Hi, I’ve been trying to reverse engineer an air conditioner remote control, have done most of it but can’t figure out the logic behind the checksum (well, i believe it is a checksum). I’ve found several ways of getting the checksum but none of them seems to work, in my case. It’s a 14 bytes protocol, this is the data ive got so far (using an arduino and a tsop1838 ir receiver):
11000100 11010011 01100100 10000000 00000000 00000100 00010000 11110000 00001000 00000000 00000000 00000000 00000000 00111010
11000100 11010011 01100100 10000000 00000000 00100100 00010000 11110000 00011100 00000000 00000000 00000000 00000000 00010001
11000100 11010011 01100100 10000000 00000000 00100100 00010000 11110000 00010000 00000000 00000000 00000000 00000000 00011010
11000100 11010011 01100100 10000000 00000000 00100100 00010000 11110000 11001000 00000000 00000000 00000000 00000000 11000110
11000100 11010011 01100100 10000000 00000000 00100100 00010000 11110000 10101000 00000000 00000000 00000000 00000000 10100110
11000100 11010011 01100100 10000000 00000000 00100100 11000000 11110000 00001000 00000000 00000000 00000000 00000000 11011010
11000100 11010011 01100100 10000000 00000000 00100100 01000000 11110000 00001000 00000000 00000000 00000000 00000000 01011010
3rd bit in the 6th byte turns the ac on or off (1 for on and 0 for off)
4 first bits in the 7th byte are for mode
4 first bits in the 8th byte are for temperature
3 first bits in the 9th byte are for fan
4th, 5th, 6th in the 9th byte are for swing
and i believe the last byte is the checksum. could anybody help me with that?
thanks in advance and sorry for any english mistake