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)

Digital read

To read the value of a digital pin in the Arduino programming language, we use the digitalRead() function. This function takes the following syntax:

digitalRead(pin);

The digitalRead() function takes one parameter, which is the number of the digital pin to read, and will return an integer value. The following code shows how we can use the digitalRead() function to read one of the digital pins on the Arduino:

int val = digitalRead(BUTTON_ONE);

With this code, the digitalRead() function will return the value of the pin defined by the BUTTON_ONE constant and put that value into the variable named val. The val variable is defined to be an integer. However, the digitalRead() function will only return a 0 or a 1. We can use the same HIGH and LOW constants that we saw in the Digital write section to see if the pin is either high or low. Using these constants are preferred...