Release v1.3.0

New features

• Support for sentences with NMEA 4.10 "TAG Blocks" (#59, #78)
  • Ref.: https://gpsd.gitlab.io/gpsd/AIVDM.html#_nmea_tag_blocks

TAG Block struct

type TagBlock struct {
	Time         int64  // TypeUnixTime unix timestamp (unit is likely to be s, but might be ms, YMMV), parameter: -c
	RelativeTime int64  // TypeRelativeTime relative time, parameter: -r
	Destination  string // TypeDestinationID destination identification 15 char max, parameter: -d
	Grouping     string // TypeGrouping sentence grouping, parameter: -g
	LineCount    int64  // TypeLineCount line count, parameter: -n
	Source       string // TypeSourceID source identification 15 char max, parameter: -s
	Text         string // TypeTextString valid character string, parameter -t
}

Ref.: https://github.com/adrianmo/go-nmea/blob/master/tagblock.go#L10

Code example

NMEA 4.10 TAG Block values can be accessed via the message's TagBlock struct:

package main

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

func main() {
	sentence := "\\s:Satelite_1,c:1553390539*62\\!AIVDM,1,1,,A,13M@ah0025QdPDTCOl`K6`nV00Sv,0*52"
	s, err := nmea.Parse(sentence)
	if err != nil {
		log.Fatal(err)
	}
	parsed := s.(nmea.VDMVDO)
	fmt.Printf("TAG Block timestamp: %v\n", time.Unix(parsed.TagBlock.Time, 0))
	fmt.Printf("TAG Block source:    %v\n", parsed.TagBlock.Source)
}

Output (locale/time zone dependent):

$  go run main/main.go
 
TAG Block timestamp: 2019-03-24 14:22:19 +1300 NZDT
TAG Block source:    Satelite_1

Thank you!

@klyve @simeonmiteff @icholy