NAME

       nfc-relay-picc - Relay demonstration tool for ISO14443-4

SYNOPSIS

       nfc-relay-picc

DESCRIPTION

       nfc-relay-picc

       This  tool  requires  two  NFC  devices. One device (configured as target) will emulate an
       ISO/IEC 14443-4 type A tag, while the second device (configured as initiator) will act  as
       a  reader.  The  genuine  tag  can  be placed on the second device (initiator) and the tag
       emulator (target) can be placed close to the original reader.  All  communication  is  now
       relayed and shown in the screen on real-time.

       tag <---> initiator (relay) <---> target (relay) <---> original reader

OPTIONS

       -h
           Help
           List options

       -q
           Quiet mode
           Suppress printing of relayed data (improves timing)

       -t
           Target mode only (to be used on reader side)
           Commands are sent to file descriptor 4
           Responses are read from file descriptor 3

       -i
           Initiator mode only (to be used on tag side)
           Commands are read from file descriptor 3
           Responses are sent to file descriptor 4

       -s
           Swap roles of found devices
           Usually the first found device is used as target (emulator) and the second
           as initiator (reader). Using this option these roles are inversed.

       -n N
           Adds a waiting time of N seconds (integer) in the loop

EXAMPLES

       Basic usage:

         nfc-relay-picc

       Remote relay over TCP/IP:

         socat
           TCP-LISTEN:port,reuseaddr
           "EXEC:nfc-relay-picc -i,fdin=3,fdout=4"
         socat
           TCP:remotehost:port
           "EXEC:nfc-relay-picc -t,fdin=3,fdout=4"

NOTES

       There are some differences with nfc-relay:

       This  example  only  works  with  PN532  because  it  relies  on  its internal handling of
       ISO14443-4 specificities.

       Thanks to this internal handling & injection of WTX frames, this example works on  readers
       very strict on timing.

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.

       This manual page is licensed under the terms of the GNU GPL (version 2 or later).