Reprogram Thermoval TVT31 WiFi Thermostats to Work with Tuya App?

Good afternoon
As is usually the case when remodelling a house, various systems of control devices were installed. As a result, I have to use a number of apps to handle this. I have Thermoval TVT31 WiFi thermostats used to control the temperature in the rooms. Unfortunately I have quite a few of these - so replacing them would be expensive. Hence my question is whether it is possible to somehow reprogram these controllers to work in accordance with the TUYA app?

What do these thermostats look like inside, what WiFi module, what's in there? It's unlikely you'll be able to hook them up to Tuya, but maybe Home Assistant could.

EDIT: What surprises me, though, is that other Thermoval models show up as Tuya-compatible and the one you have doesn't.... details https://www.elektroda.pl/rtvforum/topic4033701.html#21105542

Thanks for the reply. As soon as I'm out of town I'll take a picture of the inside of the controller. It is one board with some kind of wi-fi module soldered in. In the part that is in the box there is a second board with a 12V power supply and an executive relay.
Unfortunately, I equipped the house at a time when I still had no idea about all the control systems, hence I basically have to use three platforms - Tuya, Thermowal and Yooda- Aluprof.
I have two questions, because I understand that the individual devices work through the support and maintenance of a platform by the manufacturer.
Do the ones based on tuya work through the support of the manufacturers of the individual devices, redirecting traffic to the application that supports tuya or for example smart life? - I mean, do they fare better because it is a popular platform and they connect directly to it, or not - because they communicate through the manufacturers' servers, and the elimination of one of them would result in their devices not connecting to smart life?
-why would home assistant be better?

Tuya devices connect directly to the Tuya cloud. Tuya makes its SDK available to manufacturers and anyone can make a Tuya device, but still Tuya remains Tuya.

It is also possible to convert Tuya so that it works 100% locally, without the manufacturer's servers, but then you lose the possibility to use the Tuya app at all.

Home Assistant has the advantage that more or less many kinds of devices can be connected to it, there is integration to Tuya too: https://www.home-assistant.io/integrations/tuya/
There can be a lot of fun with Home Assistant, so I wouldn't recommend it to the ordinary user who just wants something to work from the site. Even with exposing HA outside the local network is fun.

You would have to do your own web intelligence on whether these other environments you have can be integrated somehow, but under Thermoval I don't see much:
https://community.home-assistant.io/t/how-to-integrate-thermoval-tvt31-wifi-thermostat/166679
Although.... here is a comment:

https://community.home-assistant.io/t/wifi-th...ureon-beca-energy-component/48519/434?page=22


No less, this is a thread from 4 years ago, so it would probably be a bit of a combination to get it working at all.

In the above post there is some code snippet:

Maybe with these integrations it would be possible to have both Thermoval and Tuya displayed in the HA panel....

Thank you very much for your reply. I think the game is not worth the candle. It will be simpler to replace the individual devices, especially since on ali you can buy one quite cheaply under tuya, with similar functionality and an external sensor also ntc10k.Unfortunately I have as many as 7 of these TVT31, but stupidity costs money. This is probably a common mistake of those building or renovating a house.

There must have been a selection error, because according to the manufacturer's website, other Thermoval are compatible with Tuya:

Source:
https://thermoval.pl/baza-wiedzy/cieplo-w-zasiegu-reki/
Here you have the whole paragraph:

Quote:

The software of systems that support wireless heating control can be divided into two groups: internal and universal. The former are unique firmware and operate in their own environment, such as Thermoval Wi-Fi. The second are open, meaning that they can work with multiple devices simultaneously as part of an entire smart home management system. TUYA Smart Wi-Fi is an example of such software.

There are four WiFi controllers available from Thermoval:

- TVT 31: for electric underfloor and water heating, touchscreen, programmable, operated via the Thermoval WiFi app
- TVT 40: for electric underfloor and water heating, for air conditioning, touchscreen, programmable, system time clock, Intelligent function, operated via the WiFi TUYA Smart app
- TVT 45: for electric underfloor heating and water heating, touchscreen, programmable, open window function, operated by the WiFi TUYA Smart app
- TVT 50: for water heating and air conditioning, wireless, weekly program, open window function, operated by the WiFi TUYA Smart app

And maybe it's worth trying to ask the manufacturer anyway, if they couldn't help somehow? It's strange that just the TVT 31 doesn't have this support, while others do.

Maybe it's worth trying to pair this TVT 31 with a Tuya anyway?

Yes, now I know. At the time, these TVT 31 had all the advantages i.e.
-as the only ones with wi-fi they were available for immediate purchase at Castorama,
-they were white and pretty,
-as probably the only ones to show the time, setpoint and measured temperature at the same time,
-they had a simple non-inverted lcd display that was visible and readable during the day.

In principle, there's also nothing to combine, because so far everything works. I've used them quite interestingly - only two control the typical electric floor in the bathrooms. The rest indoors operate small, flat, wall-mounted radiators. The floor probes, are glued backwards on the opposite corner to the heaters. So you can set the room temperature, but you can also set the maximum temperature of the radiator itself, i.e. you set how much the radiator should try to heat the room, which of course has an impact on power consumption. Why yes. The house basically has a different type of heating, and very often it is left for a few days or longer.

For this moment I would really suggest to check these pairing of the TVT 31 with the Tuya app. Just pair according to the manual, but with Tuya.

I previously based this on a Youtube video from the manufacturer:

There it mentions the Thermoval app. I dug deeper, and the manual in turn mentions the rm heat application:

I'm beginning to wonder if it's not all the same after repainting.

p.kaczmarek2 wrote:

For the moment I would really suggest checking these pairings of the TVT 31 with the Tuya app. Just pair as instructed, but with Tuya.....

I tried it a long time ago, although I'll admit to not believing in success, I didn't try very hard. Smart Life did not detect it. But pairing is done in a strange way. The instructions told me to set the FAC parameter in the menu to 10 and turn it off. When switched on, the thermostat entered pairing mode. But this FAC can be set from 0 to 32. I have no idea what this is for, and the instructions say nothing.

pp. 9-10

https://www.sklep.robmex.pl/media/wysiwyg/thermoval/TVT_31_WiFi_Instrukcja_3_.pdf