Book Image

Practical Python Programming for IoT

By : Gary Smart
Book Image

Practical Python Programming for IoT

By: Gary Smart

Overview of this book

The age of connected devices is here, be it fitness bands or smart homes. It's now more important than ever to understand how hardware components interact with the internet to collect and analyze user data. The Internet of Things (IoT), combined with the popular open source language Python, can be used to build powerful and intelligent IoT systems with intuitive interfaces. This book consists of three parts, with the first focusing on the "Internet" component of IoT. You'll get to grips with end-to-end IoT app development to control an LED over the internet, before learning how to build RESTful APIs, WebSocket APIs, and MQTT services in Python. The second part delves into the fundamentals behind electronics and GPIO interfacing. As you progress to the last part, you'll focus on the "Things" aspect of IoT, where you will learn how to connect and control a range of electronic sensors and actuators using Python. You'll also explore a variety of topics, such as motor control, ultrasonic sensors, and temperature measurement. Finally, you'll get up to speed with advanced IoT programming techniques in Python, integrate with IoT visualization and automation platforms, and build a comprehensive IoT project. By the end of this book, you'll be well-versed with IoT development and have the knowledge you need to build sophisticated IoT systems using Python.
Table of Contents (20 chapters)
1
Section 1: Programming with Python and the Raspberry Pi
6
Section 2: Practical Electronics for Interacting with the Physical World
9
Section 3: IoT Playground - Practical Examples to Interact with the Physical World

Exploring the publisher-subscriber alternative

Now that we have seen an approach to creating our program using threads, callbacks, and OOP techniques, let's consider a third approach using a publisher-subscriber model.

The code for the publisher-subscriber approach can be found in the chapter12/version3_pubsub folder. You will find four files – the main program, main.py, and three class definitions: LED.py, BUTTON.py, and POT.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. Then, proceed to review LED.py, BUTTON.pyand POT.py.

What you will have noticed is that the overall program structure (especially the class files) is very similar to the version2 thread/callback example that we covered in the previous heading.

You may also have realized that this approach is very similar in concept to the publisher/subscribing method...