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Develco SMSZB-120 in Home Assistant

Smoke & safety · Zigbee · Smoke detector with siren

Zigbee2MQTT Quirk included in ZHA 2 open reports

This device is known to both Zigbee integrations: Zigbee2MQTT has a definition for it, and ZHA has a quirk that adapts it.

We have a detailed page on this device with compatibility ratings and prices. Details and compatibility

Facts about this device

Brand
Develco
Model
SMSZB-120
Device type
Smoke & safety
Radio
Zigbee
Power
Battery
Reports itself as
SMSZB-120, GWA1512_SmokeSensor
Also sold as
Cavius 2103, Frient 94430
Zigbee2MQTT
Device page on zigbee2mqtt.io

How the device gets into Home Assistant

  • official ZHA – with a Zigbee coordinator and the ZHA integration; the quirk the device needs is part of ZHA. 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

Open problems

  • open A question about how to hide advanced configuration options for a siren's IASWD cluster in ZHA, to simplify the user interface for those who don't need them. since November 1, 2025 · zha-device-handlers #4455

Requests for ZHA support

  • support requested The frient A/S SMSZB-120 smoke detector is not supported in ZHA. Adding support would allow Home Assistant to receive smoke detection alerts from this device. since September 10, 2025 · zha-device-handlers #4336

ZHA quirks for this device

Quirk included in ZHA Recommended quirk

Part of ZHA – Home Assistant uses it on its own, nothing to install.

Source: zha-device-handlers · since zha-quirks 2.2.2
Signature: frient A/S / SMSZB-120

1 more quirk for this device

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.

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.

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