Book Image

Internet of Things with Python

By : Gaston C. Hillar
Book Image

Internet of Things with Python

By: Gaston C. Hillar

Overview of this book

Internet of Things (IoT) is revolutionizing the way devices/things interact with each other. And when you have IoT with Python on your side, you'll be able to build interactive objects and design them. This book lets you stay at the forefront of cutting-edge research on IoT. We'll open up the possibilities using tools that enable you to interact with the world, such as Intel Galileo Gen 2, sensors, and other hardware. You will learn how to read, write, and convert digital values to generate analog output by programming Pulse Width Modulation (PWM) in Python. You will get familiar with the complex communication system included in the board, so you can interact with any shield, actuator, or sensor. Later on, you will not only see how to work with data received from the sensors, but also perform actions by sending them to a specific shield. You'll be able to connect your IoT device to the entire world, by integrating WiFi, Bluetooth, and Internet settings. With everything ready, you will see how to work in real time on your IoT device using the MQTT protocol in python. By the end of the book, you will be able to develop IoT prototypes with Python, libraries, and tools.
Table of Contents (19 chapters)
Internet of Things with Python
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Preface
Index

Generating analog values via HTTP requests


The HTTP server is running in Yocto Linux and waiting for our HTTP requests to control the LEDs on connected to the Intel Galileo Gen 2 board. Now, we will compose and send HTTP requests from other computer or devices connected to our LAN and we will control the brightness levels for the red, green and blue LEDs.

Open a new terminal, command-line or the GUI tool that we want to use to compose and send HTTP requests from a computer or any device connected to the LAN. Don't forget to replace 192.168.1.107 with your board's IP address in the next requests.

Run the following HTTPie command in a computer or device to use the RESTful API to make the board set the brightness level for the red LED to 30. After you enter the command, you will notice the SSH terminal that displays the output for the Python code will display the following message: Red LED connected to PWM Pin #6 set to brightness 30. In addition, you will see the red LED turned on with a very...