Zigbee 3.0 thermostatic radiator valve with a backlit LCD that meters hot-water flow to each hydronic radiator. Home Assistant sets temperatures and schedules, reads the valve opening percentage, and can feed an external temperature sensor for accurate room control, fully locally over ZHA or Zigbee2MQTT.
Works on integrations
Protocols
Setup guides
Roles it can fill
Fits M30x1.5 valve bodies with included adapters and runs on 3x AA batteries. Frost protection, child lock, and open-window detection are built in; valve-opening control needs firmware 1.1.4+ and the external sensor input needs 1.2.1+ on ZHA. Works with any Zigbee 3.0 coordinator, though not the legacy Sonoff ZBBridge.
Entities in Home Assistant
26 entities via zigbee2mqtt
Primary entities 3 What automations and dashboards use.
| Entity | Type | Device class | Unit |
|---|---|---|---|
| Climate (main) | climate | — | — |
| Temperature sensor | select | — | — |
| Smart temperature control | switch | — | — |
Configuration 17 Settings exposed as entities, tunable from Home Assistant.
| Entity | Type | Device class | Unit |
|---|---|---|---|
| External temperature | number | — | °C |
| Frost protection temperature | number | — | °C |
| Temperature accuracy | number | — | °C |
| Temporary mode duration | number | — | minutes |
| Timer mode target temp | number | — | °C |
| Valve closing degree | number | — | % |
| Valve opening degree | number | — | % |
| Temporary mode | select | — | — |
| Child lock | switch | — | — |
| Open window | switch | — | — |
| Weekly schedule friday | text | — | — |
| Weekly schedule monday | text | — | — |
| Weekly schedule saturday | text | — | — |
| Weekly schedule sunday | text | — | — |
| Weekly schedule thursday | text | — | — |
| Weekly schedule tuesday | text | — | — |
| Weekly schedule wednesday | text | — | — |
Diagnostics 6 Health and troubleshooting values, hidden from dashboards by default.
| Entity | Type | Device class | Unit |
|---|---|---|---|
| Battery | sensor | battery | % |
| Closing steps | sensor | — | — |
| Idle steps | sensor | — | — |
| Valve closing limit voltage | sensor | — | mV |
| Valve motor running voltage | sensor | — | mV |
| Valve opening limit voltage | sensor | — | mV |
From the zigbee2mqtt device database (zigbee-herdsman-converters
26.108.1):
the entities zigbee2mqtt creates for
TRVZB.
Paired through ZHA instead, the same hardware produces a different set.
Where to buy
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