Book Image

Getting Started with Python for the Internet of Things

By : Tim Cox, Steven Lawrence Fernandes, Sai Yamanoor, Srihari Yamanoor, Prof. Diwakar Vaish
Book Image

Getting Started with Python for the Internet of Things

By: Tim Cox, Steven Lawrence Fernandes, Sai Yamanoor, Srihari Yamanoor, Prof. Diwakar Vaish

Overview of this book

This Learning Path takes you on a journey in the world of robotics and teaches you all that you can achieve with Raspberry Pi and Python. It teaches you to harness the power of Python with the Raspberry Pi 3 and the Raspberry Pi zero to build superlative automation systems that can transform your business. You will learn to create text classifiers, predict sentiment in words, and develop applications with the Tkinter library. Things will get more interesting when you build a human face detection and recognition system and a home automation system in Python, where different appliances are controlled using the Raspberry Pi. With such diverse robotics projects, you'll grasp the basics of robotics and its functions, and understand the integration of robotics with the IoT environment. By the end of this Learning Path, you will have covered everything from configuring a robotic controller, to creating a self-driven robotic vehicle using Python. • Raspberry Pi 3 Cookbook for Python Programmers - Third Edition by Tim Cox, Dr. Steven Lawrence Fernandes • Python Programming with Raspberry Pi by Sai Yamanoor, Srihari Yamanoor • Python Robotics Projects by Prof. Diwakar Vaish
Table of Contents (37 chapters)
Title Page
Copyright and Credits
About Packt
Contributors
Preface
Index

A deeper dive into GPIOs


I am sure you remember this line of code from the previous chapter:

GPIO.setup(18,GPIO.OUT)

As explained earlier, this basically tells us how GPIO the pin will behave in a certain program. By now, you must have guessed that by changing this single line of code we can change the behavior of the pin and convert it from output to input. This is how you would do it:

GPIO.setup(18,GPIO.IN)

Once you write this line of code in your program, the microcontroller will know that during the time that the program is being run, the pin number 18 will only be used for input purposes. 

To understand how this would actually work, let's head back to our hardware and see how it can be done. Firstly, you need to connect an LED to any of the pins; we will be using pin number 23 in this program. Secondly, you need to connect a switch on pin number 24. You can refer the diagram that follows for making the connections:

Once you connect it, you can go ahead and write this program:

import time import...