NodOn Zigbee Thermostatic Radiator Valve vs Sonoff TRV Gen2 Zigbee Thermostatic Radiator Valve

The 2.4 GHz radio is Zigbee (IEEE 802.15.4), not Wi-Fi.

The Thread Connection line in the SONOFF spec table is the M30 x 1.5 mm valve thread, not the Thread protocol.

Zigbee 3.0 end device at 2.4 GHz with a maximum radio power of +8 dBm, so it joins an existing Zigbee network and needs a compatible coordinator or gateway. | NodOn lists Home Assistant, Jeedom, Zigbee2MQTT, WiziNote, Energeasy Connect, Otodo, Alexa and Edalso as compatible gateways for this model. | Battery-powered, so it is an end device only and not a Zigbee router.

Zigbee 3.0 end device (IEEE 802.15.4). SONOFF lists ZBBridge-P, ZBBridge-U, NSPanel Pro, iHost and its ZBDongle coordinators as compatible hubs.

An LED matrix shows the temperature value plus the radio, pairing, calibration, key-lock, Boost, Off, low-battery and error indicators.

High-definition IPS colour screen showing status, current temperature and settings, with 4-way rotation so it stays upright whichever way the valve is mounted.

NodOn documents automated scenarios based on lifestyle habits and automatic shut-off when a window is open, driven from the compatible gateway or home automation system. | The valve cycles itself once a week to limit lime and scale.

Smart Scene triggers on open-window detection, device status or the current temperature, and can switch the valve to Auto, Anti-freeze, Manual or Boost or set a temperature between 5 and 30 degrees Celsius.

A key lock disables the buttons on the device so the temperature cannot be changed by hand, and Zigbee2MQTT exposes it as child_lock.

Child lock disables the knob so the valve can only be changed from the app.

The display shows the temperature value and the heating state on the device, and the measured room temperature is exposed to the gateway as local_temperature.

The IPS screen shows the current temperature alongside the target temperature and the heating status.

Frost protection mode is supported.

Anti-freeze mode holds a minimum safeguard temperature to protect pipes and the heating system in cold weather, and its threshold is adjustable.

No geofencing. Any location automation has to be built in the gateway.

NodOn lists Alexa among the compatible gateways for this model, and its Zigbee range is documented as working with Amazon Alexa gateways.

SONOFF documents Alexa under Third-party Platforms for this model, with working mode and temperature control. Its hub list also covers direct pairing to the Zigbee radio of the Echo Show 2nd Gen, Echo Plus 2nd Gen and Echo 4th Gen.

Zigbee2MQTT publishes a device page for this exact model, the TRV-4-1-00, exposing child lock, climate, battery, valve position and the display controls. | A technical review tested the valve on Home Assistant and reports it pairs cleanly through ZHA as well, as a climate entity with battery, heating-demand and setpoint-limit entities. | NodOn also lists Home Assistant among the compatible gateways for this model.

Zigbee2MQTT has a device page for the TRV-ZBT and SONOFF asks for Zigbee2MQTT 2.12.1 or later for full feature support. For ZHA, SONOFF publishes a quirk script while its pull request is pending, so some entities need that script until it is merged.

Two 1.5 V AA/LR6 cells power the valve, supplied in the box; NodOn advises against rechargeable batteries.

There is no learning or adaptive scheduling on the valve: any automatic behaviour is built in the gateway from the exposed sensor and setpoint entities.

NodOn documents programming of heating time slots and creation of automated scenarios through a compatible Zigbee gateway, and the setpoint can also be changed on the device between 8 and 28 degrees Celsius.

Three switchable schedule plans, each covering all seven days of the week with up to 12 time slots per day, plus Manual and Anti-freeze operating modes and a Boost timer.

The datasheet states an operating humidity of 0-90% rH, not a humidity sensor.

The valve measures room temperature itself and exposes it to the gateway as local_temperature, with a local temperature calibration offset. | The user guide notes a temperature offset setting and a calibration run after installation and after every battery change.

The valve measures room temperature itself and shows it on the display, with a temperature offset setting to calibrate the reading.