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Python Programming with Raspberry Pi

You're reading from   Python Programming with Raspberry Pi Build small yet powerful robots and automation systems with Raspberry Pi Zero

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Product type Paperback
Published in Apr 2017
Publisher Packt
ISBN-13 9781786467577
Length 312 pages
Edition 1st Edition
Languages
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Authors (2):
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Sai Yamanoor Sai Yamanoor
Author Profile Icon Sai Yamanoor
Sai Yamanoor
Srihari Yamanoor Srihari Yamanoor
Author Profile Icon Srihari Yamanoor
Srihari Yamanoor
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Table of Contents (17) Chapters Close

Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
1. Getting Started with Python and the Raspberry Pi Zero FREE CHAPTER 2. Arithmetic Operations, Loops, and Blinky Lights 3. Conditional Statements, Functions, and Lists 4. Communication Interfaces 5. Data Types and Object-Oriented Programming in Python 6. File I/O and Python Utilities 7. Requests and Web Frameworks 8. Awesome Things You Could Develop Using Python 9. Lets Build a Robot! 10. Home Automation Using the Raspberry Pi Zero 11. Tips and Tricks

Raspberry Pi's GPIO


The Raspberry Pi Zero comes with a 40-pin GPIO header. Out of these 40 pins, we can use 26 pins either to read inputs (from sensors) or control outputs. The other pins are power supply pins (5V, 3.3V, and Ground pins):

Raspberry Pi Zero GPIO mapping (source: https://www.raspberrypi.org/documentation/usage/gpio-plus-and-raspi2/README.md)

We can use up to 26 pins of the Raspberry Pi's GPIO to interface appliances and control them. But, there are certain pins that have an alternative function, which will be discussed in the later chapters.

The earlier image shows the mapping of the Raspberry Pi's GPIO pins. The numbers in the circle correspond to the pin numbers on the Raspberry Pi's processor. For example, GPIO pin 2 (second pin from the left on the bottom row) corresponds to the GPIO pin 2 on the Raspberry Pi's processor and not the physical pin location on the GPIO header.

In the beginning, it might be confusing to try and understand the pin mapping. Keep a GPIO pin handout...

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