EverFocus DVR-100H - Manual (Page 48)

Interface Specifications
42
10.2 Remote Control Protocol
A computer or a terminal can be used to control the unit by sending the packet as following.
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Digital Video Recorder 485/232 Control Code Protocol
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1-1. Sample control code packets
Example1 : A packet that send "REC" key to Digital Video Recorder(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 Digital Video Recorder(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 Digital Video Recorder (broadcast)
0x85 (length)
0x7f (Receiver ID high byte)
0x7f (Receiver ID low byte)
0x4B (OPcode = key )
0x0B (DATA1 = "Play" keycode )
0x59 (checksum)