Re: GPS and WM5 SirfIII problem

Hi ***,
I'll discard serial port problem for unanimity. I thought that the
problem may be a buffer error or similar that I read somewhere. As I
said us, I'm completely lost now.
I've found 2 programs that works fine with the GPS: SP GPS View and
SirfTech and I suspect that SirfDemo will work too. This programs are
prepared to SirfIII, I think.
Now I'll try to switch on SBAS and test with the "static navigation"
if I found what message to send to the GPS receiver.

Thanks a lot to respond


***, this are the $GPRMC sentences between 3 and 4 satellites. The
speed becomes 0 when the position is "fixed". Sorry for the decimals,
that excel has changed me, but I think that the data are understanding

$GPRMC 80.231.638 A 41.366.999 N 368.998 E 0.66 128.79 100407 A*66
$GPRMC 80.232.638 A 41.366.992 N 369.045 E 0.94 191.88 100407 A*67
$GPRMC 80.233.642 A 41.367.125 N 369.030 E 1.85 61.91 100407 A*5B
$GPRMC 80.234.638 A 41.367.874 N 369.104 E 1.52 154.26 100407 A*6B
$GPRMC 80.235.638 A 41.367.847 N 368.985 E 2.26 157.82 100407 A*67
$GPRMC 80.236.000 A 41.367.850 N 369.001 E 2.61 147.86 100407 A*6D
$GPRMC 80.237.000 A 41.367.898 N 369.057 E 2.88 167.80 100407 A*68
$GPRMC 80.238.000 A 41.367.900 N 369.062 E 1.48 167.86 100407 A*68
$GPRMC 80.239.000 A 41.367.867 N 369.046 E 0.53 96.14 100407 A*50
$GPRMC 80.240.000 A 41.367.843 N 369.040 E 0.00 100407 A*7C
$GPRMC 80.241.000 A
$GPRMC 80.241.000 A 41.367.843 N 369.040 E 0.00 100407 A*7D
$GPRMC 80.242.000 A 41.367.843 N 369.040 E 0.00 100407 A*7E
$GPRMC 80.243.000 A 41.367.843 N 369.040 E 0.00 100407 A*7F
$GPRMC 80.244.000 A 41.367.843 N 369.040 E 0.00 100407 A*78
$GPRMC 80.245.000 A 41.367.843 N 369.040 E 0.00 100407 A*79
$GPRMC 80.246.000 A 41.367.843 N 369.040 E 0.00 100
$GPRMC 80.246.000 A 41.367.843 N 369.040 E 0.00 100407 A*7A
$GPRMC 80.247.000 A 41.367.843 N 369.040 E 0.00 100407 A*7B
$GPRMC 80.248.000 A 41.367.843 N 369.040 E 0.00 100407 A*74
$GPRMC 80.249.000 A 41.367.843 N 369.040 E 0.00 100407 A*75
$GPRMC 80.250.000 A 41.367.843 N 369.040 E 0.00 100407 A*7D


On 11 abr, 21:07, "Dick Grier" <dick_grierNOSPAM@.msn.com> wrote:
Hi,

If you save the NMEA data to a file you can examine it to see if the speed
is changing over the span of time is included.

I agree completely with Mike that if you have data, there is no port
configuration issue. The data cannot be altered by the serial port or by
(any reasonable) software in-line. If there is a problem with the data,
that problem comes from the receiver.

BTW, my SIRFIII receiver doesn't show the problem that you describe.

***

--
Richard Grier, MVP
Hard & Software
Author of Visual Basic Programmer's Guide to Serial Communications, Fourth
Edition,
ISBN 1-890422-28-2 (391 pages, includes CD-ROM). July 2004, Revised March
2006.
Seewww.hardandsoftware.netfor details and contact information.


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