Enterprise Internet of Things Handbook

Developing the Node.js device app

Now, we will set up the app and write the required code:

1. From the Terminal, once you are inside the Google-IoT-Device folder, run the following command:

$ npm init -y  

2. Next, we will install jsonwebtoken (https://www.npmjs.com/package/jsonwebtoken) and mqtt (https://www.npmjs.com/package/mqtt) from npm. Execute the following command:

$ npm install jsonwebtoken mqtt--save  

3. Next, we will install rpi-dht-sensor (https://www.npmjs.com/package/rpi-dht-sensor) from npm. This module will help in reading the DHT11 temperature and humidity values:

$ npm install rpi-dht-sensor --save  

4. Your final package.json file should look similar to the following code snippet:

{ "name": "Google-IoT-Device", "version": "1.0.0", ...