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Exploring the ABC's of Raspberry Pi with Python
- 1. Shahed Mehbub President, RoboMechatronics Association Bangladesh(RMABD)
- 2. What we aregonna learn today • Introduction to Raspberry Pi • Hardware description • OS instruction • Linux Shell Commands • Python Basics
- 3. What is aRaspberry Pi? • Credit Card sized single board computer • Plugs into a TV or a Monitor • Based on Broadcom chips • Runs a complete version of Linux • Has multiple usb ports for communication • Supports gigabit ethernet lan 10/100 • Can deliver full HD (1080P) video output • Affordable
- 4. Why Raspberry Pi? •Very Low Cost ($25 for Model A & $35 for Model B/B+) • Great tool for Learning Programming, Computers & Concepts of Embedded Linux, etc • Support for All Age Groups (School Children, College Undergraduates, Professional Developers, Programmers) • Supports & runs Free and Open Source Linux OS • Consumes less than 5W of Power • Supports Full HD Video Output (1080p), Multiple USB Ports , etc • Fun to learn & explore. You are limited by your imagination
- 5. Technology used ina Pi Model A Model B+ Model B+
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- 7. Arduino vs RaspberryPi Specs Arduino Uno Raspberry Pi Model B+ CPU type Microcontroller Microprocessor Operating System None Linux (usually Raspbian) Speed 16 Mhz 700 Mhz RAM 2KB 512MB GPU/Display None VideoCore IV GPU Disk 32KB Depends on SD card GPIO pins 14 digital pins (includes 6 analog) 26 digital pins Other connectivity None USB, Ethernet, HDMI, audio Power consumption 0.25W 3.5W
- 8. Minimum things toget started • Raspberry Pi • HDMI/VGA monitor • USB Keyboard • USB Mouse • USB WiFi adapter (If isn't built-in) • 2.0+ Amp USB Power Adapter • Micro-USB cable • 8GB+ Micro-SD card • A Computer to load initial card image
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- 10. A tour toRaspbian • Web Browser: Epiphany • Office Applications: Libreoffice • Media Player: VLC • Run: sudo apt-get install vlc • Programming: • Geany (an IDE) • IDLE, IDLE3 (python IDE) • Sonic Pi • Scratch
- 11. A Little bitof linux • Bash (Linux Shell) • Terminal Commands • Linux File Systems
- 12. Linux Shell • Tointeract with the Operating System or Hardware we need to enter some commands in the “Shell”. • Simply put, the shell is a program that takes your commands from the keyboard and gives them to the operating system to perform.
- 13. Basic Linux Commands •Show directory contents: • (Do this after every command below to see what has changed) • ls or ls -l • Make directory: • mkdir lesson • Change directory: • cd lesson • Create an empty file: • touch myfile • Edit file with nano: • nano myfile • Type something random inside the text editor then press Ctrl+X to save and quit. • View file quickly: • cat myfile • Copy file • cp myfile myfile2 • Remove file: • rm myfile • Move file • mv myfile2 myfile
- 14. More Useful Commands CommandPurpose man Get information about a particular command. Eg: man ls ifconfig Get network information like IP address adduser Create user passwd Change password uname –a, uname -r Show OS information history Shows past commands you ran chmod Change permissions of a file/directory
- 15. File System DirectoryLayout • /home/pi or “~” • Your “Home” directory • Removable Drives at • /media/pi/….
- 16. Programming on RaspberryPi • Raspberry Pi supports several Programming Languages like : Python, C, C++, JAVA, Perl, HTML5, JavaScript, JQuery etc. • Python is supported as the principal or main user programming language. • Extremely powerful and flexible language. • Can also be used to control hardware on the Pi. • Compiled using gcc (GNU Compiler Collection) ** Learning Programming = Practice Writing Programs
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- 18. Time to doPython!
- 19. Why Python! • GeneralPurpose Language • Large Standard Code Library • Can be compiled to Machine Language • Can call C code (ctypes) • Cleaner Coding Style • Lots of libraries Life is short… (Learn Python)
- 20. Python Basics –Where to write Python • IDLE • Spyder • Atom • PyCharm
- 21. Python Basics –What to learn • Print Statements • Indentation • Variables • Comments • Lists, Dictionaries • Conditionals – if, elif • Loops • Iteration and Range • Functions • Exception Handling
- 22. Python Basics –Print Statements print(“Hello World!!!”)
- 23. Python Basics –Indentation
- 24. Python Basics –Variables • Numbers(int, float, long, complex) • Strings • Boolean • List • Tuple • Dictionary
- 25. Python Basics –Comments
- 26. Python Basics –Lists and Dictionaries
- 27. Python Basics –Conditionals
- 28. Python Basics –Loops
- 29. Python Basics –Iteration and Range
- 30. Python Basics –Functions
- 31. Python Basics –Exception Handling
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