Book Image

Mastering Arduino

By : Jon Hoffman
Book Image

Mastering Arduino

By: Jon Hoffman

Overview of this book

Mastering Arduino is an all-in-one guide to getting the most out of your Arduino. This practical, no-nonsense guide teaches you all of the electronics and programming skills that you need to create advanced Arduino projects. This book is packed full of real-world projects for you to practice on, bringing all of the knowledge in the book together and giving you the skills to build your own robot from the examples in this book. The final two chapters discuss wireless technologies and how they can be used in your projects. The book begins with the basics of electronics, making sure that you understand components, circuits, and prototyping before moving on. It then performs the same function for code, getting you into the Arduino IDE and showing you how to connect the Arduino to a computer and run simple projects on your Arduino. Once the basics are out of the way, the next 10 chapters of the book focus on small projects centered around particular components, such as LCD displays, stepper motors, or voice synthesizers. Each of these chapters will get you familiar with the technology involved, how to build with it, how to program it, and how it can be used in your own projects.
Table of Contents (23 chapters)

Code

We will begin the code with three macros that define the pins that the three sensors are connected to. The macros will look like this:

#define COLLISION_SWITCH 4
#define IR_SENSOR 3
#define RANGE_SENSOR A1

These macros show that the crash sensor is connected to digital pin 4, the infrared sensor is connected to digital pin 3 and the ultrasonic rangefinder is connected to analog pin 1. Now we need to set the mode for the two digital pins that we are using and also initiate the serial monitor. We can do this by adding the following code to the setup() function:

Serial.begin(9600);
pinMode(COLLISION_SWITCH, INPUT);
pinMode(IR_SENSOR, INPUT); 

This starts off by initiating the serial monitor and then configures the crash and infrared sensor pins to input so we can read the values. Now we need to add the code to the loop() function that will read the sensors. Let's start...