Mifare ultralight tags, 2 reading tag data – Baracoda Barcode Reader User Manual
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DualRunners – Communication Protocol v1.3
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Data Capture
for Workforce
in Motion
2.
2.
2.
2.
Mifare Ultralight tags
2.1 Tag memory structure
2.1 Tag memory structure
2.1 Tag memory structure
2.1 Tag memory structure
Mifare Ultralight tags have 64 bytes of memory divided into 16 (sixteen) 4-bytes long pages.
2.2 Reading tag data
2.2 Reading tag data
2.2 Reading tag data
2.2 Reading tag data
a)
Communication diagram
The following diagram shows what needs to be done in order to read the contents of a Mifare Ultralight 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 01 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)
-
01: card type (Mifare Ultralight)
-
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