Book Image

Internet of Things Programming Projects

By : Colin Dow
Book Image

Internet of Things Programming Projects

By: Colin Dow

Overview of this book

The Internet of Things (IOT) has managed to attract the attention of researchers and tech enthusiasts, since it powerfully combines classical networks with instruments and devices. In Internet of Things Programming Projects, we unleash the power of Raspberry Pi and Python to create engaging projects. In the first part of the book, you’ll be introduced to the Raspberry Pi, learn how to set it up, and then jump right into Python programming. Then, you’ll dive into real-world computing by creating a“Hello World” app using flash LEDs. As you make your way through the chapters, you’ll go back to an age when analog needle meters ruled the world of data display. You’ll learn to retrieve weather data from a web service and display it on an analog needle meter, and build a home security system using the Raspberry Pi. The next project has a modern twist, where we employ the Raspberry Pi to send a signal to a web service that will send you a text when someone is at the door. In the final project, you take what you've learned from the previous two projects and create an IoT robot car that you can use to monitor what your pets are up to when you are away. By the end of this book, you will be well versed in almost every possible way to make your IoT projects stand out.
Table of Contents (21 chapters)

Connecting to cloud services using JavaScript

For our project, we will build a JavaScript client and connect it to an MQTT Broker. We will both Publish and Subscribe to a topic named test. We will then write a small simple program on Raspberry Pi to publish to the topic named test. What this code will demonstrate is how easy it is to send and receive messages using MQTT.

Take a look at the following diagram to see what we will accomplish with this project:

Setting up a CloudMQTT account

The first step is to set up an MQTT Broker. We may do this by installing one locally using the Mosquitto platform (www.mosquitto.org). What we will do instead is set up a cloud-based MQTT Broker using the website www.cloudmqtt.com.

To set...