 | settable |
| Long chart period | long_chart_period | 1H, 24H | settable |
| Rotate | rotate | 0, 90, 180, 270 | settable |
| Temperature offset | temperature_offset | °C · -50…50 | settable |
| Humidity offset | humidity_offset | % · -50…50 | settable |
| Forced recalibration | forced_recalibration | — | settable |
| Factory reset co2 | factory_reset_co2 | — | settable |
| Manual forced recalibration | manual_forced_recalibration | ppm · 0…5000 | settable |
| Enable gas | enable_gas | — | settable |
| Invert logic gas | invert_logic_gas | — | settable |
| High gas | high_gas | ppm · 400…5000 | settable |
| Low gas | low_gas | ppm · 400…5000 | 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:
{
"co2": 640,
"temperature": 21.6,
"humidity": 46.2,
"pressure": 1012,
"illuminance": 120,
"auto_brightness": false,
"night_onoff_backlight": false,
"night_on_backlight": 12,
"night_off_backlight": 12,
"long_chart_period": "1H",
"rotate": "0",
"temperature_offset": 0,
"humidity_offset": 0,
"forced_recalibration": false,
"linkquality": 120
}
Send commands to zigbee2mqtt/my_device/set:
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"auto_brightness":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"night_onoff_backlight":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"long_chart_period":"24H"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"rotate":"90"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"forced_recalibration":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: "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.