Tiny QOL change without too much work, you could install something like teamviewer on the tablet, and now you're able to control your AC remotely from your PC, your phone, or anywhere!
The MyAir (or e-Zone) app can already be accessed remotely. You install the app on your phone and pair it with your system by connecting to the same LAN. After the initial pairing it can be used from everywhere.
Hey - As the owner of a similar system I have a question for you - do you use their phone app to control your system from your phone in/out of the house, and did it still work after this?
Cool, that's all I needed to know, I'll be following in your footsteps at some point, thanks for taking the leap and doing all this :)
Now back to connecting an orange-pi zero to the petcube cam someone bought me for Christmas. I've found TTL pins on there and I want to know what's going on...
This is from my earlier notes, hope it helps some.
Pin 1: RS422 +/B
Pin 2: RS422 -/A
Pin 3: ? - appears to be unused; connected to unpopulated pad on PCB
Pin 4: GND
Pin 5: ~14.2v DC unloaded
Pin 6: GND
Pin 7: ?
Pin 8: ?
Shield: GND
Note: the RS422 protocol has a basic bus arbitration built-in to allow both ends to communicate. The control unit sends <U>Ping</U=xx> messages, after which it opens a slot for the Tablet to communicate back to it. At least on my system xx represents a simple CRC value that can be used to validate message authenticity. I haven't seen any AES encryption in use, messages I've seen are all plaintext, maybe the AES encryption was introduced in a later revision.
Interesting, not sure what's going on there then.. how recently was your system installed? Maybe they have updated the pinout on newer models? I'll go back and check though.
https://www.aliexpress.com/item/1005005918675239.html
The connectors on the small RJ45 daughter board are JST-SH 1.0
The yellow lead puts out 4.2v to replicate a Li-Ion battery (as far as I can tell). You can ignore this.
Red is positive
Black is negative
Green is usb d+
Blue is usb d-