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[aprssig] Tap into in-dash GPS Navigation for APRS?

Ron McCoy rmccoylist at blueantservices.com
Tue Aug 22 16:13:01 UTC 2006


My understanding is that you can access the GPS signal by breaking into the
box but that you have to play with the firmware to change from a proprietary
protocol to NEMA, and that breaks the normal OnStar functionality.



-----Original Message-----
From: aprssig-bounces at lists.tapr.org [mailto:aprssig-bounces at lists.tapr.org]
On Behalf Of Tyler Allison
Sent: Tuesday, August 22, 2006 11:57 AM
To: TAPR APRS Mailing List
Subject: Re: [aprssig] Tap into in-dash GPS Navigation for APRS?

> Has anyone had success finding a serial port on an OEM in-dash
> navigation system?  In my case it is in a Dodge and I have found that
> the manufacturer is Alpine.  I haven't had an opportunity to take it
> out to see if it has a serial connector on the back.  I doubt that I
> will get that lucky, but maybe there are serial pinouts somewhere
> inside the unit.  Has anyone explored this?

I know folks have been able to tap into the OnStar system's GPS unit so I
would suspect it's gotta be doable if you can find the right pins.

-Tyler



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