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Currently, the article doesn't explain how raw GPS satellite data is converted into a stream of NMEA 0183 data and how this stream contains information about where on the world this GPS receiver currently is. I think this would be a great addition to this article, as GPS localization is the most important use of NMEA 0183. --Abdull 09:39, 29 March 2007 (UTC)
I found this article extremely confusing - and left more unanswered than said.
(a) It specifies a sentence structure, then gives what appears to be an example - but that example has very little semblance to the specified protocol
(b) I know that there are multiple sentences possible - but there is no mention in the article about which sentences equipment emit, and how they emit them. Is there some 2-way communication where a listener can ask for specific sentences? Or does a talker simply emit as many sentences as it knows how, in regular sequence, and it is up to the listener to find and parse whatever sentences it wants? Gary Turner 22:51, 17 April 2007 (UTC)
(c) Do things that talk NMEA talk all the time? Is that the default behaviour, or do they need to be addressed somehow to talk? Gary Turner 22:51, 17 April 2007 (UTC)
(d) Under vendor extensions - where you say "special messages to the standard NMEA" - do you mean "special messages in addition to the standard NMEA" Gary Turner 22:51, 17 April 2007 (UTC)
(e) It would probably help to provide a link to the specific piece of equipment you mention. Gary Turner 22:51, 17 April 2007 (UTC)
The 'Serial configuration' section has nothing to do with the NMEA 0183 protocol. The values stated are merely default settings. --193.163.1.101 10:56, 30 May 2007 (UTC)
The listed serial communications specification is extremely important - it's the actual, OFFICIAL configuration specified in the NMEA 0183 standard v. 2.01). Any other use of the sentence structure at different baud rates, etc. may be "NMEA-like", but it would not be NMEA 0183 strictly speaking. 155.212.113.117 13:34, 16 July 2007 (UTC)
The article specifies that a NMEA-0183 sentence is terminated with a <CR><LF>.
THIS IS NOT CORRECT!
There is NO <CR> specified in the official document. A NMEA-0183 sentence is terminated by a <LF> ONLY. (In Unix-speak, this would be a Newline, the canonical Unix line terminator.) Software that expects to find a <CR> will be rudely surprised when it attempts to process real NMEA-0183 data. —Preceding unsigned comment added by 67.98.153.113 (talk) 16:23, 25 January 2008 (UTC)
I found this page not too long ago and I thought it might be a useful external link;
I'll leave it up to you folks.
http://aprs.gids.nl/nmea/
--Samahnub (talk) 04:35, 25 June 2008 (UTC)
The article leaves unclear whether there should be a comma between the last field and the asterisk that precedes the checksum. It offers two conflicting examples:
Example 1: $GPAAM,A,A,0.10,N,WPTNME*32
Example 2: GLL,4916.45,N,12311.12,W,225444,A,*1D<CR><LF>
—Ksn (talk) 17:13, 19 June 2009 (UTC)
Obsolete request
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This is a request from May 2010. It's not been resolved for over 10 years, so I close it. --CiaPan (talk) 15:05, 29 August 2021 (UTC) | ||||||||||||||||||||||||||||||||||||||||||||||
Anonymous user 84.19.238.82 added a compound, multi–line 'message' in this edit. Can anyone prove or disprove it is correct, please?! Compared to the rest of the article, as well as the sources in References and External links, it seems absurd.
CiaPan (talk) 21:47, 7 May 2010 (UTC)
Deleted
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Closed. --CiaPan (talk) 15:05, 29 August 2021 (UTC)
The Compatibility section is clearly just a commercial. I suggest that section be deleted. Its like saying "people who use" SPI-BUS, or PCI-bus or any technical standard. NMEA is so simple there is no reason to have this section. -cellurl — Preceding unsigned comment added by Cellurl (talk • contribs) 12:14, 24 March 2011 (UTC)
I've added some C code to clarify how the xor works for checksum generation. By looking at different forums, searching for the answer myself, I found that it was pretty unclear to most how the checksum could be generated. The question was how you could xor a string and not just two intergers. This is clarified now.--Tjringsmose (talk) 13:09, 28 September 2012 (UTC)