Versatile Thermostat: a full feature thermostat (energy, door/window, presence, motion, preset, ... management)

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Hi and thank you for your work on versatile thermostat! There is one question, I was not able to answer myself from the documentation:

I have some SONOFF TRVZB devices on my radiators and some external temperature and window sensors in place (mainly sonoff and aqara) managed by Z2M. Currently I am using the TRVs as “Thermostat over a valve”, which works fine (most rooms have 1 or two radiators). I have set the TRVs temperature offset to -7°C to ensure, that their automatic doesn’t interfere with the one from versatile thermostat.

Now I noticed, that TRVs can also be used as “Thermostat over a climate” with self-regulation and valve control. Are there any advantages of this mode compared to “Thermostat over a valve”?

Thanks in advance, Jan

  • Edit to add the information about the temperature offset
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Hi, I recently configured VTherm as “Thermostat over a climate” with Tuya HY368. What settings should be made to smooth out the valve that opens and closes periodically.

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What Auto-Regulation do you use?

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I tried using Light, Medium, Strong, Slow, the picture does not change.

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Do your underlying temperature sensors provide updates often enough? Have you set the “use internal temperature of the underlying”, because this can result in massive over-regulation.

Edit: I just saw this was the opening of the valve. What matters is the temp curve.

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“use internal temperature of the underlying” is not set

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What is your temp reading?

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Hello @SilverLeaf

To investigate on regulation issue, we should have the attributes of your vtherm and some regulation curves.
This is explain here: versatile_thermostat/documentation/en/additions.md at f8050e2ed7e7da333a77ab5c9e466272f87d4c15 · jmcollin78/versatile_thermostat · GitHub

and here: versatile_thermostat/documentation/en/reference.md at f8050e2ed7e7da333a77ab5c9e466272f87d4c15 · jmcollin78/versatile_thermostat · GitHub

You can also install the Versatile Thermostat UI Card (GitHub - jmcollin78/versatile-thermostat-ui-card: A custom card for a Versatile thermostat in home assistant based on versatile_thermostat integration) which gives more informations on the current self-regulation settings.

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Hi,
I’m doing some research in hardware to control the room temperature in my house (underfloor heating). In my research I encountered Versatile Thermostat as a good option to control everything from a software perspective.

But back to the hardware. I noticed that Versatile Thermostat allows direct controle of the valve (“VTherm over a valve”), but which thermoelectric actuators allow this kind of control? Or is this only for TRV’s?

I prefer thermoelectric actuators, since they are silent, my rooms already have temperature sensors and since my house has underfloor heating, my valves are hidden away somewhere centrally (per floor).

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Hello @DriesA ,

This have been designed for TRV with a direct control of the valve through a number entity.
But any “system” in which a valve is controllable may fit.

1 Like
178

Is it possible to open the valve only in steps of like 20%?
Cause I believe there is not much difference between 3%, 8% and 12% for example, you just cannot achieve such small granularity. Even my original TRV has only 4 levels to set. Also you would reduce the frequency of opening/closing the valve with this…
I’m using Sonoff TRVZB for what it’s worth…

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Hi, I starte using Sonoff TRVZB and i found following statement in docs:

Note: for Sonoff TRVZB you should not configure the “closing degree” parameter. This leads to a bug in the TRV and the hvac_action is no more working.

Is this still a case? How the bug manifest? I had it running with this for couple of days and didnt spot any issues (latest version of VTherm and trv firmware version 1.1.5