Comment by twtran

My experience is strictly with Daikin Stylish units bought a few months ago in the EU. They still have both the S21 port and a compartment for an external WiFi module, and for all intents and purposes it's plug and play. Their standard WiFi module is built in the internal unit motherboard AFAICT, and it only works with their Daikin Onecta platform (no local API whatsoever).