What it exposes
| Feature | Property | Values | Control |
|---|---|---|---|
| Smoke | smoke | — | read only |
| Smoke alarm silenced | smoke_alarm_silenced | — | read only |
| Button pushed | button_pushed | — | read only |
| Alarm control | alarm_control | off, smoke, burglar | settable |
| Broadcast alarms | broadcast_alarms | — | settable |
| Test mode | test_mode | — | settable |
| Test mode timeout | test_mode_timeout | seconds · 1…255 | settable |
| Battery | battery | % · 0…100 | read only |
| Low battery | battery_low | — | 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_alarm_silenced": false,
"button_pushed": false,
"alarm_control": "off",
"broadcast_alarms": false,
"test_mode": false,
"test_mode_timeout": 128,
"battery": 87,
"battery_low": false,
"linkquality": 120
}
Send commands to zigbee2mqtt/my_device/set:
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"alarm_control":"smoke"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"broadcast_alarms":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"test_mode":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.