Baracoda Barcode Reader Manual do Utilizador descarregar pdf (Página 72)

DualRunners – Communication Protocol v1.3 - 72 -

Data Capture

for Workforce

in Motion

6.6.

Tag-it HF-I Plus chip tags

6.1 Tag memory structure

6.1 Tag memory structure6.1 Tag memory structure

6.1 Tag memory structure

Tag-it HF-I Plus chip tags have 256 bytes of memory divided into 64 (sixty-four) 4-bytes long blocks.

6.2 Reading tag data

6.2 Reading tag data6.2 Reading tag data

6.2 Reading tag data

a) Communication diagram

The following diagram shows what needs to be done in order to read the contents of a Tag-it HF-I Plus chip tag:

Terminal

BRRT or BDR Reader

b) Data sent from the terminal to the reader

First of all, the terminal needs to send to the reader a Read data command to the reader. This command is

described in the communication protocol guide of the reader; its code ID is 0x81. In this case, the format of the

command will be as follows (in hexadecimal):

DE 00 07 81 00 04 1E 0C 00 FF

where:

- DE: prefix

- 00 07: data length (7 bytes will follow)

- 81: command ID

- 00 04: protocol mask (ISO 15693 for Tag-it HF-I Plus chip)

- 1E: timeout for the response (30s)

- 0C: card type (Tag-it HF-I Plus chip)

- 00 FF: start/stop sectors/pages (00 FF means read the whole memory)

Send read command to

reader

Send tag data that has been

read

Send end of data packet

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Baracoda Barcode Reader Manual do Utilizador Página 72