Book Image

Internet of Things with Raspberry Pi 3

By : Maneesh Rao
Book Image

Internet of Things with Raspberry Pi 3

By: Maneesh Rao

Overview of this book

This book is designed to introduce you to IoT and Raspberry Pi 3. It will help you create interesting projects, such as setting up a weather station and measuring temperature and humidity using sensors; it will also show you how to send sensor data to cloud for visualization in real-time. Then we shift our focus to leveraging IoT for accomplishing complex tasks, such as facial recognition using the Raspberry Pi camera module, AWS Rekognition, and the AWS S3 service. Furthermore, you will master security aspects by building a security surveillance system to protect your premises from intruders using Raspberry Pi, a camera, motion sensors, and AWS Cloud. We'll also create a real-world project by building a Wi-Fi – controlled robot car with Raspberry Pi using a motor driver circuit, DC motor, and a web application. This book is a must-have as it provides a practical overview of IoT’s existing architectures, communication protocols, and security threats at the software and hardware levels—security being the most important aspect of IoT.
Table of Contents (11 chapters)

Bot Building

In this chapter, we have a task cut out to build a Wi-Fi-controlled robotic car. It will not just move forwards and backwards, but will also make left and right turns. Additionally, you will also be able to control the speed of the car using pulse-width modulation (PWM). So, let's build the bot.

We need the following hardware components to build the car:

  • Car chassis (toy car)
  • Two DC motors
  • Four plastic tires (to be fitted with DC motor and car chassis)
  • L293D motor driver IC
  • LEDs (6 to 8 pcs)
  • Battery bank

The following topics are covered in the chapter:

  • Pulse-width modulation
  • Wiring up the bot
  • Executing the commands

Since we have already used DC motor, L293D IC, and LEDs in Chapter 5, Controlling the Pi, we will not go through them in detail again. We will concentrate on building the car structure and programming part.