Aposonic A-S1602R20B - Manual (Page 108)

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Appendix C – Keyboard Control Protocol
Data Format 5 Bytes –
Byte 1 : Synchronization Byte (0xFF)
Byte 2 : Address, i.e. Device ID (0 – 0xFF)
Byte 3 : Code (see below)
Byte 4 : Reserved (0x00)
Byte 5 : Checksum (sum of Bytes 2 – 4)
Code Value (MSB set for key press, MSB reset for release)
0 – 9 0x30 – 0x39 (ASCII characters ‘0’ – ‘9’)
*/mark 0x2d (ASCII character ‘–’ – Minus sign)
#/code 0x3d (ASCII character ‘=’ – Equal sign)
Alarm Reset 0x71 (ASCII character ‘q’)
MODE 0x77 (ASCII character ‘w’)
SEQ 0x65 (ASCII character ‘e’)
CALL 0x72 (ASCII character ‘r’)
SEARCH 0x74 (ASCII character ‘t’)
REC 0x79 (ASCII character ‘y’)
Fast Backward 0x61 (ASCII character ‘a’)
Fast Forward 0x73 (ASCII character ‘s’)
Single Step 0x64 (ASCII character ‘d’)
Play/Pause 0x66 (ASCII character ‘f’)
Stop 0x67 (ASCII character ‘g’)
Copy 0x68 (ASCII character ‘h’)
MENU 0x75 (ASCII character ‘u’)
ESC/PTZ 0x6f (ASCII character ‘o’)
MUTE/NEXT 0x6e (ASCII character ‘n’)
X2/GOTO 0x2c (ASCII character ‘,’ – Comma)
▲/BS 0x69 (ASCII character ‘i’)
▼/DEL 0x6d (ASCII character ‘m’)
◄ 0x6a (ASCII character ‘j’)
► 0x6c (ASCII character ‘l’ – small L)
ENTER 0x6b (ASCII character ‘k’)
Vol – 0x7a (ASCII character ‘z’)
Vol + 0x78 (ASCII character ‘x’)
– 0x63 (ASCII character ‘c’)
+ 0x76 (ASCII character ‘v’)
MAIN-AUX ON 0x62 (ASCII character ‘b’)
MAIN-AUX OFF 0x70 (ASCII character ‘p’)