---
name: "Biblio::RFID::RFID501"
section: "3pm"
platform: "linux"
package: "libbiblio-rfid-perl"
version: "0.05-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Biblio::RFID::RFID501"
---

# Biblio::RFID::RFID501(3pm)

RFID Standard for Libraries

## 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;
```