Personally, I don't have a Nuvi. Maybe at some point I will add it, but not today. Since I just realized (again, duh!) the GTRANS connects into the Nuvi, the GTRANS with all its cabling will not work as imagined, but, I imagine it wouldn't take much if it doesn't. I seem to recall chatter about hardware inside the Garmin cable, too. That is okay. The data still gets into the T2 and it is there in two signal levels; one RS232 and the other TTL. The TTL signal is perfect! If the TTL level is fed to the processor on the GTRANS then all the level shifting stuff goes away. Since I only want NMEA out, and the GTRANS would be inside the T2, power on/off is all the same for both. Therefore, the timing mentioned earlier should be okay. Of course this is all theory. ;) Well, actually my ideal is more like: in addition to the T2 normal functions, GPS data (NMEA or Garmin protocol) is passed bi-directionally through the T2. I guess that makes it a GPS router, too. But I am not asking! Even if it did, I am not sure how to use it right now. Hmm. Thanks! Best regards, Fred
_____ From: [email protected] [mailto:[email protected]] On Behalf Of k7ybz Sent: Thursday, September 24, 2009 15:41 To: [email protected] Subject: [tracker2] Re: Garmin and NMEA Data from Nuvi 350? Just make sure you only have one device with the ID resistor otherwise the Nuvi will not recognize what device is connected. Even then, the load on the USB side, since this is the side that needs to be in parallel, may be a bit too much for a good signal out of the Nuvi. You may need to think about suppling power to the GTRANS cable from a source other than the Nuvi too. The Nuvi can accept upto 500 ma for its own use (battery charging through the data port), but only supplies a limited amount of current (through current limiting circuitry) to external devices even with power connected to the back of the unit. The ideal would be a serial splitter where both TX/RX would go to the T2 and the TX out to a Garmin to NMEA converter for single ended use. New product Scott? The clouds have lifted. Time to go back outside and play photographer on the beach. Larry K7YBZ --- In track...@yahoogroup <mailto:tracker2%40yahoogroups.com> s.com, "Fred Hillhouse" <fmhillho...@...> wrote: > > It could make for an easy way to get NMEA out of a T2 while connected to a > GPS running the Garmin protocol. It the PCB was tacked down inside, a cable > with a connector could come out the 'power' hole. > > Ok, I want just the PCB! (loaded of course). :) > > I haven't been following the GTRANS information really at all. Can I select > only the sentences I am interested in? Just curious, not a requirement. > > > Thanks!
