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Internet of Things with Python

You're reading from   Internet of Things with Python Create exciting IoT solutions

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Product type Paperback
Published in May 2016
Publisher Packt
ISBN-13 9781785881381
Length 388 pages
Edition 1st Edition
Languages
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Author (1):
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Gaston C. Hillar Gaston C. Hillar
Author Profile Icon Gaston C. Hillar
Gaston C. Hillar
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Table of Contents (13) Chapters Close

Preface 1. Understanding and Setting up the Base IoT Hardware FREE CHAPTER 2. Working with Python on Intel Galileo Gen 2 3. Interacting with Digital Outputs with Python 4. Working with a RESTful API and Pulse Width Modulation 5. Working with Digital Inputs, Polling and Interrupts 6. Working with Analog Inputs and Local Storage 7. Retrieving Data from the Real World with Sensors 8. Displaying Information and Performing Actions 9. Working with the Cloud 10. Analyzing Huge Amounts of Data with Cloud-based IoT Analytics A. Exercise Answers Index

Chapter 5. Working with Digital Inputs, Polling and Interrupts

In this chapter, we will use digital inputs to make it possible for users to interact with the board while we process the HTTP requests. We will:

  • Understand the difference between pull-up and pull-down resistors to connect pushbuttons
  • Wire digital input pins with pushbuttons
  • Use polling to check the pushbutton status with the mraa and wiring-x86 libraries
  • Combine polling to read digital inputs while running a RESTful API
  • Write code that maintains consistency when we provide shared features with electronic components and APIs
  • Use interrupts and the mraa library to detect pressed pushbuttons
  • Understand the differences, advantages, and trade-offs between polling and interrupts to detect changes in digital inputs
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