Sorry, if not exactly on topic.
I have KT48ZWSRMT-LCD-C&D and LED 880. Between LED and controller I connected arduino.
Protocol controller -> LCD (LED) is same, except there is no last 3 bytes (no moving mode, current, temperature);
Protocol LCD (LED) -> controller is same, except 7 bytes and last byte 0x0E (no C settings);
 0C  03  F5  56  28  88  0E
I tried send LCD3 format, but controller does not answer.
I want to make my own "LCD" on arduino to be able change controller settings and display data over wifi (esp8266).
Update: after using search I guess this is different controller (with no current / temp sensors, as I understand), and sorted out protocol (it is the same, but not complete).
Update2: Code is working fine now with LCD3 protocol (full) as well. Seems like I messed something up first time. Might be useful for someone. By the way controller is sending current (not sure if it is correct) and last rx 2 bytes are 0x80 and 0x23 not 0x00 for my controller.
- [+] code