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

Integrating a Real-Time IoT Dashboard

The Raspberry Pi is great for working with sensor systems and controlling actuators in both indoor and outdoor environments. The data can be gathered from local sensors attached to the Raspberry Pi, or sensors connected to a cloud computing environment. Adafruit IO is a system that makes data useful, and it provides useful features to work with your data, such as real-time graphs and sets of UI controls that can be used to either display data from a feed or produce data for a feed on a specific topic.

In this chapter, you will:

  • Create feeds and a dashboard with Adafruit IO
  • Connect the TMP102 temperature sensor with the Raspberry Pi through an I2C bus
  • Get data from the temperature sensor through the I2C with the Pi4J library
  • Work with the Eclipse Paho Java MQTT client library
  • Publish data to the feed on a specific topic
  • Display data on the Adafruit IO dashboard
  • Subscribe to...