Baracoda Barcode Reader - Manual (Page 70)

DualRunners – Communication Protocol v1.3 - 70 -
Data Capture
for Workforce
in Motion
5.3 5.3 5.3 5.3 Writing tag data Writing tag data Writing tag data Writing tag data
a) Communication diagram
The following diagram shows what needs to be done in order to write the contents of a Tag-it HF-I Plus inlay
tag:
Terminal BRRT or BDR Reader
b) Data sent from the terminal to the reader
For every block that needs to be modified, the terminal needs to send a write command to the reader. It is
recommended to verify what parts of the tag data have been modified and send only the differing blocks.
In order to write a page, the terminal needs to send to the reader a Write data command to the reader. This
command is described in the communication protocol guide of the reader; its code ID is 0x82. In the example
the user intends to modify block 3 (three), so the format of the command will be as follows (in hexadecimal):
DE 00 0C 82 00 04 00 0B 03 00 04 xx xx xx xx
where:
- DE: prefix
- 00 0C: data length (12 bytes will follow)
- 82: command ID (write tag data)
- 00 04: protocol mask (ISO 15693 for Tag-it HF-I Plus inlay)
- 00: timeout for the response (0 means use default = 5s)
- 0B: card type (Tag-it HF-I Plus inlay)
- 03: start block (3)
- 00 04: data length (4 bytes)
- xx xx xx xx: data to be written in block 3
Send write command to
reader
Confirm that data has been
written