Back to all devices

SONOFF SNZB-09P in Home Assistant

Smoke & safety · Zigbee · Siren

Zigbee2MQTT Quirk proposed, not merged yet 1 open report

Zigbee device – see the note above on what ZHA needs for it.

Brand: SONOFF
Model: SNZB-09P
Device type: Smoke & safety
Radio: Zigbee
Reports itself as: SNZB-09P
Zigbee2MQTT: Device page on zigbee2mqtt.io

How the device gets into Home Assistant

official ZHA – with a Zigbee coordinator and the ZHA integration; for all its functions it needs a custom quirk, see above. Integration
add-on Zigbee2MQTT – Zigbee2MQTT runs as an add-on and passes the device on to Home Assistant over MQTT. Integration · Source

Known problems and fixes

Requests for ZHA support

support requested The SONOFF SNZB-09P Zigbee siren is not supported in ZHA, so its strobe light and tone alerts do not work through standard Zigbee warnings. Adding a quirk would enable these features via Home Assistant. since September 7, 2026 · zha-device-handlers #5310

Changes proposed for ZHA

pull request The Sonoff SNZB-09P siren is not supported in Home Assistant. The pull request would add integration to use it as an alarm device. since July 2, 2026 · zha-device-handlers #5136

ZHA quirks for this device

Quirk proposed, not merged yet Recommended quirk

Proposed to ZHA and waiting for review – the maintainers check it before it becomes part of Home Assistant.

Adds: Alarm sound enable Alarm light enable Alarm volume level Alarm duration Siren on External power Tamper Alarm sound type

Source: zha-device-handlers · pull request #5136 · by @Oniums · July 2, 2026
Signature: SONOFF / SNZB-09P

The quirk is not part of ZHA yet. You can use it as a custom quirk until it is:

Tell ZHA where custom quirks are kept – in configuration.yaml:
```
zha:
  custom_quirks_path: /config/custom_zha_quirks/
```
Create that folder and save the quirk as a .py file in it.
Restart Home Assistant. If the device was paired before, reconfigure it or remove and pair it again so the quirk is applied.
Check it worked: the device page shows the quirk under Zigbee info.

A custom quirk has not been reviewed by the ZHA maintainers. Delete the file once the quirk is part of a Home Assistant release – otherwise the old copy takes precedence.

All quirks in the ZHA quirk database →

Alternatives

The same job from other makers – devices of the same type and radio that work with Home Assistant too.

Moes ZSS-HM-SSD01 Smoke & safety · Zigbee · Smoke sensor Zigbee2MQTT ZHA quirk 1 open report Review
Tuya TS0216 Smoke & safety · Zigbee · Sound and flash siren Zigbee2MQTT Review
Develco SMSZB-120 Smoke & safety · Zigbee · Smoke detector with siren Zigbee2MQTT ZHA quirk 2 open reports Review
Alecto SMART-SMOKE10 Smoke & safety · Zigbee · Smoke detector Zigbee2MQTT Review

Sources: Zigbee2MQTT, ZHA quirks, Z-Wave JS, the Matter certification database, Shelly, ESPHome, Tasmota, Tuya Local and the issue trackers on GitHub. Reports are assigned to a device by the identifiers they contain; the sentences come from the integration pages, where a language model writes them from the titles.