Hi! I would look at https://www.aliexpress.com. The original post at Github recommends using esp8266 chip (esp-12e), which is quite old and has it’s own problems. This is the chip I used in my case and for me everything worked out well but I read at their Telegram channel that some people had issues with mysterious reboots and so on.
So now I would recommend some ESP32 chip or even devboard (less soldering), for instance: Wemos (Lolin) C3 mini: C3 mini — WEMOS documentation
They can be bought here: https://www.aliexpress.com/item/1005004740051202.html
Also, I would probably buy several modules as there is a chance that some might be bad or you could also use them in other smarthome projects. Here is a bundle of two: https://www.aliexpress.com/item/1005006710420932.html
Edit: Also you would need DC-DC buck converter like MP1584, XL4015, LM2596, mini360 as the AC unit delivers 14V or something which is too high for 3.3 or 5V ESP modules.
I have finally had 3 of my 5 Rinnai ACs working with this integration. Although all five units are the same model, the two that don’t connect have a different firmware version. 3 x AC running firmware v10031 works perfectly, and the 2x v52020 do not connect and cause the working units to become unavailable every 10 seconds. When I removed the v52020 units from the configuration, everything was fine again. Has anybody successfully changed firmware versions, and if so, how? IOS seems to lack any firmware options other than displaying the version number. No issues adding and removing from AC freedom.
Thanks for posting this, it’s working great for me. Installed via HACS, no fiddly configuration, just login and go. I have TECO Plantium 3D reverse cycle aircons.
I was having the same issue over and over again, i noticed that if i reset my router it would fix the issue even without having to restart the addon, so i changed the update interval to 30, and it’s been 5 days without having the issue, i will continue to monitor, but so far looking promesing
