Learning AWS IoT

How to work with the program?

Now we will review our program, comp-demo.js. The following is a list of steps for the program:

1. Firstly, we apply the required library from AWS IoT SDK for JavaScript. Then, we declare our device based on our IoT thing from AWS IoT:

var awsIot = require('aws-iot-device-sdk');var device = awsIot.device({    keyPath: 'cert/macos-computer.private.key',   certPath: 'cert/macos-computer.cert.pem',     caPath: 'cert/root-CA.crt',       host: 'xxxxxxx.iot.ap-southeast-1.amazonaws.com',   clientId: 'user-testing',     region: 'ap-southeast-' });

2. We try to connect to AWS IoT. After we are connected, we subscribe a specific topic, for instance, topic_1. Then, we send a message by calling the publish() function:

device .on('connect', function() ...