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 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)
Integrating a Real-Time IoT Dashboard

Putting it all together, our first automation project

It is time to put it all together. As we explained, we want to switch based on presence detection and only when the ambient light reaches a certain level. This is a code-only section. We will be walking through the code and will code some lines ourselves.

If you haven't already, write down or copy the device's Bluetooth address by running the runBluetoothDetectionExample(); one more time as we will be using this address to get a positive detection. When we have the address, we will be writing a couple of lines of code that run all the components we have looked at as a single application. Let's close all open tabs and only open the Main class. Comment the runBluetoothDetectionExample(); method and scroll to the bottom of the class, where we will be adding the following code:

* Runs the application.
* @throws LcdSetupException When...