Book Image

Programming the BeagleBone

By : Yogesh Chavan, Amit Pandurang Karpe
Book Image

Programming the BeagleBone

By: Yogesh Chavan, Amit Pandurang Karpe

Overview of this book

The whole world is moving from desktop computers to smartphones and embedded systems. We are moving towards utilizing Internet of Things (IoT). An exponential rise in the demand for embedded systems and programming in the last few years is driving programmers to use embedded development boards such as Beaglebone. BeagleBone is an ultra-small, cost-effective computer that comes with a powerful hardware. It runs a full-fledged Debian Linux OS and provides numerous electronics solutions. BeagleBone is open source and comes with an Ethernet port, which allows you to deploy IoT projects without any additions to the board. It provides plenty of GPIO, Anlaog pins, and UART, I2C, SPI pins which makes it the right choice to perform electronics projects. This gives you all the benefits of Linux kernel such as multitasking, multiusers, and extensive device driver support. This allows you to do programming in many languages including high-level languages such as JavaScript and Python. This book aims to exploit the hardware and software capabilities of BeagleBone to create real-life electronics and IoT applications quickly. It is divided into two parts. The first part covers JavaScript programs. The second part provides electronics projects and IoT applications in Python. First, you will learn to use BeagleBone as tool to write useful applications on embedded systems. Starting with the basics needed to set up BeagleBone and the Cloud9 IDE, this book covers interfacing with various electronics components via simple programs. The electronics theory related to these components is then explained in depth before you use them in a program. Finally, the book helps you create some real-life IoT applications.
Table of Contents (21 chapters)
Programming the BeagleBone
Credits
About the Author
Acknowledgment
About the Reviewers
www.PacktPub.com
Preface
BeagleBone Capes
Index

A program to display temperature remotely


This is a useful program in real-life and can be part of your home automation. You will be able to get temperature information from BeagleBone to any Internet connected smartphone/computer. We need to create one HTML file and one Python file for this exercise. Let's write an HTML file first. This HTML file is not hard-coded to show temperature value. It will get temperature value at run time. This type of HTML file defines a pattern or model of how a webpage should look at run time. So, they are called templates in Flask. A template HTML file needs to be created inside the directory templates. So, open Cloud9 IDE. Inside the left-side workspace pane, create a new directory called templates under cloud9 directory. Create a new file named temperature.html inside the templates directory. The total path of this newly created file will be /var/lib/cloud9/templates/temperature.html. Write the following code in it and save:

<!DOCTYPE html>
<html...