Back to all devices
Samotech SM309-S Dimmer

Samotech SM309-S in Home Assistant

Wall switches · Zigbee · Zigbee dimmer 400W with power and energy metering

Zigbee2MQTT Quirk proposed, not merged yet

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

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

Facts about this device

Brand
Samotech
Model
SM309-S
Device type
Wall switches
Radio
Zigbee
Power
Mains powered
Reports itself as
SM309-S
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

Changes proposed for ZHA

  • pull request Samotech SM323 and SM309-S dimmers are not supported in ZHA. The proposed change would allow Home Assistant to control these dimmers. since May 27, 2026 · zha-device-handlers #5039

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: External switch type

Source: zha-device-handlers · pull request #5039 · by @fidusachates · May 27, 2026
Signature: Samotech / SM309-S

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.

Scroll to Top