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[aprssig] APRS Telemetry

Phillip B. Pacier ad6nh at arrl.net
Wed Sep 6 15:32:59 UTC 2006

Hi Bob.  I think this is a great idea, though I'm wondering about 
stations such as Digipeaters how changing the symbol is going to help 
overall network recognition.  What is more important?  Knowing that the 
station is a functioning digipeater, or knowing by it's symbol that it 
is off grid?

W7RBV-2 is a solar-powered digipeater in Southwest Nevada.  I have 
voltage telemetry coming from it, but I have not yet been able to do 
current or temperature telemetry.  I might attempt that again in the 
near future.  Telemetry is currently compiled and shown at 

If you need any more information for your database, let me know!

Phil - AD6NH

Robert Bruninga wrote:
> I'm considering a new Symbol for APRS to represent alternative
> power
>  systems, so that owners can monitor their off-grid power
> systems in
>  a standard way remotely.  Also, then we can make summaries of
>  users contributions to alternative energy.  Here are some of
> the
>  ideas I am considering:
> 1) Alternative energy symbol (with overlay for Wind, Thermal,
> Water or Sun)
> 2) Standard telemetry formats using the existing KPC-3+ five
> channel packets
> 3) TOCALL version numbers to match the formats so that parsers
> can display
>    end units wihtout any other info.
> For this purpose, I would like to build a table of all existing
> KPC-3+ telemetry 5-channel systems so we can see if some
> standards exist.  
> Here are 3 that might be useful for alternative energy systems:
> 1) System Volts,  Charge Current,  Load Current,  Panel
> Temperature, Indoor temp
> 2) System Volts,  Charge Current,  Load Current,  Battery
> Current,  Temp
> 3) System A volts,  System A current,  System B volts,  System B
> current, Temp
> Each of these would have a different APExxx version number, so
> that decoding
> Systems can decode and display them without any other
> knowledge...
> Anyone that is running off-grid or with alternative energy
> systems of any
> Kind, I would like to hear from you as well, even if you are not
> using a
> KPC-3+ for telemetry...
> Bob, WB4APR

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