1NFC-EMULATE-TAG(1)          General Commands Manual         NFC-EMULATE-TAG(1)
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NAME

6       nfc-emulate-tag - Simple tag emulation command line demonstration tool
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SYNOPSIS

9       nfc-emulate-tag
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DESCRIPTION

12       nfc-emulate-tag  is  a  simple tag emulation tool that demonstrates how
13       emulation can be done using libnfc.
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15       Currently, this tool partially emulates a Mifare Mini: it  is  detected
16       as  Mifare  Mini  but  internal MIFARE proprietary commands are not yet
17       implemented.
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19       To be able to emulate a target, there are two main parts:
20        - communication: handle modulation, anticollision, etc.
21        - computation: process commands (input) and produce results (output).
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23       This demonstration tool proposes a logical structure to handle communi‐
24       cation and a simple function to deal with computation.
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26       To  improve  the target capabilities, we can now implement more allowed
27       commands in a single function: target_io()
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29       Please note that, due to timing issues, it is very difficult to  imple‐
30       ment  an  ISO14443-4  tag  this  way:  RATS request expects a quick ATS
31       answer. By the way, even if you implement another kind of  tag,  timing
32       issues are often the source of problems like CRC or parity errors.  The
33       OmniKey CardMan 5321 is known to be very large on timings and is a good
34       choice  if  you  want  to experiment with this emulator with a tolerant
35       reader.
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IMPORTANT

39       ACR122 devices (like touchatag, etc.) can be used by this example (with
40       probably  timing  issue), but if something goes wrong, you will have to
41       unplug/replug your device. This is not a libnfc's bug, this problem  is
42       due to ACR122's internal MCU in front of NFC chip (PN532).
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BUGS

45       Please   report  any  bugs  on  the  libnfc  forum  at  http://www.lib‐
46       nfc.org/community/.
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LICENCE

49       libnfc and libnfc-examples are covered by the GNU Lesser General Public
50       License (LGPL), version 3.
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AUTHORS

53       Romuald Conty <romuald@libnfc.org>
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55       This manual page was written by Romuald Conty <romuald@libnfc.org>.  It
56       is licensed under the terms of the GNU GPL (version 2 or later).
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60                                October 8, 2010             NFC-EMULATE-TAG(1)
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