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Old 20-03-2014, 21:49   #1
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Vessel icon only points north

The vessel icon only pointw north and I cannot get a course prediction vector.

ASUS Vivo Tab Smart

Win 8.1

Geolocation installed.

Position is good. Vessel icon moves, but no COG vector and vessel always points north.

Any suggestions?

Thanks

Jack
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Old 20-03-2014, 22:26   #2
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Re: Vessel icon only points north

Hi Jack,

Did you check to see which NMEA sentences you are receiving from your GPS?

My guess is that you are not getting a heading sentence.

Cheers, ....Erik.
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Old 21-03-2014, 01:28   #3
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Re: Vessel icon only points north

What does the Status Bar (bottom) show for COG (and SOG)?
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Old 21-03-2014, 18:00   #4
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Re: Vessel icon only points north

SOG is good COG is blank.

GEOLCATION shows messages


Sent from my SGH-I747M using Cruisers Sailing Forum mobile app
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Old 21-03-2014, 18:40   #5
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Re: Vessel icon only points north

jackdale...

Please go to options->Connections, tick the "Show NMEA Debug Window" box. "OK" the options dialog.

Collect a few seconds of data in the NMEA debug window, take a screenshot, and post the results.

Thanks
Dave
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Old 22-03-2014, 16:18   #6
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Re: Vessel icon only points north

Quote:
Originally Posted by bdbcat View Post
jackdale...

Please go to options->Connections, tick the "Show NMEA Debug Window" box. "OK" the options dialog.

Collect a few seconds of data in the NMEA debug window, take a screenshot, and post the results.

Thanks
Dave
Here is a screen shot. I am at home now.

Click image for larger version

Name:	<a title=Screen Shot 03-22-14 at 03.08 PM.PNG Views: 79 Size: 23.5 KB ID: 77972" style="margin: 2px" />
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Old 22-03-2014, 16:34   #7
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Re: Vessel icon only points north

Jackdale...

OK, your RMC message is missing SOG and COG. (Fields 7 and 8 below)

Code:
   /*
   ** RMC - Recommended Minimum Navigation Information
   **
   **  Version 2.0 Format
   **                                                            12
   **        1         2 3       4 5        6 7   8   9    10  11|
   **        |         | |       | |        | |   |   |    |   | |
   ** $--RMC,hhmmss.ss,A,llll.ll,a,yyyyy.yy,a,x.x,x.x,xxxx,x.x,a*hh<CR><LF>
   **
   ** Field Number:
   **  1) UTC Time
   **  2) Status, V = Navigation receiver warning
   **  3) Latitude
   **  4) N or S
   **  5) Longitude
   **  6) E or W
   **  7) Speed over ground, knots
   **  8) Track made good, degrees true
   **  9) Date, ddmmyy
   ** 10) Magnetic Variation, degrees
   ** 11) E or W

   ** Version 2.0
   ** 12) Checksum

   ** Version 2.3
   ** 12) Mode (D or A), optional, may be NULL
   ** 13) Checksum
   */
OpenCPN seems to be doing as well as it can with incomplete data.

Did you install a new GPS?
Did something change in your GPS device setup?

Dave
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Old 22-03-2014, 16:53   #8
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Re: Vessel icon only points north

Quote:
Originally Posted by bdbcat View Post
Jackdale...

OK, your RMC message is missing SOG and COG. (Fields 7 and 8 below)


OpenCPN seems to be doing as well as it can with incomplete data.

Did you install a new GPS?
Did something change in your GPS device setup?

Dave
I am using the built in GPS in an Asus Vivo Tab Smart tablet with the Geolocation software. (Windows 8 Tablet with built-in GPS)
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Old 22-03-2014, 18:31   #9
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Re: Vessel icon only points north

jackdale...

I'm not familiar with this tablet. However,....

There should be some configuration options available for the internal GPS, or the geolocation software. We need the driver to produce course and speed as well as lat/lon in the NMEA output received over localhost interface by OpenCPN.

I guess I would explore the Settings on this device.

Dave
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Old 22-03-2014, 18:46   #10
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Re: Vessel icon only points north

jackdale

you could download a trial version (30 days) of 'centrafuse localizer'. If this fixes the problem, then the geolocation sw is suspect.


Centrafuse Inc. - Centrafuse Loclaizer

Dirk
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Old 01-04-2014, 10:46   #11
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Re: Vessel icon only points north

Quote:
Originally Posted by LeaseOnLife View Post
jackdale

you could download a trial version (30 days) of 'centrafuse localizer'. If this fixes the problem, then the geolocation sw is suspect.


Centrafuse Inc. - Centrafuse Loclaizer

Dirk
That worked.
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