node-nmea

Parser for NMEA sentences.

Available sentences:

• GPRMC - recommended minimum data for gps

Example: $GPRMC,161006.425,A,7855.6020,S,13843.8900,E,154.89,84.62,110715,173.1,W,A*30

Where:

Value	Definition
RMC	Recommended Minimum sentence C
161006.425	Fix taken at 16:10:06.425 UTC
A	Status A=active or V=Void.
7855.6020,S	Latitude 78 deg 55.6020' N
13843.8900,E	Longitude 138 deg 43.8900' E
154.89	Speed over the ground in knots
84.62	Track angle in degrees True
110715	Date - 11 of July 2015
173.1,W	Magnetic Variation in degrees (- West Declination, + East Declination)
A	FAA Mode A=autonomous, D=differential, E=estimated (dead-reckoning), M=manual input, S=simulated, N=data not valid, P=precise (4.00 and later)
*30	The checksum data, always begins with *

Installation

$ npm install node-nmea

Use

Try on Tonic

import nmea from "node-nmea"

const raw = '$GPRMC,161006.425,A,7855.6020,S,13843.8900,E,154.89,84.62,110715,173.1,W,A*30'
const data = nmea.parse(raw)
data.valid // true
data.raw // '$GPRMC,161006.425,A,7855.6020,S,13843.8900,E,154.89,84.62,110715,173.1,W,A*30'
data.type // 'RMC'
data.gps // true
data.datetime // Sat Jul 11 2015 13:10:06 GMT-0300 (CLT)
data.loc // { type: 'Point', coordinates: [ 138.7315, -78.9267 ] }
data.speed: { knots: 154.89, kmh: 286.85627999999997 }
data.track // '84.62'
data.magneticVariation // '173.1,W'
data.mode // 'Autonomous'