Getting Started with Raspberry Pi
- 1. Getting Started with Raspberry Pi (RPi) By: Yeo Kheng Meng ([email protected]) https://github.com/yeokm1/getting-started-with-rpi Creative Crew (12 Aug 2016) 1
- 2. About me • Hardware Engineer at Algo Access • My Hardware projects with Arduino and Raspberry Pi 2
- 3. Who is this talk for? • Beginners to the world of hardware • People with Arduino experience 3
- 4. What is a Raspberry Pi (RPi)? • The Raspberry Pi is a series of credit card-sized single- board computers developed in the United Kingdom by the Raspberry Pi Foundationto promote the teaching of basic computer science in schools and developing countries • https://en.wikipedia.org/wiki/Raspberry_Pi 4
- 5. Types of Raspberry Pi Model B+ (2014) 2 Model B (2015) Model A+ (2014) 700Mhz single-core ARMv6 256MB Ram 1 USB port No Ethernet port 700Mhz single-core ARMv6 512MB RAM 4 USB ports Ethernet port 900Mhz quad-core ARMv7 1024MB Ram 4 USB ports Ethernet port 5 3 Model B (2016) 1.2Ghz quad-core ARMv8 1024MB RAM 4 USB ports Ethernet port, Wifi, Bluetooth Zero (2015) 1Ghz single-core ARMv6 512MB RAM 1 USB OTG port Micro-HDMI Compute Module (2014) 700Mhz single-core ARMv6 512MB RAM 4GB onboard flash SODIMM connector Model B (2012) 700Mhz single-core ARMv6 256MB RAM 2 USB ports Ethernet port Obsolete (Do not purchase unless you have special reasons) Special Mention
- 6. Arduino vs Raspberry Pi Specs Arduino Uno Raspberry Pi 3 Model B CPU type Microcontroller Microprocessor Operating System None Linux (usually Raspbian) or Win 10 Speed 16 Mhz 1.2Ghz RAM 2KB 1GB 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 6W 6
- 7. Minimum to get started • Raspberry Pi 3 • HDMI monitor • USB Keyboard • USB Mouse • 2.5 Amp USB Power Adapter • Micro-USB cable • 8GB Micro-SD card • Computer to load initial card image 7
- 8. Step 1: Download SD card image • Download *.img files from • https://www.raspberrypi.org/downloads/ • https://www.raspberrypi.org/downloads/raspbian/ • Beginners should pick Raspbian Jessie 8
- 9. Step 2: Write image to SD card • Windows computer • https://sourceforge.net/projects/win32diskimager/ • Mac and Linux computer • Get drive number of SD card • sudo fdisk –l • Write disk image to drive number N • sudo dd if=path_of_your_image.img of=/dev/rdiskN bs=1m 9
- 10. Step 3: Boot Raspberry Pi from SD card • Might take a few minutes for the first time 10
- 11. Step 4: Initial Configuration • Set locale to Singapore • Set keyboard layout to English (US) • Configure locale and time zone 11
- 12. Step 5: Do a system update • Connect to the Internet • Open the terminal • Look for new system updates • sudo apt-get update • Download and install latest updates • sudo apt-get upgrade • Recommend to reboot after that 12
- 13. Available Applications • Web Browser: Epiphany • Office Applications: Libreoffice • Media Player: VLC • Run: sudo apt-get install vlc 13
- 14. Raspbian default username/password • Username: pi • Password: raspberry 14
- 15. File System Directory layout • /home/pi or “~” • Your “Home” directory • Removable Drives at • /media/pi/…. 15
- 16. Header pins • 26 Digital-only General Purpose Input Output pins • 3.3V logic levels • Arduino uses 5V 16
- 17. Using the GPIO pins • Python programming language • LED • Button 17
- 18. LED and Button Connection 18 Parts • Breadboard • Button • 1x 10K ohm pull-down resistor • Button • 1x 220 ohm resistor
- 19. LED Blinky • Blink LED at 1 second intervals using Python • python led.py 19
- 20. LED and button code 1 • Button press supposed to toggle LED status • python button1.py 20
- 21. LED and button code 2 (Debouncing) • Button press now toggles LED correctly • python button2.py • Observe CPU usage: “ps aux | grep python” or Task Manager 21
- 22. LED and button code 3 • Toggle LED without sucking CPU resources by sleeping a little in the loop • python button3.py • Observe CPU usage: “ps aux | grep python” or Task Manager 22
- 23. Some warnings • RPi does not keep time on poweroff • No onboard battery and Real-Time-Clock (RTC) chip • It can sync time when connected to network • Do not connect current-heavy USB devices • 600mA for all USB ports default. Can increase to 1.2A • In: /boot/config.txt Add: max_usb_current=1 • 2.5A resettable polyfuse • Use powered USB-hub if needed 23
- 24. My internet radio streamer project 24 https://github.com/yeokm1/pi-radio
- 25. Q&A 25