Reference Guide

Exclusive OR = xor, check sum is calculated as below:

if Len = 3

[Chk] = 0X50 xor [H2] xor [H3] xor [Len] xor [Reply] xor [RC]

if Len = 4

[Chk] = 0X50 xor [H2] xor [H3] xor [Len] xor [Reply] xor [RC] xor [Cmd]

if len > 4

[Chk] = 0X50 xor [H2] xor [H3] xor [Len] xor [Reply] xor [RC] xor [Cmd] xor ... xor

[Data[Len-5]]

Example Command

Example: GetBrightness Command

Command: 6E 51 82 EB 30 66

[H0] = 6E

[H1] = 51

[Len] = 82

[R/W] = EB

[Cmd] = 30

[Chk] = 66

Example: GetBrightness Reply

Reply: 6F 6E 84 02 00 30 4B E7

[H2] = 6F

[H3] = 6E

[Len] = 84

[Reply] = 02

[RC] = 00

[Cmd] = 30

[Data0] = 4B

[Chk] = E7