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

Building a Multipurpose IoT Controller

Raspberry Pi is great for building powerful server-based applications, configuring it to act as a web server by installing a web server such as Nginx, Apache, Jetty, or lighttpd. A web server can serve a web application to many users concurrently through a network. But unlike other traditional web applications, Raspberry Pi-hosted web applications can be used to interact with the Raspberry Pi itself, and other peripherals attached to it.

The following diagram shows a Raspberry Pi board configured as a web server with two clients connected to it through a router:

Figure 6-1: Simple Raspberry Pi client-server model

A lightweight web application can be used to interact with sensors and actuators attached to the Raspberry Pi. As an example, you could control an LED attached to a GPIO pin or display readings of a sensor attached to the I2C pins of the Raspberry Pi.

In this chapter...