go-nmea

This is a NMEA library for the Go programming language (http://golang.org).

Installing

Using go get

go get github.com/adrianmo/go-nmea

After this command go-nmea is ready to use. Its source will be in:

$GOPATH/src/github.com/adrianmo/go-nmea

Supported sentences

At this moment, this library supports the following sentence types:

• RMC - Recommended Minimum Specific GPS/Transit data
• PMTK - Messages for setting and reading commands for MediaTek gps modules.
• GGA - GPS Positioning System Fix Data
• GSA - GPS DOP and active satellites
• GSV - GPS Satellites in view
• GLL - Geographic Position, Latitude / Longitude and time
• VTG - Track Made Good and Ground Speed
• ZDA - Date & time data
• HDT - Actual vessel heading in degrees True
• GNS - Combined GPS fix for GPS, Glonass, Galileo, and BeiDou
• PGRME - Estimated Position Error (Garmin proprietary sentence)
• THS - Actual vessel heading in degrees True and status
• VDM/VDO - Encapsulated binary payload
• WPL - Waypoint location
• RTE - Route
• VHW - Water Speed and Heading

Example

package main

import (
	"fmt"
	"log"
	"github.com/adrianmo/go-nmea"
)

func main() {
	sentence := "$GPRMC,220516,A,5133.82,N,00042.24,W,173.8,231.8,130694,004.2,W*70"
	s, err := nmea.Parse(sentence)
	if err != nil {
		log.Fatal(err)
	}
	if s.DataType() == nmea.TypeRMC {
		m := s.(nmea.RMC)
		fmt.Printf("Raw sentence: %v\n", m)
		fmt.Printf("Time: %s\n", m.Time)
		fmt.Printf("Validity: %s\n", m.Validity)
		fmt.Printf("Latitude GPS: %s\n", nmea.FormatGPS(m.Latitude))
		fmt.Printf("Latitude DMS: %s\n", nmea.FormatDMS(m.Latitude))
		fmt.Printf("Longitude GPS: %s\n", nmea.FormatGPS(m.Longitude))
		fmt.Printf("Longitude DMS: %s\n", nmea.FormatDMS(m.Longitude))
		fmt.Printf("Speed: %f\n", m.Speed)
		fmt.Printf("Course: %f\n", m.Course)
		fmt.Printf("Date: %s\n", m.Date)
		fmt.Printf("Variation: %f\n", m.Variation)
	}
}

Output:

$ go run main/main.go

Raw sentence: $GPRMC,220516,A,5133.82,N,00042.24,W,173.8,231.8,130694,004.2,W*70
Time: 22:05:16.0000
Validity: A
Latitude GPS: 5133.8200
Latitude DMS: 51° 33' 49.200000"
Longitude GPS: 042.2400
Longitude DMS: 0° 42' 14.400000"
Speed: 173.800000
Course: 231.800000
Date: 13/06/94
Variation: -4.200000

Contributions

Please, feel free to implement support for new sentences, fix bugs, refactor code, etc. and send a pull-request to update the library.