go gps tacho-meter

nmea_gpvtg_practice.go

package main

import (
	"bufio"
	"fmt"
	"os"

	nmea "github.com/adrianmo/go-nmea"
)

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		line := scanner.Text() // Println will add back the final '\n'
		m, err := nmea.Parse(line)
		if err != nil {
			continue
			// log.Println(line, err)
		}

		s := m.GetSentence()
		if "GPVTG" == s.Type {
			// fmt.Printf("%+v\n", s)
			vtg := nmea.NewGPVTG(s)
			fmt.Println(vtg.GroundSpeedKPH)
		}

	}
	if err := scanner.Err(); err != nil {
		fmt.Fprintln(os.Stderr, "reading standard input:", err)
	}
}