Baracoda Barcode Reader - Manual (Page 59)

DualRunners – Communication Protocol v1.3 - 59 -
Data Capture
for Workforce
in Motion
3. Mifare 1K tags
3.1 Tag memory structure 3.1 Tag memory structure 3.1 Tag memory structure 3.1 Tag memory structure
Mifare 1K tags have 768 bytes of memory divided into 16 (sixteen) 48-bytes long sectors. Every sector is divided
into 3 (three) 16-bytes long blocks
3.2 Reading tag data 3.2 Reading tag data 3.2 Reading tag data 3.2 Reading tag data
a) Communication diagram
The following diagram shows what needs to be done in order to read the contents of a Mifare 1K 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 00 1E 02 00 FF
where:
- DE: prefix
- 00 07: data length (7 bytes will follow)
- 81: command ID
- 00 00: protocol mask (it’s best to specify 00 00 for Mifare cards)
- 1E: timeout for the response (30s)
- 02: card type (02 means Mifare 1K)
- 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