In a TCL 12 model where its own module never connected.. I put this one and it worked immediately.. I also put it in another brand and it worked well too

The module was easily installed on the device and placed externally on the board in the already existing socket. Later, with the TCL app, I couldn't connect it and attempted to connect it to the Tesla app where I already have a device in the bedroom, and surprisingly it installed right away without any issues. For now, after testing, all its functions work perfectly, and additionally, I have both air conditioners in the same app.

Easy installation on the air conditioner.

There is difficulty until it enters discoverable mode and is added as a Split AC in the application. There was no reset button on mine like the one shown in the product image. So to achieve it, I pressed the ECO button on the remote control 6 times and after a short wait, it made 2 beeps and the CF appeared on the screen and then the PP. It took a few repetitions but it found it and added it.

Within the application, it has various extra functions such as the dry button that blows pure air after you close it to dry the elements after cooling. Plus some nice features for scheduling. In google home it has minimal controls, but in Alexa it displays the ambient temperature in the app (the room temperature as perceived by the air conditioner). I imagine that in home assistant etc. it will be more useful to create usage scenarios while the air conditioner is in operation

Installed on tcl chsa 12. After two afternoons of testing, I realized that it requires a 2.4 network and there should not be a 5 with the same name (like I had with the Mercusys H50G) because it disconnects every 2-3 days, while now for a week and a half I have no issues. So a clean 2.4 and you're good.
I couldn't get it to work with any other application other than TCL. It's not perfect but it does the job just fine.
It's handy. If I see anything strange with disconnections, I will come back.
Disconnected once after 20 days. You unplug the air conditioner from the outlet for 1 to 2 minutes and plug it back in and everything is fine.
If it disconnects once a month, it's not a terrible problem (for me). It's manageable.
Apart from Alexa, which sees it through the TCL application, I couldn't get other applications to see it at all.

Update 2/7

It has been a month (since the last disconnection) without any disconnections. And after several power outages, it reconnects automatically.
All good. It does the job.
If I see anything strange, I will come back.

Update 12/7
No disconnections. I will buy one for the second one I have (they are the same).

The kit was installed on a TCL chsa 12. By removing the air conditioner plug, unscrew the cover of the board and pull the board slightly outwards. The wifi socket on the board is in the middle and it says wifi in small letters. After connecting, screw (with a screw not included) the module externally to the board box (it has a visible socket that fits) and after turning on the air conditioner, press the reset button.
The application I use is not from TCL but the smart life (purple home icon) which is compatible with several companies so I can centrally control the air conditioners from there.
A big downside is that I couldn't find any instructions anywhere and I had to take the whole board out to find the wifi slot.