[aprssig] Simple APRS module to use with Arduino

Kenneth Finnegan kennethfinnegan2007 at gmail.com
Fri Oct 14 10:35:47 CDT 2016


Even just Argent offers several prebuilt solutions for <$50.

* Tracker3 Mini, $34 each for a dozen of them:
https://www.argentdata.com/catalog/product_info.php?products_id=167
* The Radio shield, $22 each at dozen quantity:
https://www.argentdata.com/catalog/product_info.php?products_id=136

Which leave another ~$20 for a TTL GPS receiver, which is not problem on
eBay. If you want that to be turn key as well, the T3-Micro comes with the
GPS integrated for $65:
https://www.argentdata.com/catalog/product_info.php?products_id=170

--
Kenneth Finnegan
http://blog.thelifeofkenneth.com/

On Fri, Oct 14, 2016 at 5:22 AM, John Gorkos <jgorkos at gmail.com> wrote:

> You're probably not going to find a built solution for $50.  There's
> just no margin in building small runs of APRS devices, and very little
> market for large runs.
>
> Your best bet would be a custom board built for task.  If you're going
> to build a dozen of them, you can get enough discount on parts to do
> them for <$50 each.
>
> I would start here:
> http://garydion.com/projects/whereavr/
>
> That's a basic AFSK modem that encodes using a resistor ladder and
> decodes using a basic interrupt-driven zero-crossing decoder.  It speaks
> KISS, but a smart guy would port this to a Teensy with its vastly
> greater processing power, and write a simple interface around it. It
> takes NMEA from an external serial port.  You didn't mention anything
> about a GPS module.  EBay is full of Ublox Neo 6M modules for under $10.
>  The Teensy is $20 from LadyAda.  You'd probably want to spin a custom
> "shield" board to mount to the Teensy, where you can mount some screw
> terminals or a 3.5mm phono jack, your resistor ladder, your voltage
> divider for the receive side, some LEDs, etc.  In quantity 12, you can
> get a dozen double sided boards made for <$100, so board cost is under
> $9.  The misc parts would probably fill out the remaining $11.  The cool
> part is the Teensy has a very nice voltage regulator built in, since it
> likes to be fed from a USB port.
>
> Of course, I'm assuming your time is free.  The software is going to
> take time.  The basic transmitter and receiver code can be borrowed from
> Gary Dion's project, but if you want a KPC-2-style interface, that's
> going to take time.  Assembly is going to take time.  Assembly and final
> programming would be a great club project, since you could do it all
> with through-hole components.
>
> Just some thoughts.
> John Gorkos
>
> On 10/14/16 1:54 AM, Jim (List) wrote:
> > Thanks, but that’s way out the price range.
> >
> >
> >
> > I’m looking at a built solution (without radio) for about $50.
> >
> >
> >
> >
> >
> >
> >
> > Jim
> >
> >
> >
> >
> >
> > *From:*Robert Bruninga [mailto:bruninga at usna.edu]
> > *Sent:* 13 October 2016 22:56
> > *To:* Jim (List)
> > *Subject:* RE: [aprssig] Simple APRS module to use with Arduino
> >
> >
> >
> > Sure, the Byonics.com Mircotrack  MTT4B and it includes a 10W
> transmitter.
> >
> > bob
> >
> >
> >
> > *From:*aprssig [mailto:aprssig-bounces at tapr.org
> > <mailto:aprssig-bounces at tapr.org>] *On Behalf Of *Jim (List)
> > *Sent:* Thursday, October 13, 2016 2:49 PM
> > *To:* TAPR APRS Mailing List
> > *Subject:* [aprssig] Simple APRS module to use with Arduino
> >
> >
> >
> > I’m looking for an APRS add-on module to use with Arduino, providing
> > simple TX and RX of APRS beacons.
> >
> >
> >
> > It will primarily be sending messages, but ability to also receive would
> > be useful so it can get the message ack.
> >
> >
> >
> > Cost is a factor as, if the project is successful, I’ll be looking to
> > build about a dozen units.
> >
> >
> >
> > I’m aware of the Argent Data Shield, wondering if there is anything else
> > out there.
> >
> >
> >
> >
> >
> >
> >
> > Jim, G1HUL
> >
> >
> >
> > _______________________________________________
> > aprssig mailing list
> > aprssig at tapr.org
> > http://www.tapr.org/mailman/listinfo/aprssig
> >
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