What it exposes
| Feature | Property | Values | Control |
|---|---|---|---|
| CO₂ | co2 | ppm | read only |
| Pm1 | pm1 | µg/m³ | read only |
| PM2.5 | pm25 | µg/m³ | read only |
| Pm4 | pm4 | µg/m³ | read only |
| Pm10 | pm10 | µg/m³ | read only |
| Pm size | pm_size | µm | read only |
| Pm n05 | pm_n05 | #/cm³ | read only |
| Pm n1 | pm_n1 | #/cm³ | read only |
| Pm n25 | pm_n25 | #/cm³ | read only |
| Pm n4 | pm_n4 | #/cm³ | read only |
| Pm n10 | pm_n10 | #/cm³ | read only |
| Voc index | voc_index | VOC Index points | read only |
| Nox index | nox_index | NOx Index points | read only |
| Formaldehyde | formaldehyde | ppb | read only |
| Temperature | temperature | °C | read only |
| Humidity | humidity | % | read only |
| Illuminance | illuminance | lx | read only |
| Report delay | report_delay | sec · 6…600 | settable |
| 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 |
| Temperature offset | temperature_offset | °C · -50…50 | settable |
| Humidity offset | humidity_offset | % · -50…50 | settable |
| Formaldehyde offset | formaldehyde_offset | adc · -100…100 | settable |
| Auto clean interval | auto_clean_interval | day · 0…10 | settable |
| Manual clean | manual_clean | — | settable |
| Set altitude | set_altitude | meters · 0…3000 | settable |
| Forced recalibration | forced_recalibration | — | settable |
| Manual forced recalibration | manual_forced_recalibration | ppm · 0…5000 | settable |
| Automatic self calibration | automatic_self_calibration | — | settable |
| Factory reset co2 | factory_reset_co2 | — | 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,
"pm1": 0,
"pm25": 8,
"pm4": 0,
"pm10": 0,
"pm_size": 0,
"pm_n05": 0,
"pm_n1": 0,
"pm_n25": 0,
"pm_n4": 0,
"pm_n10": 0,
"voc_index": 0,
"nox_index": 0,
"formaldehyde": 0,
"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 '{"manual_clean":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"forced_recalibration":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"automatic_self_calibration":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.