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

Automatic Light Switch Using Presence Detection

Now that we have our Raspberry Pi 3 up and running we can start with our first project that uses it. In this chapter, we will be doing presence detection using the integrated Bluetooth chip and show it on a HD44780 16x2 display. As only showing presence will not fill the whole display, we will be adding light intensity detection and environmental temperature. We would also like to add a home automation factor to this setup by adding a relay that can turn on a light. This little project could possibly be placed at a strategic location such as an entry hallway on which we will focus.

We would like to turn on a light switch when we're nearly home when the light in the hallway is quite dim and show the current temperature. This chapter will then cover the basics of using libraries in other projects in the book.

To be able to build this, we will be covering the following...