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ContinuousWave: Small Boat Electrical
|Author||Topic: NMEA sentences|
posted 03-09-2007 11:02 AM ET (US)
Does anyone know if GPS NMEA 0183 sentences can be viewed on a computer, without any special software?
posted 03-09-2007 12:03 PM ET (US)
Maybe in DOS?
posted 03-09-2007 01:47 PM ET (US)
I found the answer to my own question @
posted 03-10-2007 12:50 AM ET (US)
The answer was YES, Use a terminal emulation software and look for an ascii stream coming in on a serial port at 4800bps, or 9600bps.
posted 03-13-2007 02:28 PM ET (US)
Connecting the serial data output of a NMEA-2000 device to another serial data input is not particularly difficult to accomplish. It is fairly trivial. Once you have matched the serial data communication parameters, you will be able to see the serial data stream. However, that is just all you will see: a stream of seral data. You will not see "NMEA Sentences."
If you wish to be able to read NMEA sentences you will have to have some sort of intelligent device which is able to receive the serial data stream and analyze it. The device will have to be able to decode the stream into datagrams, then parse the datagrams for their content, and finally convert the content into something understandable by a human. This is not a trivial task.
You don't get to hook up to your serial port and see "Speed Over Ground is 4.6 knots."
posted 03-13-2007 07:34 PM ET (US)
With all due respect to the webmaster, the original question was NMEA-0183 sentences. NMEA-2000 is a completely different interface.
No NMEA-0183 will not appear as "Speed over ground is 4.6kts", in your terminal emulation software but it should provide a readable sentence of data if you get your parameters set correctly. Typically, you will want to have a guide to help you parse out the sentence structure. Just as the meaning of a sentence written in french is not readily apparent to someone who does not read the language, the NMEA-0183 sentence has structure and meaning if you understand the various words used.
The following link provides a synopsis of the NMEA-0183 sentence structure: http://www.windmill.co.uk/monitor52.html
posted 03-13-2007 08:53 PM ET (US)
Yes, er, No. I meant NMEA-0183 sentences. But you still need to have some way to parse the data into a form which makes sense to human.
posted 03-14-2007 10:01 AM ET (US)
Good news all!!
The hyperterminal test indicated that the GPS NMEA sentences were streaming out just fine.
Thanks for all your individual inputs about this matter...
posted 03-14-2007 10:12 PM ET (US)
Give us a sample of the data stream you captured on your terminal program, please.
posted 03-15-2007 12:32 PM ET (US)
Sample sentences are as follows,
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