Book Image

Learn Arduino Prototyping in 10 days

By : Kallol Bosu Roy Choudhuri
Book Image

Learn Arduino Prototyping in 10 days

By: Kallol Bosu Roy Choudhuri

Overview of this book

This book is a quick, 10-day crash course that will help you become well acquainted with the Arduino platform. The primary focus is to empower you to use the Arduino platform by applying basic fundamental principles. You will be able to apply these principles to build almost any type of physical device. The projects you will work through in this book are self-contained micro-controller projects, interfacing with single peripheral devices (such as sensors), building compound devices (multiple devices in a single setup), prototyping standalone devices (powered from independent power sources), working with actuators (such as DC motors), interfacing with an AC-powered device, wireless devices (with Infrared, Radio Frequency and GSM techniques), and finally implementing the Internet of Things (using the ESP8266 series Wi-Fi chip with an IoT cloud platform). The first half of the book focuses on fundamental techniques and building basic types of device, and the final few chapters will show you how to prototype wireless devices. By the end of this book, you will have become acquainted with the fundamental principles in a pragmatic and scientific manner. You will also be confident enough to take up new device prototyping challenges.
Table of Contents (13 chapters)

Digital input and output

In this section, let us look at the commonly used in-built C functions that are used for digital I/O. The following two functions are used for sending a digital signal out via a digital pin. First the digital pin has to be configured in output mode (for sending) in the setup() function:

pinMode(PIN-NUMBER, I/O-MODE) 

Let us say we want to send a digital signal via digital Pin 7, then the following line of code will be used:

pinMode(7, OUTPUT) 

This is how we configure the digital pin in output mode so that it can send digital signals. The next step is to understand how to actually send a digital signal. For sending a digital HIGH signal the following line of code must be used:

digitalWrite(7, HIGH) 

Similarly, for sending a digital LOW signal the following line of code must be used:

digitalWrite(7, LOW) 

Note that some peripheral components might need...