What it exposes
| Feature | Property | Values | Control |
|---|---|---|---|
| Smoke | smoke | — | read only |
| Smoke density | smoke_density | — | read only |
| Smoke density dbm | smoke_density_dbm | dB/m | read only |
| Selftest | selftest | selftest | settable |
| Test | test | — | read only |
| Buzzer | buzzer | mute, alarm | settable |
| Buzzer manual alarm | buzzer_manual_alarm | — | read only |
| Buzzer manual mute | buzzer_manual_mute | — | read only |
| Heartbeat indicator | heartbeat_indicator | — | settable |
| Linkage alarm | linkage_alarm | — | settable |
| Linkage alarm state | linkage_alarm_state | — | read only |
| Battery | battery | % · 0…100 | read only |
| Voltage | voltage | mV | read only |
| Power outage count | power_outage_count | — | 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:
{
"smoke": false,
"smoke_density": 0,
"smoke_density_dbm": 0,
"selftest": "selftest",
"test": false,
"buzzer": "mute",
"buzzer_manual_alarm": false,
"buzzer_manual_mute": false,
"heartbeat_indicator": false,
"linkage_alarm": false,
"linkage_alarm_state": false,
"battery": 87,
"voltage": 2950,
"power_outage_count": 0,
"linkquality": 120
}
Send commands to zigbee2mqtt/my_device/set:
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"buzzer":"alarm"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"heartbeat_indicator":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"linkage_alarm":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: "Smoke alarm"
mode: single
triggers:
- trigger: state
entity_id: binary_sensor.my_device_smoke
to: "on"
actions:
- action: notify.notify
data:
message: "Smoke detected!"
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.