What it exposes
| Feature | Property | Values | Control |
|---|---|---|---|
| Battery | battery | % · 0…100 | read only |
| Identify | identify | identify | settable |
| Temperature | temperature | °C | read only |
| Smoke | smoke | — | read only |
| Low battery | battery_low | — | read only |
| Test | test | — | read only |
| Alarm state | alarm_state | normal, prealarm, alarmed, critical_alarm | read only |
| Fault state | fault_state | — | read only |
| Muted | muted | — | read only |
| Trigger selftest | trigger_selftest | test | settable |
| Temporary mute | temporary_mute | — | settable |
| Heartbeat indicator | heartbeat_indicator | — | settable |
| Interconnectable | interconnectable | — | read only |
| Smoke level | smoke_level | 0…20 | read only |
| Smoke unit | smoke_unit | dB/m, %ft OBS | read only |
| Chamber contamination | chamber_contamination | normal, light_contamination, medium_contamination, critical_contamination | read only |
| Link available | link_available | inactive, smoke_active, co_active, gas_active, heat_active | read only |
| Siren for automation only | siren_for_automation_only | stop, smoke_siren, co_siren | settable |
| Shielding sensor detection | shielding_sensor_detection | min · 0…20 | settable |
| Temperature offset | temperature_offset | -15…15 | settable |
| Reported packages | reported_packages | 0…60000 | read only |
| Rejoin count | rejoin_count | 0…60000 | read only |
| Reboot count | reboot_count | 0…60000 | 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:
{
"battery": 87,
"temperature": 21.6,
"smoke": false,
"battery_low": false,
"test": false,
"alarm_state": "normal",
"trigger_selftest": "test",
"temporary_mute": false,
"heartbeat_indicator": false,
"interconnectable": false,
"smoke_level": 10,
"smoke_unit": "dB/m",
"chamber_contamination": "normal",
"link_available": "inactive",
"linkquality": 120
}
Send commands to zigbee2mqtt/my_device/set:
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"temporary_mute":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"heartbeat_indicator":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"siren_for_automation_only":"smoke_siren"}'
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.