Re: ViewSonic with Serial GPS

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From: Kenneth Evans, Jr. (evans_at_aps.anl.gov)
Date: 05/14/04 

Date: Fri, 14 May 2004 18:52:42 -0500

On thinking about your question more, the answer is if you get the Pc-mobile
cables, you don't a need a null modem and gender changer. You only need
them if you use the Garmin serial cable and the PPC serial cable. The
Pc-mobile cables are much less cumbersome IMHO. (Of course, this assumes
you have a PPC that works in the first place with a serial GPS, unlike my
V37.)

    -Ken

"Chris Tacke, eMVP" <ctacke@spamfree-opennetcf.org> wrote in message
news:utRUnO5NEHA.2708@TK2MSFTNGP10.phx.gbl...
> So you've verified that a null-modem adapter isn't required by the
> cable/device?
>
> --
> Chris Tacke, eMVP
> Co-Founder and Advisory Board Member
> www.OpenNETCF.org
> ---
> Windows CE Product Manager
> Applied Data Systems
> www.applieddata.net
>
>
> "Kenneth Evans, Jr." <evans@aps.anl.gov> wrote in message
> news:OIitVI5NEHA.3572@tk2msftngp13.phx.gbl...
> > I have been unable to get my ViewSonic V37 upgraded to PPC 2003 to work
> with
> > a Garmin eTrex connected through the serial port, and would like to know
> if
> > others have had the same experience.
> >
> > It does not work with several GPS programs, including Pocket Streets and
> > GPSInfo, as well as my own program. I have tried the ViewSonic serial
> cable
> > connected to the eTrex serial cable via a null modem and gender changer
as
> > well as another serial cable from Pc-mobile designed for the
> ViewSonic/eTrex
> > combination.
> >
> > All of these programs with the equivalent serial cables work on several
> > versions of iPAQs as they should.
> >
> > It is not the software nor the configuration. It is either my V37, all
> V37s
> > with PPC 2003, or all V37s. Information as to which would be
appreciated.
> >
> > It does sync with ActiveSync using the ViewSonic serial cable. The
eTrex
> > only uses pins 2,3, and 5 (of a 9-pin RS-232). ActiveSync also uses
these
> 3
> > pins (plus some others), but the voltages are different. ViewSonic was
of
> > no help. They said only ActiveSync is supported with the serial cable.
> >
> > The V37 serial port is COM1. Using an RS-232 analyzer I have determined
> > that the data is going out from the software, is received by the eTrex,
> and
> > the proper response is sent back from the eTrex. It just is never
> received
> > by the programs.
> >
> > Any information or experiences would be appreciated.
> >
> > Thanks,
> >
> > -Ken
> >
> >
>
>

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