Sonoff TRVZB thermostatic radiator valve

… this very helpful solution, which works very well (for me)! :-) I switched from “Better Thermostat” to VTherm because I was having major problems with my Sonoff TRVZB thermostats trying to turn my living room into a sauna by repeatedly opening the thermostats to 35°C. With VTherm, these problems have completely disappeared and I have a pretty good solution that works stably (apart from a slight overshoot of the target temperature after ventilation, but that's not a problem at all). I raised this issue to draw attention to a new firmware update for the Sonoff TRVZB thermostats, which has been …

Excerpt saved from GitHub on 2026-10-23.

My experience with the Sonoff TRV - A crappy device that can become very good with Home Assistant. I wanted to share my experience with the Sonoff TRV because the device is basically unusable out of the box, but can become very good. However, the setup is a bit complicated so to make it more accessible I made this guide. This may be applicable to other smart-TRVs if they expose the right configuration options. # The problem The Sonoff TRV has a fatal flaw. It works the following way: When the room temperature is less than the set temperature, it opens the valve fully. Once the room …

Excerpt saved from the Arctic Shift Reddit archive on 2026-10-23.

After updating the Sonoff TRVZB thermostat to firmware 1.4.0, the SonoffLAN integration started producing repeated cloud errors in Home Assistant logs: [code] This error repeats frequently, indicating that TRVZB cloud communication is broken after the firmware upgrade. Steps to reproduce - Pair TRVZB with eWeLink account and Home Assistant via SonoffLAN. - Update TRVZB firmware to version 1.4.0. - Observe HA logs – repeated Cloud ERROR 400 messages appear. Expected behavior TRVZB should be handled correctly by the SonoffLAN integration without cloud errors after firmware update. Additional …

Excerpt saved from GitHub on 2026-10-23.