One of the cheapest ways to add per-radiator smart heating to a local-first setup. It joins ZHA or Zigbee2MQTT directly - no SONOFF hub or cloud - and exposes setpoint, open-window detection, child lock, frost protection and a weekly schedule. Pair it with an external temperature sensor for far better room accuracy than the built-in valve sensor.
Standout: A budget Zigbee radiator valve that pairs to any Zigbee 3.0 coordinator, exposing direct valve-position control plus an external-temperature input.
Notes last checked Jun 7, 2026.
Compatibility snapshot
Home AssistantexcellentFull local control, no cloud needed. Native Home Assistant integration or a local protocol.
Apple HomenoneNo official support on this platform.
Google HomenoneNo official support on this platform.
AlexanoneNo official support on this platform.
Works offlineyes
Setupmoderate
Extra hub neededyes
Powerbattery
Local control facts
Home Assistant: zha integration, Local Polling (home-assistant.io, checked Oct 10, 2026)
Zigbee2MQTT: supported device, listed as SONOFF TRVZB (Zigbee thermostatic radiator valve) (zigbee2mqtt.io, checked Oct 10, 2026)
Why it stands out
Excellent local control via ZHA or Zigbee2MQTT with no cloud dependency
Very low cost; pairs to any generic Zigbee 3.0 coordinator
Some users report occasional command lag over Zigbee
Best for
Local-first households with hydronic radiators wanting cheap per-room heating control
ZHA / Zigbee2MQTT users who already run a Zigbee coordinator
Avoid if
You have forced-air or electric baseboard heat (this is a hydronic radiator valve)
You want a hub-free Matter device
Privacy and local-control notes
Pairs to a local Zigbee coordinator via ZHA or Zigbee2MQTT with no SONOFF/eWeLink cloud. All control stays on your LAN.
Home Assistant support: supported · integration path: ZHA or Zigbee2MQTT (local).
Buying reality check
Price notes: Buy it direct: $26.90 at ITEAD and $27.90 at the SONOFF US store (ITEAD re-read 2026-10-21). Takes 3x AA batteries (not included), good for roughly 6+ months. SONOFF now also sells a second-generation valve, the TRV Gen2 (TRV-ZBT), at $34.90; it is smaller with a colour screen and a longer Zigbee2MQTT feature list, but the TRVZB is still stocked at both storefronts and is the cheaper of the two.
SONOFF's second-generation Zigbee radiator valve is smaller, costs more, and is supported in Zigbee2MQTT. A stopgap ZHA quirk shipped in zha-quirks 2.4.0.
From the change log and the news briefs that name this product.
Verified against
The compatibility notes above have not been through the source audit yet.
The manufacturer's page is here; the notes were last checked Jun 7, 2026.
SONOFF TRV Gen2 (TRV-ZBT) in Home Assistant: setup, calibration and ZHA vs Zigbee2MQTT
The SONOFF TRV Gen2 (TRV-ZBT) is well supported in Zigbee2MQTT 2.12.1+, and zha-quirks 2.4.0 added a basic ZHA quirk. Pairing, calibration, room sensors.
SONOFF TRV Gen2: what changes for a Zigbee heating setup
SONOFF's second-generation Zigbee radiator valve is smaller, costs more, and is supported in Zigbee2MQTT. A stopgap ZHA quirk shipped in zha-quirks 2.4.0.
