NAME

       Biblio::RFID::RFID501 - RFID Standard for Libraries

DESCRIPTION

       This module tries to decode tag format as described in document

         RFID 501: RFID Standards for Libraries

       <http://solutions.3m.com/wps/portal/3M/en_US/3MLibrarySystems/Home/Resources/CaseStudiesAndWhitePapers/RFID501/>

       Goal is to be compatible with existing 3M Alphanumeric tag format which, as far as I know,
       isn't specificed anywhere. My documentation about this format is available at

       <http://saturn.ffzg.hr/rot13/index.cgi?hitchhikers_guide_to_rfid>

Data model

   3M Alphanumeric tag
        0   04 is 00 tt   i [4 bit] = number of item in set    [1 .. i .. s]
                          s [4 bit] = total items in set
                          tt [8 bit] = item type

        1   dd dd dd dd   dd [16 bytes] = barcode data
        2   dd dd dd dd
        3   dd dd dd dd
        4   dd dd dd dd

        5   bb bl ll ll   b [12 bit] = branch [unsigned]
                          l [20 bit] = library [unsigned]

        6   cc cc cc cc   c [32 bit] = custom signed integer

   3M Manufacturing Blank
        0   55 55 55 55
        1   55 55 55 55
        2   55 55 55 55
        3   55 55 55 55
        4   55 55 55 55
        5   55 55 55 55
        6   00 00 00 00

   Generic blank
        0   00 00 00 00
        1   00 00 00 00
        2   00 00 00 00

Security

       AFI byte on RFID tag is used for security.

       In my case, we have RFID door which can only read AFI bytes from tag and issue alarm sound
       or ignore it depending on value of byte.

       0xD7 214
               secured item (door will beep)

       0xDA 218
               unsecured (door will ignore it)

METHODS

   to_hash
         my $hash = Biblio::RFID::Decode::RFID501->to_hash( $bytes );

         my $hash = Biblio::RFID::Decode::RFID501->to_hash( [ 'blk1', 'blk2', ... , 'blk7' ] );

   from_hash
         my $blocks = Biblio::RFID::Decode::RFID->from_hash({ content => "1301234567" });

   blank_3m
   blank
         my $blocks = Biblio::RFID::Decode::RFID->blank;