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

Dave Baxter dave at emv.co.uk
Wed Aug 23 04:12:10 CDT 2006

Correct.  There is a geekey website about it all if you search for it (I
lost the link with the old hard drive)...  OnStar do not use NMEA
internally.  I think if you add BMW to the search it may help..

I think there was a link to it from this list some months back?  The
article had pictures of how to dismantle the OnStar boxes and all that

Dave G0WBX.

> -----Original Message-----
> From: Ron McCoy [mailto:rmccoylist at blueantservices.com] 
> Sent: Tuesday, August 22, 2006 5:13 PM
> To: 'TAPR APRS Mailing List'
> Subject: RE: [aprssig] Tap into in-dash GPS Navigation for APRS?
> 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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