RFID Communications

Example

This example waits until a tag is in range and then reads the eight-byte serial number. In this example, the serial number is F2720300000104E0.

Command from Host

Field

Content

Header

0202H

 

 

Command Size

0003H

 

 

Command Code

07H

 

 

Timeout

07D0H

 

 

Checksum

1EH

 

 

Terminators

03H

 

 

Response from Controller

Field

Content

Header

0202H

 

 

Response Size

0009H

 

 

Command Echo

07H

 

 

First ID Byte

F2H

 

 

Second ID Byte

72H

 

 

Third ID Byte

03H

 

 

Fourth ID Byte

00H

 

 

Fifth ID Byte

00H

 

 

Sixth ID Byte

01H

 

 

Seventh ID Byte

04H

 

 

Eighth ID Byte

E0H

 

 

Checksum

A3H

 

 

Terminators

03H

 

 

6.5.5 ABxF Command 08H: Tag Search

DESCRIPTION

Command 08H checks for an RFID tag in the controller field.

DISCUSSION

This command activates the controller to “look” for a tag in the RF field. If the controller finds a tag, it returns a command echo to the host. If no tag is present, it returns an error message. Even though this command is grouped with single tag commands, the presence of multiple tags within range of the antenna will not cause errors. See Section 6.6 for information on the error messages.

Field

Content

Header

0202H

 

 

Command Size

Packet length in bytes excluding the header, command size, checksum, and terminator bytes. 0003H

 

for this command

 

 

Command

08H

 

 

Timeout

2-byte value for the time in 1 ms units (1EH - FFFEH)

 

 

Checksum

Optional checksum

 

 

Terminator

03H

 

 

LRP2000 Passive Reader/Writer

96

Page 101
Image 101
Escort LRP2000 manual ABxF Command 08H Tag Search, F2H, A3H