I recently installed Mitsubishi AC with Mitsubishi MAC-577IF2-E Wi-Fi controller, and as always nowadays these devices communicate with Cloud servers first, then with you, which practically means you need to wait minutes for your changes to take effect.
So after setting this one up with Wireshark I found out (via DNS responses) that it communicates with https://production.receiver.melcloud.com/ as its TLS 1.2 (if connecting with Firefox or Chrome I get
ERR_SSL_VERSION_OR_CIPHER_MISMATCH, so I guess it's using a different cipher also) I cannot see anything
But the device has HTTP server on port 80 (not the first setup server where you enter Wi-Fi password, but when it's already connected to Wi-Fi if you go to its IP address it has HTTP server there) and requires HTTP basic auth when trying to communicate with it.
So my first step is to fire up binwalk and look at the firmware, but I don't know how to get the firmware, looking in the app is looks like that there is no firmware update option, so I was wondering is there any way to get the firmware somehow (maybe someone has it already) so I can start to play around?
I already found this: https://github.com/ncaunt/meldec but since my AC uses HTTPS, I am out of luck here.