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Practical Python Programming for IoT

You're reading from   Practical Python Programming for IoT Build advanced IoT projects using a Raspberry Pi 4, MQTT, RESTful APIs, WebSockets, and Python 3

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Product type Paperback
Published in Nov 2020
Publisher Packt
ISBN-13 9781838982461
Length 516 pages
Edition 1st Edition
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Author (1):
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Gary Smart Gary Smart
Author Profile Icon Gary Smart
Gary Smart
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Table of Contents (20) Chapters Close

Preface 1. Section 1: Programming with Python and the Raspberry Pi
2. Setting Up your Development Environment FREE CHAPTER 3. Getting Started with Python and IoT 4. Networking with RESTful APIs and Web Sockets Using Flask 5. Networking with MQTT, Python, and the Mosquitto MQTT Broker 6. Section 2: Practical Electronics for Interacting with the Physical World
7. Connecting Your Raspberry Pi to the Physical World 8. Electronics 101 for the Software Engineer 9. Section 3: IoT Playground - Practical Examples to Interact with the Physical World
10. Turning Things On and Off 11. Lights, Indicators, and Displaying Information 12. Measuring Temperature, Humidity, and Light Levels 13. Movement with Servos, Motors, and Steppers 14. Measuring Distance and Detecting Movement 15. Advanced IoT Programming Concepts - Threads, AsyncIO, and Event Loops 16. IoT Visualization and Automation Platforms 17. Tying It All Together - An IoT Christmas Tree 18. Assessments 19. Other Books You May Enjoy

Exploring the event-loop approach

We will start our code exploration by discussing an event-loop-based approach to building the sample gizmo that we just tested in the previous section.

The code for the event-loop-based approach can be found in the chapter12/version1_eventloop folder. You will find one file named main.py. Please take the time now to stop and read through the code contained in main.py to get a basic understanding of how the program is structured and how it works. Alternatively, you could add breakpoints or insert print() statements into the code and run it again to understand how it works.

How did it go, and what did you notice? If you thought yuck or got lost in the web of loops, if statements, and state variables, then well done! This means you have invested the time to consider this approach and how the code is constructed.

What I mean by an event-loop approach is demonstrated in the code by the while True: loop abbreviated on line 1:

# chapter12/version1_eventloop...
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