GPS Applications

[Country Loon]

I was wondering if anybody had read from a serial port a GPS receiver.In
particular I wondered if they had read NMEA strings?


Tom

[tbob]

I have done this before in a previous job. Unfortunately, I no longer have access to those files or notes. I do remember finding a website that explained the NMEA codes and strings. Perhaps do a search on google for NMEA. You can find the website that explains the strings, and you should be able to find software that runs on a PC that will use the serial port to interface with GPS receivers. All I can remember is that the strings give info about where the satellites that are picked up are located, the signal strengths, timestamps, info about the satellites, and other stuff. Usually the software inside the GPS does the triangulation to find your position depending upon signal strengths and satellite locations. Good luck.

[RajivG]

Hello Tom,

Like TBob said the best option is to try searching on google for NMEA. But just to add some more information:

NMEA output is EIA-422A (RS-232 compatible). To communicate over serial use 4800 bps, 8 data bits, no parity and one stop bit. NMEA sentences are all ASCII and begins with a dollarsign ($) and ends with a carriage return linefeed (). All data is separated by comma and must be included as marker. After the $ is the address field XXYYY, where XX is the device id and YYY is the sentence name.

I hope it provided some useful information.
Rajiv

[chilly_charly]

Hank Walters (Hank.Walters@faa.gov) proposed such a vi, named GARMIN45.VI in 1999.
I have it, but I can't find a way to post it (too large ?)

[Country Loon]

"chilly charly" wrote in message
news:50650000000500000073D50100-1079395200000@exchange.ni.com...
> Hank Walters (Hank.Walters@faa.gov) proposed such a vi, named
> GARMIN45.VI in 1999.
> I have it, but I can't find a way to post it (too large ?)

Here is my email address...

gyansorova at yahoo dot co dot uk

If you could email it I would be grateful.

Thanks

Tom

[alipio]

Hi all
For all of you interested in GPS, the garmin45.vi is available for download in
http://www.info-labview.org/the-archives/vi/lv5/

Hope it helps
Alipio

[alex.]

I tried to understand the parse of GSV as the following drawing, but different from the original one.

Any help, thanks.