RFID Communications

Example

Writes four bytes of data to the tag starting at address 0000H. A timeout of 2 seconds (07D0H = 2000 x 1 ms increments) is set for the completion of the Write.

Command from Host

Field

Content

Header

0202H

 

 

Command Size

000BH

 

 

Command Code

06H

 

 

Start Address

0000H

 

 

Number of Bytes

0004H

 

 

Timeout, 2 seconds

07D0H

 

 

Data to write to

52H

address 0000H

 

 

 

Data to write to

46H

address 0001H

 

 

 

Data to write to

49H

address 0002H

 

 

 

Data to write to

44H

address 0003H

 

 

 

Checksum

EEH

 

 

Terminators

03H

 

 

Response from Controller

Field

Content

Header

0202H

 

 

Response Size

0001H

 

 

Command Echo

06H

 

 

Checksum

F8H

 

 

Terminators

03H

 

 

6.5.4 ABxF Command 07H: Read Tag Serial Number

DESCRIPTION

Command 07H retrieves the eight-byte tag serial number.

DISCUSSION

Each ISO-15693 compliant tag has a unique serial number (over 280 trillion possibilities). This number cannot be changed and is not part of the available read/write address space of a tag.

CAUTION:The presence of multiple tags in the field will not cause errors, however there is no general way to predict which tag the controller will read first.

Field

Content

Header

0202H

 

 

Command Size

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

 

for this command

 

 

Command

07H

 

 

Timeout

2-byte timeout value in 1 ms increments (1EH - FFFEH)

 

 

Checksum

Optional checksum

 

 

Terminator

03H

 

 

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LRP2000 Passive Reader/Writer

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Escort LRP2000 manual ABxF Command 07H Read Tag Serial Number, Eeh, F8H