Found some background info about the controller and relay box. they are both off-the-shelf components manufactured by JIECAN
Controller spec - http://www.jiecang.com/upload/file/enPDF/JCHT35K.pdf
and Relay spec - http://www.jiecang.com/upload/file/enPDF/JCB35N.pdf
I couldn't resist opening the remote. This is what i know about the pinout -
- Transparent - "M" button (when set to LOW)
- Brown - Digital - guessing it`s for data display (5v TTL)
- Black - GND
- White - ?
- Red - +5v
- Purple - ?
- Green - UP button (when set to LOW)
- Yellow - DOWN button (when set to LOW)
Next, doing some bit sniffing for the display.