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nfc-relay-picc(1)		  NFC Utilities 	       nfc-relay-picc(1)

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  han-
     dling 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), ver-
     sion 3.
     libnfc-utils and libnfc-examples are covered by the the  BSD  2-Clause  li-
     cense.

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

libnfc				October 12, 2010	       nfc-relay-picc(1)

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