Using EnOS Device SDK for MQTT

Table of Contents

• Prerequisites
  • Installing Node
  • Obtaining the SDK
• Feature List
• Quick Start
• Sample Code
• Related Information
• API Reference
• Release Notes

Prerequisites

Installing Node

To use the EnOS Device SDK for NodeJS, you will need to install Node.js 8 or later.

Obtaining the SDK

npm is a command-line package manager that is installed with Node.js is installed, and will be used to obtain the SDK.

$ npm install --save enos-mqtt-sdk-nodejs

Feature List

For the list of features supported by this SDK and the availability of EnOS device connectivity and management features in all SDKs we provide, see EnOS Device SDK.

Quick Start

1. Establishing connection with EnOS Cloud

const {DeviceClient, SECURE_MODE} = require('enos-mqtt-sdk-nodejs');

// create client instance
const clientOptions = {
  brokerUrl: 'brokerUrl',
  secureMode: SECURE_MODE.VIA_DEVICE_SECRET,
  productKey: 'productKey', deviceKey: 'deviceKey', deviceSecret: 'deviceSecret'
}
const client = new DeviceClient(clientOptions);

// listen to 'connect' event
client.on('connect', () => {
  console.log('connected');
})

// listen to 'close' event
client.on('close', () => {
  console.log('connection closed');
})

// establish connection
client.connect().then(async() => {
  // interact with the cloud
});

2. Reporting measurement points

const mpResponse = await client.deviceData.postMeasurepoint({
  point: {
    measurepoints: {
      mp_age: 20
    }
  }
});
console.log(mpResponse.data);

3. Closing the connection

client.close();

Sample Code

• Establishing Connection with EnOS Cloud
• Device Tags
• Device Attributes
• Reporting Measurement Points
• Reporting Events
• Receiving Commands from Cloud
• Passing Through Device Information or Receving Passed-through Information from Cloud
• Managing Sub-devices

Related Information

• To learn more about EnOS IoT Hub, see EnOS IoT Hub Documentation.

API Reference

See api reference

Release Notes

• 2020/01/15 (Initial Release)