What it exposes
| Feature | Property | Values | Control |
|---|---|---|---|
| Smoke | smoke | — | read only |
| Low battery | battery_low | — | read only |
| Tamper | tamper | — | read only |
| Battery | battery | % · 0…100 | read only |
| Sensitivity | sensitivity | low, medium, high | settable |
| Smoke density | smoke_density | — | read only |
| Selftest | selftest | — | settable |
| Voltage | voltage | mV | read only |
| Test | test | — | read only |
| Device temperature | device_temperature | °C | 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,
"battery_low": false,
"tamper": false,
"battery": 87,
"sensitivity": "low",
"smoke_density": 0,
"voltage": 2950,
"test": false,
"device_temperature": 31,
"power_outage_count": 0,
"linkquality": 120
}
Send commands to zigbee2mqtt/my_device/set:
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"sensitivity":"medium"}'
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.