Using the AWS IoT SDK with ALPN extensions to connect over MQTTS on port 443

aws-iot-with-alpn.js

const client = require('aws-iot-device-sdk');

// The options object to provision the MQTT client with.
// Update values between chevrons with the appropriate values.
const opts = {
  host: "<aws-iot-endpoint>",
  keyPath: "<path-to-private-key>",
  certPath: "<path-to-device-certificate>",
  caPath: "<path-to-root-ca>",
  // We are specifying that we want to connect on the
  // port 443 of the AWS IoT Core broker.
  port: 443,
  // Enables the `x-amzn-mqtt-ca` protocol on the TLS connection.
  ALPNProtocols: ["x-amzn-mqtt-ca"]  
};

// Initiating the connection.
const mqttClient = client.device(opts);

// Listening for a connection event.
mqttClient.on('connect', () => console.log(`[+] Successfully connected to AWS IoT over the port ${opts.port}!`));

// Listening for an error event.
mqttClient.on('error', (err) => console.error('[!] An error occured during the connection', err));