Book Image

Raspberry Pi 3 Projects for Java Programmers

By : Rajdeep Chandra, John Sirach, Pradeeka Seneviratne
Book Image

Raspberry Pi 3 Projects for Java Programmers

By: Rajdeep Chandra, John Sirach, Pradeeka Seneviratne

Overview of this book

Raspberry Pi is a small, low cost and yet very powerful development platform. It is used to interact with attached electronics by the use of it's GPIO pins for multiple use cases, mainly Home Automation and Robotics. Our book is a project-based guide that will show you how to utilize the Raspberry Pi's GPIO with Java and how you can leverage this utilization with your knowledge of Java. You will start with installing and setting up the necessary hardware to create a seamless development platform. You will then straightaway start by building a project that will utilize light for presence detection. Next, you will program the application, capable of handling real time data using MQTT and utilize RPC to publish data to adafruit.io. Further, you will build a wireless robot on top of the zuma chassis with the Raspberry Pi as the main controller. Lastly, you will end the book with advanced projects that will help you to create a multi-purpose IoT controller along with building a security camera that will perform image capture and recognize faces with the help of notifications. By the end of the book, you will be able to build your own real world usable projects not limited to Home Automation, IoT and/or Robotics utilizing logic, user and web interfaces.
Table of Contents (8 chapters)
4
Integrating a Real-Time IoT Dashboard

Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "Let's take a look at the main(String args[]) method."

A block of code is set as follows:

/**
* Run the LCD example.
*/
public final void runExample(){
/// Clear the display
handler.clear();
/// Cursor to home position (0,0)
handler.setHome();
/// Write to the first line.
handler.write("-- RASPI3JAVA --");
/// Create a time format for output
SimpleDateFormat formatter = new SimpleDateFor-
mat("HH:mm:ss");
/// Sets the cursor on the second line at the first posi-
tion.
handler.setCursor(1, 0);
/// Write the current time in the set format.
handler.write("--- " + formatter.format(new Date()) + " ---");
}

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "In the top of the window there are a set of buttons present which when started has the Welcome button selected. On the same level there is a Breadboard button."

Warnings or important notes appear in a box like this.
Tips and tricks appear like this.