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Re: [tracker2] Re: T2-301 + Nuvi 350

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  • Scott Miller
    I had Keri reformatting and editing the manual. It came out a lot better, but some of it got screwed up in Word version conversions or something and needs to
    Message 1 of 10 , Aug 21, 2009
      I had Keri reformatting and editing the manual. It came out a lot
      better, but some of it got screwed up in Word version conversions or
      something and needs to be fixed. The content is essentially all the
      same, though.

      Scott

      k7ybz wrote:
      >
      >
      > Of course. My appologies.
      >
      > BTW. Is there a service manual in the works for the T2-301?
      > The FC-301/D service manual is 'preliminary'.
      >
      > Larry
      > K7YBZ
      >
      > --- In tracker2@yahoogroups.com <mailto:tracker2%40yahoogroups.com>,
      > Scott Miller <scott@...> wrote:
      > >
      > > The wiring for the T2-301 is the same as the OT2m if you use the yellow
      > > serial+power cable. You wouldn't be able to run the Garmin cable alone
      > > since it doesn't provide power.
      > >
      > > Scott
      > >
      > > k7ybz wrote:
      > > >
      > > >
      > > > Erich,
      > > >
      > > > I forgot to add that you can have Scott add a DB-9 connector to that
      > > > Garmin cable in the checkout. Just make sure you mention it is for a
      > > > T2-301 as the pinout is different than an OT2.
      > > >
      > > > Larry
      > > > K7YBZ
      > > >
      > > > >
      > > > > Erich,
      > > > >
      > > > > To connect between the Nuvi 350 and the OT2 you need a USB to RS232
      > > > converter. You can make one by using diodes and resistors (look in the
      > > > files section of the tracker2 group) or you can buy the Garmin version
      > > > from Scott. The Garmin part number is 010-10813-00. Here is a link to
      > > > Scott's page:
      > > > >
      > > >
      > https://www.argentdata.com/catalog/product_info.php?cPath=28&products_id=90
      > <https://www.argentdata.com/catalog/product_info.php?cPath=28&products_id=90>
      >
      > > >
      > <https://www.argentdata.com/catalog/product_info.php?cPath=28&products_id=90
      > <https://www.argentdata.com/catalog/product_info.php?cPath=28&products_id=90>>
      > > > >
      > > > > Larry
      > > > > K7YBZ
      > > > >
      > > > >
      > > > > --- In tracker2@yahoogroups.com
      > <mailto:tracker2%40yahoogroups.com> <mailto:tracker2%40yahoogroups.com>,
      > > > "Erich J. Ritzmann" <ejritz@> wrote:
      > > > > >
      > > > > >
      > > > > > You are correct -- with the "powered cable", I was indeed
      > referring to
      > > > > > the yellow cable. And, looks like I overlooked the bit about
      > voltage
      > > > > > differences.
      > > > > >
      > > > > > A pair of (series?) diodes & (series?) resistor, designed to
      > drop the
      > > > > > voltage from the output of the T2-301 from 5 to 3.3vdc.
      > > > > >
      > > > > > But going the other direction, would 3.3v be enough to be
      > readable by
      > > > > > the T2?
      > > > > >
      > > > > > The only cable that came with the Nuvi looks like a normal USB
      > with a
      > > > > > normal connector on one end and a USB-b "mini" on the other --
      > is that
      > > > > > the one you are referring to? I can certainly cannibalize that.
      > > > > >
      > > > > > --
      > > > > > ER
      > > > > >
      > > > > > On 20-Aug-09, at 12:44 AM, Scott Miller wrote:
      > > > > >
      > > > > > > Ok, back up for a minute. What cables are you using? Are you
      > > > > > > connecting directly to the T2-301, or are you using the
      > yellow and
      > > > > > > black
      > > > > > > cable?
      > > > > > >
      > > > > > > The nuvi needs 3.3v levels. If you're connecting it to a T2
      > of any
      > > > > > > type, you need to either use the Garmin cable with the level
      > shifter
      > > > > > > built in, or use a couple of diodes and a resistor to limit the
      > > > output
      > > > > > > level.
      > > > > > >
      > > > > > > Scott
      > > > > > >
      > > > > > > va3xto wrote:
      > > > > > >>
      > > > > > >>
      > > > > > >> I wired up a T2-301 with a powered cable using two USB-b
      > connectors.
      > > > > > >>
      > > > > > >> Serial pins 4&5 supply power to pins 1 &5 of USB-b-B (5 vdc
      > power
      > > > > > >> on back)
      > > > > > >>
      > > > > > >> Serial pin 2 connects to pin 3 on USB-b-A (FMI on side).
      > > > > > >> Serial pin 3 connects to pin 2 on USB-b-A (FMI).
      > > > > > >>
      > > > > > >> 8.06k measured resistance between ground and USB-b-A pin 4
      > brown.
      > > > > > >>
      > > > > > >> The Nuvi gets power from the back, no problem. Disconnecting
      > back
      > > > > > >> yields
      > > > > > >> serial device must have power, yada, yada.
      > > > > > >>
      > > > > > >> The GPS is working based on the map it displays on the Nuvi
      > itself.
      > > > > > >>
      > > > > > >> The T2-301 doesn't seem to send any data using the Nuvi. (And,
      > > > > > >> transmitting packets nearby from another machine does not
      > > > display the
      > > > > > >> expected waypoint.)
      > > > > > >>
      > > > > > >> Before plugging in the Nuvi, I had the T2-301 transmitting APRS
      > > > > > >> packets
      > > > > > >> using the ADS-GM1 GPS.
      > > > > > >>
      > > > > > >> Any ideas what I am missing?
      > > > > > >>
      > > > > > >>
      > > > > > >
      > > > > > >
      > > > > > >
      > > > > > > ------------------------------------
      > > > > > >
      > > > > > > Yahoo! Groups Links
      > > > > > >
      > > > > > >
      > > > > > >
      > > > > > --
      > > > > > Erich J. Ritzmann
      > > > > >
      > > > >
      > > >
      > > >
      > >
      >
      >
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