Configure MQTT Client

You should now have a clone of a stub project where we will continue to write code for our MQTT client.

Open index.js. You should see the following content:

// mic-workshops/workshops/03/index.js

const AWSMqtt = require('aws-mqtt-client').default
const API = require('./api.class.js')
const myApi = new API()

// Insert variables
const IOT_ENDPOINT = ''
const AWS_REGION = ''
const USERNAME = ''
const PASSWORD = ''

const main = async () => {
  try {
    await myApi.login({
      username: USERNAME,
      password: PASSWORD
    })

    // Implement me!
  } catch (e) {
    console.error('An error occured:', e)
  }
}

// Invoke our program
main()

Configure

The first step is to find out the IOT_ENDPOINT and the AWS_REGION. These are configurations for our MQTT client, telling it which MQTT broker to use. You need to find the Manifest and extract IotEndpoint and Region from there.

Variable	Value
IOT_ENDPOINT	(from Manifest) IotEndpoint
AWS_REGION	(from Manifest) Region
USERNAME	< your MIC username >
PASSWORD	< your MIC password >

Insert the values into your program:

const IOT_ENDPOINT = 'xxxxxxxxxxxxxx.iot.xx-xxxx-x.amazonaws.com'
const AWS_REGION   = 'xx-xxxx-x'
const USERNAME     = '< your MIC username >'
const PASSWORD     = '< your MIC password >'