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

Measuring three axis acceleration with a digital accelerometer


The upm library includes support for the three axis digital accelerometer breakout board ADXL345 in the pyupm_adxl345 module. The Adxl345 class declared in this module represents a three axis digital accelerometer based on the ADXL345 sensor, connected to our board. The class makes it easy to initialize the sensor, update and retrieve the acceleration values for the three axis through the I2C bus. The class works with the mraa.I2C class under the hoods to talk with the sensor, that is, to write data to and read data from the ADXL345 sensor that acts as a slave device connected to the I2C bus.

Tip

Unluckily, each module in the upm library doesn't follow the same naming conventions we should expect for Python code. For example, in our previous example, that class name was ADXL335, with capital letters, while in this example the class name is Adxl345.

We will create a new version of the Accelerometer class to represent the accelerometer...