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[aprssig] Future for aprs Faster, cheaper and now!

Scott Miller scott at opentrac.org
Sun Sep 9 02:30:56 UTC 2012

I've been playing with the 500 mW RFM12BP modules for a while.  I've got 
prototype boards with OpenTracker USBs built in.  They're not going to 
replace VHF APRS, but I'm very interested in their potential for special 
event tracking.

If there's going to be any serious use of these, we need a standard. 
Right now I'm using 4800 baud with Hamming(7,4) error correction and 
very basic framing.


On 9/8/2012 11:35 AM, Robert Bruninga wrote:
> New for APRS mobile?  How about a $12 transceivr that is as sensitive as
> any modern APRS radio, is frequency agile and has 100 mw TX power
> operating on UHF?
> It can operate anywhere from 2400 to 100Kbaud on 2 AA cells.  I can
> imagine an APRS distributed mobile data network that can handle 100
> times more mobiles plus high data rate transfer of images for better
> first responder and emergency support type communications.
> I'm sure someone has suggested these modules in the past, but I just
> looked at the specs and am AMAZED at what they have crammed into this
> POSTAGE STAMP sized UHF transceiver.
> Stuart Robinson in the UK just turned me on to his project to use these
> modules in small satellties and balloons, but I can envision a
> "digipeater node" in evry neighborhood, building, tower and hill
> providing a dense high speed amateur data network!  Just hook it to a
> pic processor for the smarts and make it work!
> The RFM22 can use any frequency 240mhz to 930mhz, its available in
> versions with the antenna matching centred on 315mhz, 434mhz, 868mhz and
> 915mz. The RFM22 is a transceiver, costs around $12.
> Seems like everything is there!  Go for it!
> Bob, Wb4aPR,
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