EverFocus EDR1640 Instruction Manual page 145

0x4B (OPcode = key )
0x0B (DATA1 = "Play" keycode )
0x59 (checksum)
2-1. The format of message packet is as follows:
Length Byte (Prefix: 0x86, 0x87, or 0x88 ..... )
Receiver ID high byte
Receiver ID low byte
Opcode Byte
Data Byte1
Data Byte2
Data Byte3
.
.
Checksum Byte
2-2. Length Byte
This Length Byte is also a prefix. Bit7 must be 1.
EX: 0x87 ==> this packet has 7 bytes length. (not included Length byte itself)
2-3. Receiver ID
1). Individual receiver ID
----------------------------------------------------------
Decimal 14bit binary value Hbyte Lbyte Receiver ID
------- ------------------- ------ ----- -----------
0 0000000 0000000 00 00 ID = 0
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