[Geowanking] low cost gps location broadcasting hw / sw

Stewart Long stewart at gonzoearth.com
Tue Feb 1 10:29:43 PST 2011


An additional Arduino example. Arduino might be the best way to go for low
cost, customization, and the explicit capabilities.
http://publiclaboratory.org/tool/balloon-telemetry-kit
<http://publiclaboratory.org/tool/balloon-telemetry-kit>

<http://publiclaboratory.org/tool/balloon-telemetry-kit>
On Tue, Feb 1, 2011 at 9:47 AM, Miten Sampat <miten at mitensampat.com> wrote:

> Another option is to look at building it with Arduino and one of the GPS
> modules that go with it.
>
> More on HTTP://www.arduino.cc
>
> Goodluck,
> Miten
>
> miten sampat | HTTP://about.me/mitensampat
> On Feb 1, 2011 9:44 AM, "Brian Russo" <brian at beruna.org> wrote:
> > In the volumes you'd be purchasing you can get OEM GPS devices with a
> > usb or RS232 interface for around $30-35.
> >
> > Battery life is going to be simply dependent on the size of the battery
> > I wouldn't bother with buttons, just have it start feeding when the
> > power source is connected. Or implement a switch. There's no reason to
> > have it on when it's not doing anything.
> >
> > Accuracy is a function of many things, but CEP <30m is quite
> > achievable with even the cheapest OEM device under most circumstances.
> >
> > I doubt you're going to be able to build one with a transmitter for
> > <$50 in small volumes though. It's not really sensible engaging in R&D
> > for something like this unless you have specific requirements or are
> > going to build large volumes. Too much hassle unless you're going to
> > build hundreds or have unusual requirements (size, form factor, etc).
> >
> > You can get little zoombak trackers or garmin gps dog collars for
> > around $80-100. There are many systems like this (just google gps
> > tracking beacon or something), most involve a subscription around
> > $10-15/month. That's probably your best bet.
> >
> > Here's an example - http://www.zoombak.com/products/universal/
> >
> > - bri
> >
> > On Tue, Feb 1, 2011 at 7:24 AM, Paul Faunik <paulfaunik at gmail.com>
> wrote:
> >>
> >> I'm looking to build a location transmitter that would have the
> following
> >> constraints
> >>
> >> - low cost (sub $50) for the hw
> >> - long battery life. based on the device broadcasting location every 5
> min
> >> and doing nothing else. days between charges?
> >> - two simple buttons : start broadcasting : stop broadcasting
> >> - the geo coordinates are relatively accurate most of the time - 30
> meters
> >> (used almost exclusively outdoors in San Francisco)
> >>
> >> One thought is it could some super cheap older model cell phone, some
> simple
> >> native app to send geo coords to web service or send sms (if this
> >> circumvents a data plan), super cheap pay as you go phone plan, put it
> all
> >> in a box and just expose two buttons and the charging plug.
> >>
> >> Other alternatives?
> >>
> >> Anyone ever built or heard of such a project?
> >>
> >> thanks,
> >>
> >> Paul
> >>
> >>
> >> _______________________________________________
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> >>
> >>
> >
> >
> >
> > --
> > Brian Russo / (808) 271 4166
> >
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>
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