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Light RP

1 Embedded Light RP

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1.1 Introduction
This section describes the Embedded light RP developed by the POPS team, Inria-Lille. This software can be easily implemented in mobile terminals such like PDA to interact with RFID Reader devices.

The implementation is divided into two subsets : RP API definition and core implementation for CAEN and BRI readers.

The targeted RP architecture is the following :
* One Reader Device : singleton representing the RFID reader device.
* One Source : representing the PDA as a mobile source for reading tags.
* One Read Point : representing the unique  ANTENNA of each PDA.
* One Data Selector : the default one, with EPCID field selection only.
* No Tag Selector : The filtering is done by software at upper levels.
* No Notification Channel : The inventory is done synchronously with a specified time-out per read cycle.
* No triggers : the only Read Trigger is implicitly fired when calling the method Source.rawReadIDs.

The implementation is performed as follows (example for BRI, idem. for CAEN):

<center>
<a href="http://wiki.aspire.ow2.org/xwiki/bin/download/Main.Documentation/LightRP/BRI_implementation.png">{image:BRI_implementation.png|250}</a>
</center>

1.1 Users & Developers Guide

The executable jar file can be found under the repository ReaderProtocol/dist.
All the source can be found under the repository ReaderProtocol/src.

Here is an example of Inventory of tags in reader's field:

{code:java}
// Reader singleton 
ReaderDevice myReader = 
             ReaderFactory.getReader(ReaderFactory.BRI_READER,"BRIReaderDevice");

// Reader's default source and data selector
Source mySource; 
DataSelector myDataSelector;

// Establish Connections 
ReaderFactory.connectReader(myReader);

// Reader's Data Selector : default singleton for selecting IDs 
// This is is the default data selector that supports at least the tag ID field 
// get Default Data Selector and update it 
myDataSelector = myReader.getCurrentDataSelector();

// Reader's source : Singleton 
mySource = myReader.getCurrentSource(); 
 
// Perform 10 read cycles 
for( int i = 0; i < 10 ; i++) { 
        System.out.println("Read Cycle " + i + " at " + 
				    myReader.getTimeTicks() + " ticks");

// Inventory 
        ReadReport myReadReport = mySource.rawReadIDs(myDataSelector);

if (myReadReport == null) { 
                System.err.println("Error : mySource.rawReadIDs null report "); 
        } 
        else { 
                // Display read Tags (ids in hexadecimal)
                String[] tagIds = myReadReport.getTagIds(mySource.getName()); 
                if (tagIds == null) { 
                     System.err.println("Error : myReadReport.getTagIds null "); 
                } 
                else if (tagIds.length == 0) { 
                     System.out.println("\t NO TAGS"); 
                } 
                else { 
                     for(int j = 0 ; j < tagIds.length; j++) 
                          System.out.println("\tObserved : 0x" + tagIds[j]); 
                } 
        } 
}

// graceful disconnect : equivalent to ReaderFactory.disconnectReader(myReader); 
myReader.goodbye();

{code}

1.1 Download

You can download the executable jar file from [here>http://forge.ow2.org/project/download.php?group_id=324&file_id=15239]. The source can be found  [here>http://websvn.ow2.org/listing.php?repname=aspire&path=/trunk/servers/AspireRfidALE/LightALE/LightRP/].

Please follow the [Users & Developers Guide>http://wiki.aspire.ow2.org/xwiki/bin/view/Main.Documentation/LightRP#HUsers26DevelopersGuide] for your tests.

More details about the complete version of Light ALE (with light RP embedded) can be found [here>http://wiki.aspire.ow2.org/xwiki/bin/view/Main.Documentation.Filtering%26Collection/EmbededALE].