nmea0183-signalk
Advanced tools
NMEA0183 to Signal K (signalk.github.io) Parser.
(I still need to write proper documentation, but this should be sufficient for now)
Single line mode
$ nmea-signalk --line '$GPRMC,085411.000,A,5222.3215,N,00454.5778,E,0.58,251.34,030414,,,A*63'
$
// OUTPUT EXAMPLE:
// {"self":"a34af45a","vessels":{"a34af45a":{"source":{"type":"NMEA0183","label":"signalk/nmea-signalk"},"timestamp":"2014-05-06T15:52:31.990Z","uuid":"a34af45a","navigation":{"courseOverGroundTrue":{"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T08:54:11.000Z","value":251.34},"location":{"latitude":52.372025,"longitude":4.90963,"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T08:54:11.000Z"},"magneticVariaton":{"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T08:54:11.000Z","value":0},"speedOverGround":{"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T08:54:11.000Z","value":0.58}}}},"version":"2.0","timestamp":"2014-05-06T15:52:31.990Z","source":{"type":"NMEA0183","label":"signalk/nmea-signalk"}}
Usage in piped mode
$ tail -n 1000 gps.log | nmea-signalk
$
// OUTPUT EXAMPLE:
// {"self":"a34af45a","vessels":{"a34af45a":{"source":{"type":"NMEA0183","label":"signalk/nmea-signalk"},"timestamp":"2014-05-06T15:51:30.241Z","uuid":"a34af45a","navigation":{"courseOverGroundTrue":{"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T09:14:11.000Z","value":28.17},"location":{"latitude":52.371901666666666,"longitude":4.90974,"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T09:14:11.000Z"},"magneticVariaton":{"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T09:14:11.000Z","value":0},"speedOverGround":{"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T09:14:11.000Z","value":0.18},"gnss":{"source":{"type":"NMEA0183","sentence":"GGA","device":"nmea-signalk"},"timestamp":"2014-06-06T09:14:00.000Z","quality":1,"satellites":8,"antennaAltitude":1,"horizontalDilution":0,"geoidalSeparation":47,"differentialAge":0,"differentialReference":0},"position":{"source":{"type":"NMEA0183","sentence":"GGA","device":"nmea-signalk"},"timestamp":"2014-06-06T09:14:00.000Z","longitude":52.371903333333336,"latitude":4.909741666666667}}}},"version":"2.0","timestamp":"2014-05-06T15:51:30.123Z","source":{"type":"NMEA0183","label":"signalk/nmea-signalk"}}
// [...]
Usage with file input
$ nmea-signalk -f gps.log
$
// OUTPUT EXAMPLE:
// {"self":"a34af45a","vessels":{"a34af45a":{"source":{"type":"NMEA0183","label":"signalk/nmea-signalk"},"timestamp":"2014-05-06T15:51:30.241Z","uuid":"a34af45a","navigation":{"courseOverGroundTrue":{"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T09:14:11.000Z","value":28.17},"location":{"latitude":52.371901666666666,"longitude":4.90974,"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T09:14:11.000Z"},"magneticVariaton":{"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T09:14:11.000Z","value":0},"speedOverGround":{"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T09:14:11.000Z","value":0.18},"gnss":{"source":{"type":"NMEA0183","sentence":"GGA","device":"nmea-signalk"},"timestamp":"2014-06-06T09:14:00.000Z","quality":1,"satellites":8,"antennaAltitude":1,"horizontalDilution":0,"geoidalSeparation":47,"differentialAge":0,"differentialReference":0},"position":{"source":{"type":"NMEA0183","sentence":"GGA","device":"nmea-signalk"},"timestamp":"2014-06-06T09:14:00.000Z","longitude":52.371903333333336,"latitude":4.909741666666667}}}},"version":"2.0","timestamp":"2014-05-06T15:51:30.123Z","source":{"type":"NMEA0183","label":"signalk/nmea-signalk"}}
// [...]
Usage with serial input
$ nmea-signalk --serial /dev/USB0
$
// OUTPUT EXAMPLE:
// {"self":"a34af45a","vessels":{"a34af45a":{"source":{"type":"NMEA0183","label":"signalk/nmea-signalk"},"timestamp":"2014-05-06T15:51:30.241Z","uuid":"a34af45a","navigation":{"courseOverGroundTrue":{"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T09:14:11.000Z","value":28.17},"location":{"latitude":52.371901666666666,"longitude":4.90974,"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T09:14:11.000Z"},"magneticVariaton":{"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T09:14:11.000Z","value":0},"speedOverGround":{"source":{"type":"NMEA0183","sentence":"RMC","device":"nmea-signalk"},"timestamp":"2014-05-03T09:14:11.000Z","value":0.18},"gnss":{"source":{"type":"NMEA0183","sentence":"GGA","device":"nmea-signalk"},"timestamp":"2014-06-06T09:14:00.000Z","quality":1,"satellites":8,"antennaAltitude":1,"horizontalDilution":0,"geoidalSeparation":47,"differentialAge":0,"differentialReference":0},"position":{"source":{"type":"NMEA0183","sentence":"GGA","device":"nmea-signalk"},"timestamp":"2014-06-06T09:14:00.000Z","longitude":52.371903333333336,"latitude":4.909741666666667}}}},"version":"2.0","timestamp":"2014-05-06T15:51:30.123Z","source":{"type":"NMEA0183","label":"signalk/nmea-signalk"}}
// [...]
Usage as module
var Parser = require('nmea0183-signalk').Parser;
var parser = new Parser({
debug: false,
vessel: require('./vessel.json')
});
someinputstream.pipe(parser);
parser.on('sentence', function(signalk, lineno) {
// do something with signalK object
});
Usage with --debug specified
$ tail -n 10000 gps.log | nmea-signalk --debug
$
/*
SENTENCE #5741
{
"self": "a34af45a",
"vessels": {
"a34af45a": {
"source": {
"type": "NMEA0183",
"label": "signalk/nmea-signalk"
},
"timestamp": "2014-05-06T15:49:01.065Z",
"uuid": "a34af45a",
"navigation": {
"gnss": {
"source": {
"type": "NMEA0183",
"sentence": "GGA",
"device": "nmea-signalk"
},
"timestamp": "2014-06-06T09:14:00.000Z",
"quality": 1,
"satellites": 8,
"antennaAltitude": 1,
"horizontalDilution": 0,
"geoidalSeparation": 47,
"differentialAge": 0,
"differentialReference": 0
},
"position": {
"source": {
"type": "NMEA0183",
"sentence": "GGA",
"device": "nmea-signalk"
},
"timestamp": "2014-06-06T09:14:00.000Z",
"longitude": 52.371903333333336,
"latitude": 4.909741666666667
},
"courseOverGroundTrue": {
"source": {
"type": "NMEA0183",
"sentence": "RMC",
"device": "nmea-signalk"
},
"timestamp": "2014-05-03T09:14:11.000Z",
"value": 28.17
},
"location": {
"latitude": 52.371901666666666,
"longitude": 4.90974,
"source": {
"type": "NMEA0183",
"sentence": "RMC",
"device": "nmea-signalk"
},
"timestamp": "2014-05-03T09:14:11.000Z"
},
"magneticVariaton": {
"source": {
"type": "NMEA0183",
"sentence": "RMC",
"device": "nmea-signalk"
},
"timestamp": "2014-05-03T09:14:11.000Z",
"value": 0
},
"speedOverGround": {
"source": {
"type": "NMEA0183",
"sentence": "RMC",
"device": "nmea-signalk"
},
"timestamp": "2014-05-03T09:14:11.000Z",
"value": 0.18
}
}
}
},
"version": "2.0",
"timestamp": "2014-05-06T15:49:00.284Z",
"source": {
"type": "NMEA0183",
"label": "signalk/nmea-signalk"
}
}
*/
Usage from CLI:
a. Supports data piped in from another process (e.g. tail -n 100 | nmea-signalk)
b. Supports file input (with an NMEA0183 sentence on each line)
c. Supports serial input
d. Supports single line input
When using the parser as a CLI program, it will output a JSON encoded Signal K object on each line on stdout.
Used as node.js module
a. Forked mode: fork a parser in another process, and the parser will send parsed Signal K objects using process.send() (available in the parent process using fork.on('message', function(data) {})).
b. require'ed mode: parser is available as a Transform Stream, ready to accept any streamed input.
Notes
a. Parser output (via whatever method) is always a full spec-compatible Signal K JSON object
b. If the parser receives conflicting input (e.g. a new version of a GLL sentence) the conflict is automatically resolved using the timestamps (see SignalK/signalk-merge for more on merging).
Special thanks to @jamesp for his hard work on node-nmea, as his work inspired the codecs in this parser. Even if the codecs look quite different, I wouldn't have come to this point without his work.
FAQs
NMEA0183 to Signal K parser
The npm package nmea0183-signalk receives a total of 1 weekly downloads. As such, nmea0183-signalk popularity was classified as not popular.
We found that nmea0183-signalk demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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