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[aprssig] APRS RFID apps? (spec rev2)

Bob Bruninga bruninga at usna.edu
Fri Feb 12 13:24:39 UTC 2010


Patrick,

Also, I notice that the RFID tag says it has 32 bit tag range, but the protocol of the RFID reader reports the tag as five  8 bit bytes.  If we only need 4 bytes, then I can compress the entire tag space into the TOCALL alone, and make the packet shourter...

Can y ou resolve this?

thanks
Bob, WB4APR


---- Original message ----
>Date: Thu, 11 Feb 2010 13:08:00 -0500
>From: aprssig-bounces at tapr.org (on behalf of Patrick <winston at winston1.net>)
>Subject: Re: [aprssig] APRS RFID apps? (spec rev2)  
>To: TAPR APRS Mailing List <aprssig at tapr.org>
>
>First off the amusing point..  Remember that pet microchips are RFID  
>tags which are I believe are compatible with the readers you are  
>looking at..  Finally an easy way to APRS enable your pets.
>
>The one thing which hasn't been discussed, but should be is that there  
>are RFID tags which use different protocols even if they are in the  
>same bands..  Thus far we've been discussing specific readers and tags  
>from sparkfun, however in the bigger world there are people who will  
>try different methods and different tags..  There may be frustration  
>from people who try this in their local area with materials sourced  
>elsewhere and then arrive at Dayton to find that their local materials  
>do not work with the Dayton readers.  You should likely add the  
>protocols and frequencies of recommended tags (beyond linking to 3rd  
>party site which could end up with completely different products if  
>they decide to reline their online store.
>
>p
>
>Quoting Bob Bruninga <bruninga at usna.edu>:
>
>> Here is a rev2 of the spec based on some good feedback from Wes:
>>
>
>
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