Hi. I’m looking for an (available) radiator thermostat (a.k.a. TRV) which allows directly controlling the valve position. In the the zigbee2mqtt database I could find two such devices, but both seem not to be available any longer (at least in Germany): The Plugwise Tom and the Eurotronics Spirit Zigbee
There is a Z-Wave variant of the Eurotronics Spirit, but I’m using Zigbee for everything and would like not to switch. I’m currently using Siterwell GS361A-H04 throughout my appartment, but I experience some “bouncing”, i.e., the thermostat opens the valve way too much after I e.g. opened a window, resulting in the room being a crispy 23°C shortly after. I would like to control that myself.
I’m also searching for a smart thermostat that allows direct valve control in percent.
I could also only find the Plugwise, Eutronics and the Hive. But the Hive is also somehow not available in Germany like the other two (I’ve just searched about 20 shops, but none of these deliver to Germany).
Last year I’ve tried multiple thermostat with a temperature setpoint but they all suck! They can’t regulate themselves either because the temperature sensor is directly above the radiator or because of trash firmware.
I just want to be able to directly control them and create my own small AppDaemon App that calculates how much heating in % is needed.
How is there absolute no smart valve available that is dump and let’s me control with ZigBee!?
I found out that there is a newer version of the Eurotronic Spirit. It’s the “Eurotronic Comet Zigbee” which is currently available on Amazon in Germany. It has the exact same features as the Spirit (including the manual control - it even says that in the product description).
The Hive TRV mentioned in this thread is identical to items from Popp and Danfoss, which are available in Germany and other EU countries.
I have the Popp version, and it allows you to write a value for pi_heating_demand (as the zigbee name is for the valve position) but it does NOT actually set it. After writing the value, there is no change in the valve position. You can only set the desired temperature. See specs for the Zigbee clusters here. It is possible to link external sensors or apply offsets to the measured temperatures to overcome the problem of the radiator heating the internal temperature sensor too much to be useful as indication of the room temperature.
These valves have only limited support in ZHA at the moment but someone is working on improving that, with a number of PR’s in HA core and ZHA. See here and linked PRs for more info.
Yea, don’t buy them on Amazon at the moment, they have higher prices than everyone else. I just bought 2 more from Hornbach (german shop) 2 weeks ago, also 40€ each. Hornbach was the only seller with free shipping.
You should always compare the prices of all the shops. For germany you can use Idealo or Geizhals for this.
Really the only thing I hate about the Eurotronic thermostats is that they are extremely loud (I’ve also noticed some inconsistencies - some of them are louder than others). So don’t plan to use it in the bedroom.
