User Manual Part 2

RFID Interface
132
LRP820S-Series Long-Range Passive Reader/Writers
Example
Checks for the presence of an RFID tag within range of the antenna.
Atimeout of 2 seconds (07D0H = 2000 x 1 msec increments) is set for
thecompletion of the Tag Search All. A tag is found.
Command from host Response from controller
Field Content Field Content
Header 0202H Header 0202H
Command Size 0005H Response Size 0003H
Command Code 88H Command Echo 88H
Family ID 00H Number of Tags 01H
Reserved 00H Status Byte 00H
Timeout 07D0H Checksum 73H
Checksum 99H Te rm i nato rs 03H
Terminator 03H