EverFocus EDR410H - Manual (Page 124)

15.1 Transmission Setting
There are 6 different speeds that can be used to transmit instruction or
information through the RS232/RS485 port on the device, 1200 baud, 2400
baud, 4800 baud, 9600 baud, 19200 baud, and 3840 baud. The default setting
from the factory is 9600 baud. Please refer to RS232/RS485 Setting Menu on
page 32 for details.
15.2 Remote Control Protocol
A computer can be used to control the DVR by sending the packet as follows.
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EDR410/810 485/232 Control Code Protocol
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1-1. Sample control code packets
Example1: A packet that send "REC" key to EDR(ID=5)
0x85 (length)
0x00 (Receiver ID high byte)
0x05 (Receiver ID low byte
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 EDR(broadcast)
0x85 (length)
0x7f (Receiver ID high byte)
0x7f (Receiver ID low byte)
0x4B (OPcode = key )
0x0B (DATA1 = "Play" keycode )
0x59 (checksum)
)
0x4B (OPcode = key)
0x08 (DATA1 = "Rec" keycode)
0x5D (checksum)
Example2: A packet that send "PAUSE" key to EDR(ID=4999)
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