EverFocus EDR810H Insruction Manual page 125

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
1 0000000 0000001
2 0000000 0000010
....
126 0000000 1111110
127 0000000 1111111
128 0000001 0000000
129 0000001 0000001
255 0000001 1111111
256 0000010 0000000
....
511 0000011 1111111
....
16382 1111111 1111110
----------------------------------------------------------
2). Broadcast ID
----------------------------------------------------------
Decimal 14bit binary value Hbyte Lbyte Receiver ID
------- ------------------- ------ ----- -----------
16383 1111111 1111111
00 00 ID = 0
00 01 ID = 1
00 02 ID = 2
00 7e ID = 126
00 7f ID = 127
01 00 ID = 128
01 01 ID = 129
01 7f ID = 255
02 00 ID = 256
03 7f ID = 511
7f 7e ID = 16382
7f 7f All EDR connect to RS485/RS232
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