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Stelpro HT402 in Home Assistant

Thermostats & TRV · Zigbee · Hilo thermostat

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
Stelpro
Model
HT402
Device type
Thermostats & TRV
Radio
Zigbee
Power
Mains powered
Reports itself as
HT402
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 A proposed change to add support for Stelpro (Stello) HT402 power and energy sensors, enabling Home Assistant to track electricity usage from these devices. since October 31, 2025 · zha-device-handlers #4453

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: Power Energy Outdoor temperature

Source: zha-device-handlers · pull request #4453 · by @ouaibe · October 31, 2025 · 1 approval
Signature: Stello / HT402

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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