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2914Re: Garmin Nuvi 350 and T2

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  • Jim
    Feb 8, 2008
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      Scott, I tried to purchase the cable from Garmin, # 010-10813-00 and
      Garmin won't sell to Canada. Will you be able to get these cables and
      sell them yourself? I checked other sites and no one seems to have
      them in stock.

      Thanks...

      jim
      VE7JSE


      --- In tracker2@yahoogroups.com, Scott Miller <scott@...> wrote:
      >
      > Certainly not in exactly the same way (it's a Garmin proprietary
      > protocol) but that's not to say they don't have some interface for AVL
      > or fleet management. If someone wants to look that up, I'll be
      happy to
      > support what I can.
      >
      > If it's anything complicated, it's going to have to be in a separate
      > firmware load, I think. Every time I hit the 'make' key these days, I
      > cringe, waiting for the dreaded 'out of allocation space in segment
      xxx'
      > linker error that means I've run out of room.
      >
      > That doesn't mean the end of T2 improvements, it just means that I get
      > to spent a lot more time optimizing existing code before I can add new
      > stuff. Rewriting some of the trig functions already bought me some
      > breathing room, but I'm going to have to tackle other bits of bloat
      > before long.
      >
      > Scott
      >
      > Steve wrote:
      > >
      > >
      > > Scott,
      > >
      > > Do you know if the TomTom Go920 is possible to access in the same
      way as
      > > the Garmin Nuvi you mentioned below??
      > >
      > > It has a (what I call) mini usb to interface with either a charger
      or a
      > > PC for programming.
      > >
      > > This GPS is loaded with some very neat features and if it was
      possible
      > > to interface that to a Kenwood D700 or D710 I would have gone to APRS
      > > heaven!!
      > >
      > > I already tried out a Garmin StreetPilotĀ® c530, and while I made no
      > > attempt to use it for APRS and also a TomTom one xl and a low end
      > > Magellan 3100, they all seem to have this mini usb port on them!
      > >
      > > If there is anything more you need to know about the TomTom GO920
      please
      > > let me know and I will attempt to furbish you that info the best I
      can!!
      > >
      > > 73
      > > Steve, kf6wax
      > >
      > >
      > >
      > > On Jan 31, 2008 11:06 PM, Scott Miller <scott@...
      > > <mailto:scott@...>> wrote:
      > >
      > > I discovered something interesting today. Here I've been
      telling people
      > > all along that the newer USB-only Garmin receivers like the
      Nuvi are
      > > worthless for APRS. Turns out I was wrong.
      > >
      > > When I heard about Garmin's fleet management interface, I
      decided it'd
      > > be worth checking out. It needs a special cable, though - for
      the Nuvi
      > > 350 I picked up, it's Garmin p/n 010-10813-00. By the looks of
      it, it's
      > > probably just got a level converter inside, but I'm not sure.
      > > Apparently there's a serial interface of some sort that can
      share the
      > > USB connector.
      > >
      > > The fleet management protocol looked suspiciously like a subset of
      > > Garmin's regular binary serial protocol, so (once I figured
      out the
      > > cable pinouts and soldered on a DB9) I fired up the test
      program I'd
      > > written, and sure enough, it spit out a list of supported
      protocols.
      > >
      > > I plugged it straight into a stock Tracker2 and the activity light
      > > started blinking green, showing a good fix. I piped in some
      recorded
      > > APRS traffic and the map screen started showing APRS stations.
      Here are
      > > some pictures I took (haven't tried the screen capture program
      yet):
      > >
      > > Map screen (2D mode): http://n1vg.net/images/nuvi-map.jpg
      > > <http://n1vg.net/images/nuvi-map.jpg>
      > > Waypoint list: http://n1vg.net/images/nuvi-list.jpg
      > > <http://n1vg.net/images/nuvi-list.jpg>
      > > Station detail: http://n1vg.net/images/nuvi-detail.jpg
      > > <http://n1vg.net/images/nuvi-detail.jpg>
      > >
      > > It's not perfect - the waypoint set is different, for one. You
      can see
      > > that all of the cars are now up on lifts with the hood up! The
      digis do
      > > show up as antenna towers, at least, and the houses are there.
      I'll
      > > have to find out if it'll take custom symbols. Also, it seems
      to have
      > > some quirks about showing waypoints at different zoom levels.
      > >
      > > The Nuvi 350 has a USB port on the side and another one on the
      clip-on
      > > base, so you can power it and plug it in to the tracker at the
      same
      > > time. When I find out how the serial interface adapter works,
      I'll see
      > > if I can power it from the tracker, or maybe vice versa. I'll
      also see
      > > about a cheaper substitute for the cable - this one cost me
      $30 after
      > > shipping. It probably wouldn't be hard to build an equivalent
      circuit
      > > into a DB9 shell.
      > >
      > > The bad news is that the OT2m is totally sold out right now.
      My only
      > > two spares are going out for CE EMC certification shortly. The
      factory
      > > producing the boards is snowed in right now and hasn't even been
      > > able to
      > > get the parts for the next batch - DHL's had them sitting at
      the depot
      > > for days. It'll probably be the end of February before I have
      any more.
      > > The T2-135 is shipping, albeit slowly due to limited production
      > > capability here.
      > >
      > > Hopefully by the time the boards come in I'll have figured out
      all of
      > > the Nuvi's quirks and dealt with them. I also hope to make
      some use of
      > > the fleet management interface for some new features. Most
      importantly
      > > - it does text messaging.
      > >
      > > Scott
      > >
      > >
      > >
      >
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