A computer or a terminal can be used to control the unit by sending the packet as following.
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1-1. Sample control code packets
Example1 : A packet that send "REC" key to DVR (ID=5)
0x85 (length)
0x00 (Receiver ID high byte)
0x05 (Receiver ID low byte)
0x4B (OPcode= key )
0x08 (DATA1 = "Rec"keycode )
0x5D (checksum)
Example2 : A packet that send "PAUSE" key to DVR (ID=4999)
0x85 (length)
0x27 (Receiver ID high byte)
0x07 (Receiver ID low byte)
0x4B (OPcode= key )
0x0C (DATA1 = "Pause" keycode )
0x0A (checksum)
Example3 : A packet that send "PLAY" key to all DVR (broadcast)
0x85 (length)
0x7f (Receiver ID high byte)
0x7f (Receiver ID low byte)
0x4B (OPcode= key )
0x0B (DATA1 = "Play" keycode )
0x59 (checksum)
Appendic C: Serial Interface Specifications