RFID Communications

Example

Reads four bytes of data from the tag starting at address 0001H. A timeout of 2 seconds (07D0H = 2000 x 1 ms increments) is set for the completion of the Read All. The Family ID byte is set to zero, so all tags are read. Three tags respond with read data.

Command from Host

MSB

LSB

Remarks

AAH

85H

Perform Command 85

 

 

 

00H

02H

Tag Family 00/ Index 2

 

 

 

00H

01H

Start Address

 

 

 

00H

04H

Read Length

 

 

 

07H

D0H

2-second Timeout

 

 

 

FFH

FFH

Message Terminator

 

 

 

Response from Controller

MSB

LSB

Remarks

AAH

85H

Command Echo/Tag 1

 

 

 

00H

30H

Data byte 1/Tag 1

 

 

 

00H

31H

Data byte 2/Tag 1

 

 

 

00H

32H

Data byte 3/Tag 1

 

 

 

00H

33H

Data byte 4/Tag 1

 

 

 

FFH

FFH

Terminator/ Tag 1

 

 

 

AAH

85H

Command Echo/Tag 2

 

 

 

00H

40H

Data byte 1/Tag 2

 

 

 

00H

41H

Data byte 2/Tag 2

 

 

 

00H

42H

Data byte 3/Tag 2

 

 

 

00H

43H

Data byte 4/Tag 2

 

 

 

FFH

FFH

Terminator/ Tag 2

 

 

 

AAH

85H

Command Echo/Tag 3

 

 

 

00H

34H

Data byte 1/Tag 3

 

 

 

00H

35H

Databyte 2/Tag 3

 

 

 

00H

36H

Data byte 3/Tag 3

 

 

 

00H

37H

Data byte 4/Tag 3

 

 

 

FFH

FFH

Terminator/ Tag 3

 

 

 

AAH

FFH

Termination Packet

 

 

 

03H

08H

Ntag/Status

 

 

 

FFH

FFH

Terminator Message

 

 

 

LRP2000 Passive Reader/Writer

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Image 79
Escort LRP2000 manual Termination Packet