ThingWave SenML module for Golang

This is a Golang module for the JSON-based SenML sensor data format. This module is compatible with IPSO Smart Objects, OMA LwM2M, and Eclipse Arrowhead usage.

Introduction

SenML was developed as an XML and JSON based data format for sensor data. Later CBOR was added as well.

Features

Current features include Golang struct and data type that can capture all features in SenML.

Installation

Install using

go get github.com/thingwave/senml-go

Then import with

import (
  "fmt"
  "time"
  "encoding/json"
  senml "github.com/thingwave/senml-go"
)

To, use, create a SenMLMessage as an array of SenMLRecords (example has OMA LwM2M records for temperature of 23.1 degrees and humidity of 42%)

smlMsg := make(senml.SenMLMessage, 0)
var bver int16 = 5
head := senml.SenMLRecord{Bn: "urn:dev:mac:abcd1234:", Bver: &bver, Bt: float64(time.Now().UnixMilli())/1000.0, N: "3303/0/5700", V: 23.1}
hum := senml.SenMLRecord{N: "3304/0/5700", V: 42}
smlMsg = append(smlMsg, head)
smlMsg = append(smlMsg, hum)
jsonData, err := json.Marshal(smlMsg)
if err == nil {
  
  // do something with the message, like send over MQTT, save to file or database, etc.
  fmt.Printf("%s\n", string(jsonData))
}

Future work

Future work includes:

• JSON to Go validation
• SenML data validation
• CBOR support
• XML support

Contact

Contact [email protected] for feature requests and bug reports.