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Old 13-08-2010, 09:25   #1
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Connecting a Blue Next BN-903S GPS Dongle

Hi,
I have Open CPN version 2.1.0 Build 624A and a Blue Next BN-903S GPS. I have installed the drivers for the GPS as the instructions advised, but it still will not move the boat icon when the laptop is moved around.
Can someone please help me out?

Thanks
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Old 13-08-2010, 10:19   #2
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Have you set ToolBox -> GPS -> NMEA Baud Rate to 9600 ??
The default in OpenCPN is 4800, but your GPS uses 9600.

Thomas
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Old 16-08-2010, 03:44   #3
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Yes, I have set the baud rate to 9600, but its still not communicating.

Any other ideas please?

Has anyone else got the same GPS?
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Old 17-08-2010, 21:35   #4
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I've got this GPS and it works pretty awesome. Maybe not the best answer but you might just need a different one that works more "normally".

Amazon.com: GlobalSat BU-353 Waterproof USB GPS Receiver: Electronics

Edit: I've used it on Windows XP and 7, no problems.
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Old 18-08-2010, 00:46   #5
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connecting a GPS to Mac on Open CPN

Hi,
I am new on Open CPN as well as MAC... I need to connect my USB GPS to the Mac, does any one has any experience with this?
thanks
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Old 28-08-2010, 05:14   #6
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Quote:
Originally Posted by Wick Harbour View Post
Yes, I have set the baud rate to 9600, but its still not communicating.
In my understanding NMEA0183 uses 4800 baud 8n1. Looking at the manual of this device from an UK dealer, it is mostly with chinese language pictures. Strange for me also is the Prolific driver for this device. Perhaps you better look for another GPS mouse as "rebel heart" has pointed out?
If GPS is running you should see the data in the window activated with "Show GPS/NMEA data stream window" in the settings of OCPN.
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Old 30-08-2010, 15:50   #7
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There is no requirement in the NMEA 0183 standard in its various versions, to use a specific transmission speed/baud rate. However most NMEA 0183 devices until recently used 4800 baud with 38400 baud used for AIS.

The BN-903S GPS Dongle does however output at 9600 baud.

Back to Wick Harbour's problem - check with Device Manager to see which COM port the GPS device has created under heading "Ports (COM and LPT)".

Try using that COM port @ 9600 baud in OCPN. It has been suggested that changing the COM port speed in Device Manager (to 9600 baud) may help, although not normally needed.
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Old 31-08-2010, 00:58   #8
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richardhula
Simply look here:
NMEA

I guess the NMEA should know best its own standard.
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Old 31-08-2010, 02:50   #9
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Whoops will change my statement to: NMEA 0183 data transmission does not require a specific speed except to match hardware.

e.g. I receive NMEA data at 57600 baud to my PC chartplotter from virtual COM port as there is no speed restriction with such ports.
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Old 21-09-2010, 14:13   #10
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Following is the solution that worked for me..

To solve this problem, I was advised by a UK based expert as follows:

Set the Comm Port to Comm Port 5 in Device Manager,
Leave the Baud rate as it is, (It does not matter)
Under "Tools" in CPN, set the Comm Port to Port 5 and the Baud rate to whatever it was in Device Manager.

Then, take your laptop to some open space BECAUSE, regardless of the data stream reported by other "Find GPS" programs, OpenCPN will ONLY show your position WHEN, and ONLY WHEN, it can receive data from 4 or more satellites.

After re-setting the thing for what must be a hundred times, I took my laptop out to an area where I know my car Sat Nav gets strong signals and Whoopee!!! OpenCPN lit up and followed my boat. Well, actually, it was my car but who cares, It WORKS!!!

At the Hamilton Road Dock in Lowestoft, England, we get lousy TV and Radio signals and although my Navman and Raytheon plotters get instant position fixes, that's likely because their receivers are 45 feet above the deck of my highly modified Jenneau 40 footer, and since I can get OpenCPN to work with my car, I'm convinced that once I get a mile or so out to sea, I'll get the same result.

I hope this helps all the other folks out there who have been struggling with the same problem.

James
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