[aprssig] APRS RFID apps? (Hot Spots design!)
bruninga at usna.edu
Wed Feb 10 12:10:45 CST 2010
> If you wan IN and OUT at the door,
> why not use those little keyfob data
> modems on 433mhz from the reader
> to the processor?
Good idea. But, we'd need and indoor range through several walls over half the distance of the indoors a Dayton, and in that RF environment, we'd need something a little longer range than a key fob. You have any other XMTR's in mind?
I was thinking about a mircrotracker from Byonics or similar tracker type device from Argent Data Systems?
Esp if there's a checksum
> On Wed, Feb 10, 2010 at 12:13, Bob Bruninga
> <bruninga at usna.edu> wrote:
> The RAW output from the RFID reader is:
> Where S is STX (02h)
> DDDDDDDDDD are 5 bytes in 10 ASCII HEX characters
> KK is a HEX checksum
> C is CR and L is LF and E is ETX.
> I guess the easiest packet format (this will
> probably be on a separate freq) would be:
> Where the SSID of the hotspot reader (I) can
> contains 4 bits of additional info such as
> direction, speed, etc. The initial "R" will make
> this an ALTNET (non-APRS) packet if in some simple
> locations the RFID reports are on the APRS channel
> for simplicity.
> Are we missing anything?
> Bob, WB4APR
> ---- Original message ----
> >Date: Wed, 10 Feb 2010 11:54:12 -0500 (EST)
> >From: aprssig-bounces at tapr.org (on behalf of "Bob
> Bruninga " <bruninga at usna.edu>)
> >Subject: Re: [aprssig] APRS RFID apps? (Hot
> >To: "TAPR APRS Mailing List" <aprssig at tapr.org>
> >In/OUT Hot Spots:
> >And if we wanted to, we could have two hot spots
> at each door. One labeled APRS IN and the other
> >Here is the design of the hot-spot processor:
> >1) The hot spot has its own 6 letter/digit call.
> >2) It encodes the passing RFID into the TOCALL of
> a packet
> >3) The transmission then is extremely short.
> >4) A central PC somewhere has a keyboard to let
> people enter their callsign. Probably at the
> point-of-sale of the RFID card for $2. This PC:
> > A) asks for the callsign of the person holding
> the card
> > B) Builds the file of all associations
> > C) Has the exact location of the RFID readers
> > D) Hears the packets from the readers, makes
> the association and then IT originates the APRS
> packet for that callsign at that location onto the
> APRS channel.
> >We may as well put the RFID readers on their own
> frequency to avoid congestion in getting the
> passing tag info to the central reader.
> > E) The file of RFID/callsign associations is
> made available worldwide.
> > F) Since the APRS packet that results from the
> RFID tag will be in a standard format, and will
> contain the RFID number too, and will appear
> eventually on the APRS-IS, then data bases
> worldwide in real-time can be gathering the
> associations as well.
> >Wow, this can work, and will make a great club
> > G) For clubs that bring lots of folks to
> Dayton that have all brought their own RFID boots,
> one member of the club can bring a standard FILE
> of associations to the central PC and associate
> everyone at once! And our club always maintins
> its own awning-lounge area in the flea market area
> and would bring its own HOT SPOT so that when some
> relaxes there, everyone else can know...
> >Since I already developed a data-base last year
> that maps every fleamarket space to a lat/long
> position, someone placing a hot spot would only
> need to enter its space number to configure it for
> > H) therefore there are two formats for the
> READER-to-central packet. One needs no position,
> beacuse the hot spot is at a fixed location loded
> into the central PC. But another format is
> needed for a frequently moving hot spot that would
> include its present position as well.
> > I) Soccre Ball RFID reader: Shucks, you
> could put a GPS in the hot spot and put it in a
> soccer ball and let people kick it anywhere they
> want. When their foot hits it, we record their
> position! Tihs game for APRS users only of
> >Bob, Wb4APR
> >>APRS RFID Hot Spots!
> >>PROBLEM SOLVED! I was pondering how we would
> possibly cover all the big doors at Dayton with
> APRS RFID readers and then it hit me. We Don't
> have to cover the whole door. And we only need
> one tiny coil...
> >>We just put it in a 1 squarefoot bright yellow
> MAT with APRS in red written on it. It is an
> APRS hot spot. If you want to be seen at that
> location, swing your foot over the spot...
> >>What we were overlooking is that APRS hams are
> not passive players, they are active participants
> and will be happy to swing their foot over a known
> hot spot (or avoid it if they are not where they
> are supposed to be).
> >>This solvles ALL the logistics problems I can
> think of. The big breakthrough was Patrick
> suggesting we put the cards in our shoe, now this
> final breakthrough solves the range and coverage
> problem completely.
> >>As to applications, I can think of nothing on
> earth better than Dayton. The naysayers will say
> but what value is it... And I say, because its
> fun to do!
> >>APRS Hot SPots at Dayton... Those people with
> APRS booths could put one in front of their
> table... etc.. Or at entrances to the Forums...
> or anywhere that APRS people might congregate...
> >>Bob, WB4APR
> >>---- Original message ----
> >>>Date: Mon, 8 Feb 2010 00:24:37 -0500 (EST)
> >>>From: aprssig-bounces at tapr.org (on behalf of
> "Bob Bruninga " <bruninga at usna.edu>)
> >>>Subject: [aprssig] APRS RFID apps?
> >>>To: aprssig at tapr.org
> >>>Now that we realize we can make APRS track
> anyone with a $2 credit card RFID in his boot, I
> have been wearing this credit card in my shoe for
> a week and can't even tell it is there any longer
> (after the first hour or so...)
> >>>But what for? I had some sample ideas, and
> figured once we figured out how to do it, an
> avalanche of other applications would pop up...
> But after a week or so, I'm making little
> progress. Here are the only apps I have come up
> >>>1) At clubhouse door
> >>>2) at EOC door (city, county and state)
> >>>3) At local HAM store
> >>>4) At Dayton doors in each room
> >>>5) Just for fun with a mat in front of your
> fleamarket space to see who walks by?
> >>>Of local ham events, I also don't see an
> immediate app. The hams dont move much. The
> event participants do. And they are either in
> the thousands (runs) or out of reach... (or
> already have RFID (MARATHONS).
> >>>Although a few of the dedicated volunteers that
> show up at all EOC tests might consider it, I cant
> see getting more than a yawn from the rest of a
> >>>Any other knock-em-dead apps I'm missing?
> >>>Bob, WB4APR
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