LLRP defines tag seen count as the number of times the reader has seen the tag.
If you were to add up all the tagSeenCounts for all the tag reports and then
divide by report interval (10 seconds in your case), you would know the read
rate in observations/second.
________________________________
From: Atul Ingle [mailto:[email protected]]
Sent: Tuesday, November 24, 2009 3:23 PM
To: LLRP Toolkit Development List
Subject: Re: [ltk-d] LLRP with Impinj Speedway
Hello,
Thanks for the help. I'm getting to grips with LLRP commander to log the tag ID
and readrate/RSSI data. I am using a 10second delay stop trigger for
ROSpecStopTrigger and I get an RO_ACCESS_REPORT which contains the tag ID and
RSSI. But I'm not too sure what TagSeenCount exactly means. Can I use it to
calculate the read rate? I tried increasing the receiver sensitivity and
transmitter power level but it doesn't affect the RSSI or the TagSeenCount in
any way. What I would like to log is the "Read Rate" values I get when I use
the web interface for the Speedway reader using RFIDemo.
Thanks again,
Atul Ingle
On Thu, Nov 19, 2009 at 3:25 AM, Bashir Khoshnevis
<[email protected]<mailto:[email protected]>> wrote:
Hi Atul
Here is my sample code for Impinj Speedway ( c#.net )
http://bash.ir/RF_IV/GUIDemo.zip
On Thu, Nov 19, 2009 at 2:56 AM, Christian Floerkemeier
<[email protected]<mailto:[email protected]>> wrote:
Atul,
Example code that shows how to use the java implementation of the LLRP
toolkit can be found in the wiki:
http://sourceforge.net/apps/mediawiki/llrp-toolkit/index.php?title=LTKJava
If you don't want to write any Java code, you can also use the Fosstrak
LLRP Commander (http://www.fosstrak.org/llrp) that uses LTKJava and logs
all individual TAG_REPORT_DATA parameters in RO_ACCESS_REPORT messages
to a SQL database (either a built-in one or a DB of your choice). You
can then just use the built-viewer to check the "cumulative read number"
or issue SQL statements over the TAG_REPORT_DATA parameters to
determine the number of reads.
Christian
Atul Ingle wrote:
> Hello,
> I am using the Impinj Speedway R1000 reader.
> I have to make a program code which can get information about individual
> tags (tag ID and number of reads) and write it to a log file. So far I
> have been using the reader command line with a serial interface to get
> the "cumulative" read number for all tags around the antenna. But the
> serial interface does not give me any info about tag IDs.
> Where do I get started writing a Java code to do this?
> Thanks,
> Atul Ingle
>
> --
> Atul Ingle
> RFID Project Assistant | www.uwrfidlab.org<http://www.uwrfidlab.org>
> <http://www.uwrfidlab.org>
> UW E-Business Consortium | www.uwebc.org<http://www.uwebc.org>
> <http://www.uwebc.org>
> University of Wisconsin-Madison | www.wisc.edu<http://www.wisc.edu>
> <http://www.wisc.edu>
> Ph# 1-408-823-7537
>
>
> ------------------------------------------------------------------------
>
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RFID Project Assistant | www.uwrfidlab.org<http://www.uwrfidlab.org>
UW E-Business Consortium | www.uwebc.org<http://www.uwebc.org>
University of Wisconsin-Madison | www.wisc.edu<http://www.wisc.edu>
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