NAME

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

SYNOPSIS

       nfc-emulate-tag

DESCRIPTION

       nfc-emulate-tag is a simple tag emulation tool that demonstrates how emulation can be done
       using libnfc.

       Currently, this tool partially emulates a Mifare Mini: it is detected as Mifare  Mini  but
       internal MIFARE proprietary commands are not yet implemented.

       To be able to emulate a target, there are two main parts:
        - communication: handle modulation, anticollision, etc.
        - computation: process commands (input) and produce results (output).

       This  demonstration tool proposes a logical structure to handle communication and a simple
       function to deal with computation.

       To improve the target capabilities, we can now implement more allowed commands in a single
       function: target_io()

       Please  note  that,  due to timing issues, it is very difficult to implement an ISO14443-4
       tag this way: RATS request expects a quick ATS answer. By the way, even if  you  implement
       another  kind  of  tag,  timing issues are often the source of problems like CRC or parity
       errors.  The OmniKey CardMan 5321 is known to be very large  on  timings  and  is  a  good
       choice if you want to experiment with this emulator with a tolerant reader.

IMPORTANT

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

BUGS

       Please report any bugs on the libnfc issue tracker at:
       https://github.com/nfc-tools/libnfc/issues

LICENCE

       libnfc is licensed under the GNU Lesser General Public License (LGPL), version 3.
       libnfc-utils and libnfc-examples are covered by the the BSD 2-Clause license.

AUTHORS

       Romuald Conty <romuald@libnfc.org>

       This manual page was written by Romuald Conty <romuald@libnfc.org>.  It is licensed  under
       the terms of the GNU GPL (version 2 or later).