User Manual Part 1

RFID Interface
LRP2000 Long Range Passice Reader/Writer
55
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ABxS Command 7 (07H): Read Tag Serial Number
DESCRIPTION
This command retrieves the eight-byte tag serial number.
DISCUSSION
Each controller tag has a unique serial number. This number cannot
be changed and is not part of the available data bytes. The tag serial
number will be returned in the LSB only, with the MSB as 00H.
Field Remarks
Command Command number in hex
preceded by AAH
Timeout Timeout value given in 1 ms units
(001EH - FFFEH)
Message Terminator FFFFH
Example
This example will wait until a tag is in range and then reads the 8-byte
serial number. In this example the ID is 1E6E3DC200000000H in
hexadecimal.
Command from host Response from controller
MSB LSB Remarks MSB LSB Remarks
AAH 07H Perform
Command 7
AAH 07H Command Echo
07H D0H Timeout 00H 001EH First SN byte
FFH FFH Message
Terminator
00H 6EH Second SN byte
00H 3DH Third SN byte
00H C2H Fourth SN byte
00H 00H Fifth N byte
00H 00H Sixth SN byte
00H 00H Seventh SN byte
00H 00H Eighth SN byte
FFH FFH Message Terminator