WPC P9235 / P9222 packet communication

Hi All,

please, can anybody help me with any kind of spec defining packet communication between WPC P9235 and P9222, both directions. Available spec defines communication from RX (P9222) to TX (P9235) but I cant find any details about packet communication the other way i.e. control registers, status bits etc.

Any kind of help is very appreciated.


Best regards,