Sampo DR-S0426 - Manual (Page 24)

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9 RS-485 control protocol
Data format
Data: 1 Byte / Parity: None / Start bit: 1 / Baud: 9600
Totally 3 bytes in data frame:
1. Byte=0x10 :Broadcasting DVR
Byte=0x80+ID Number :Remote Control DVR (ID number range: 5~21)
2. Byte=Refer to below table :Command for each key string
3. Byte=First byte plus Second byte :Command for confirm checksum
Part Label Command
5 REC 0x21
6 CH1 0x11
7 CH2 0x12
8 CH3 0x13
9 CH4 0x14
10 CHALL 0x15
11 COPY NONE
12 RFAST 0x3A
13 STOP 0x51
14 PAUSE 0x3D
15 FFAST 0x3E
16 PLAY 0x52
17 UPRT 0x31
18 DNLT 0x32
19 MENU 0x20
20 LEFT 0x33
21 SELECT (ENTER) 0x35