Internet of Things (IoT) –
Architecture, Communication Technology, and Applications
(EED-379)
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Raspberry Pi
Introduction & Programming
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What is Raspberry Pi
The Raspberry Pi is a series of small single-
board computers developed in the United
Kingdom by the Raspberry
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Pi Foundation to
promote the teaching of basic computer
science in schools and in developing
countries.
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Raspberry Pi 3B+ & 4
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Raspberry Pi
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What is Raspberry Pi
• The Raspberry Pi is a credit card sized computer.
• Raspberry Pi can run many operating systems using
Linux
• Raspberry Pi has following interfaces
• USB Syllabus
• HDMI
• Audio out
• GPIO
• LAN
• Serial Camera
• Serial Touch Screen
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What Raspberry Pi is NOT
• The Raspberry Pi not a microcontroller or
microprocessor, it’s a complete computer.
• Raspberry Pi is not name of any IC.
• Raspberry Pi is not the name of any software.
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• Raspberry Pi is not programming language.
• Raspberry Pi is simply a COMPUTER in a very
small size.
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Why Raspberry Pi for IoT
• Embedded Systems are getting very demanding these days
• High processing requires a descent operating systems like
Linux
• Boards running Linux are very costly
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• Learning Computer in very cost-effective way is need of
time
• Development of a very cost-effective learning and
application platform
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Primary Objective for building Raspberry Pi
• Main purpose of building Raspberry Pi was to enable kids across
the globe to learn computer.
• By providing a computer to as low as USD 35, Raspberry Pi is
the cheapest computer in world.
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• To teach programming language to kids.
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Raspberry Pi Versions
• Pi 1 Model B (2012)
• Pi 1 Model A (2013)
• Pi 1 Model B+ (2014)
• Pi 1 Model A+ (2014)
• Pi 2 Model B (2015)
• Pi Zero (2015) There has generally been a Model A and a Model
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of most generations. Model A has been a less
• Pi 3 Model B (2016) expensive variant and tends to have reduced RAM
• Pi Zero W (2017) and fewer ports (such as USB and Ethernet).
• Pi 3 Model B+ (2018)
• Pi 3 Model A+ (2019)
• Pi 4 Model A (2019)
• Pi 4 Model B (2020)
• Pi 400 (2021)
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OS
Raspberry Pi OS (previously called Raspbian) is the official operating system
for all models of the Raspberry Pi.
Third Party Operating System Images
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Pins of Raspberry Pi 3 B+
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Pins of Raspberry Pi 3 B+
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Classification of Raspberry Pi 3 B+ Pins
The pins can be divided into following categories:
1. Power pins: In Raspberry Pi 3B+, there are two pins
for 5V supply, two pins for 3.3 V supply, and eight
ground pins.
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2. GPIO: 28 GPIO pins.
3. Communication protocol pins: pins for UART, I2C,
and SPI communication
-some of the GPIO pins perform dual purpose.
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GPIO Access in Python
To access the GPIO pins, import Rpi.GPIO library in your program
Import Rpi.GPIO as GPIO
If this library is not installed, then install using:
sudo apt-get install rpi.gpio
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