Exploring the abc's of raspberry pi and python(day 2)
- 1. Shahed Mehbub President, Robo Mechatronics Association Bangladesh(RMABD) Day 2
- 2. Setting up the Pi 6. USB TO POWER SOURCE 5. TO MONITOR 4. TO MOUSE 3. TO KEYBOARD 2. WI-FI ADAPTER 1. SD CARD
- 3. Operating Systems for Pi • Raspbian (Jessie, Jessie lite) • Ubuntu (Snappy Ubuntu Core) • Fedora • Debian • Archlinux ARM • Windows 10 IoT Core • Kali Linux • OpenELEC • RetroPIe
- 4. Preparing the SD card with an OS • Step 1: Download bootable disk .iso's (raspbian jessie) • Link:https://www.raspberrypi.org/downloads/raspbian • Step 2: Write iso image to SD card • For Windows/Mac/Linux https://www.balena.io/etcher/
- 5. Let's boot it up!!! • Plug in all the accessories • Plug in the power cable • Pi will start booting automatically (First boot may take a long time) • You may have to face a configure window (If it happens, follow it through)
- 6. Default Credentials for a new user • If you encounter for a username and password: • username: pi • password: raspberry • After login, type 'startx' to go to the Desktop
- 8. Time for making it home! ▶▶ ▶▶
- 9. Wifi Configuration Menu > Preferences > Wifi Configuration OR Click on the network icon on the top panel
- 10. Almoooooost Ready!! Just one more step! :p
- 11. Do a system update (It is important to function all the apps working correctly) • Open up the terminal: • Write--> sudo apt-get update • and--> sudo apt-get upgrade ** Reboot after completing the update process and we are good to go!!! :D
- 13. GPIO on Raspberry Pi • 26 GPIO Header in Model A/B and 40 GPIO Header in Model B • These pins are a physical interface between the Pi and the outside world. • Out of 26, 8 are dedicated IO Lines, 2 are for UART, 4 are for SPI (+1 for Another Chip Select) , and another 2 for the I2C Interface (Total 17 out of 26) • Rest are Supply Rails. • Model B+ has 9 additional GPIO including a extra SPI (Total 17 + 9 = 26 out of 40) • WiringPi : Easy to use C Library for accessing the GPIO Lines via Programming (Arduino Style Programming)
- 14. Let's Do Blinky!!! Making of a LED Blinker using Python ==> What you will need: -> A raspberry pi -> A LED -> A 330Ω resistor to protect the LED -> Jumper wires
- 15. Let's Do Blinky!!! Step 1: Make sure if the LED is okay • Connect the jumper wires as shown • One wire on the short leg of LED (Negative) • Another one attached with the resistor is on the long leg (Positive) LED
- 16. Let's Do Blinky!!! Step 1: Make sure if the LED is okay • Connect the wires as shown • One in the 3.3V pin (Positive wire) • Another one is in GND ** Check if the LED is on! 3.3V (Pin 1) GND Cathode Anode (longer leg)
- 17. Let's Do Blinky!!! 3.3V Ground GPIO (general purpose input output)
- 18. Let's Do Blinky!!! GPIO-4 (Pin 7)
- 19. 5 functions to control GPIO’s • GPIO.setmode() • GPIO.setwarnings() • GPIO.setup() • GPIO.input() • GPIO.output()
- 20. Let's Do Blinky!!! ->Programming the LED import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BCM) LED = 4 GPIO.setup(LED,GPIO.OUT) while True: GPIO.output(LED,True) time.sleep(1) GPIO.output(LED,False) time.sleep(1) import RPi.GPIO libs set LED pin as output toggle light pin signal to low/high to make it blink. set pin type. use BCM, not pin number GPIO 4 pin (Pin 7)
- 21. Congrats!!! You just finished your first Raspberry Pi project!
- 22. Button input - Wiring
- 23. Performing GPIO Input #import RPi.GPIO as GPIO import EmulatorGUI as GPIO import time GPIO.setmode(GPIO.BCM) INPUTPIN= 23 GPIO.setup(INPUTPIN, GPIO.IN, pull_up_down=GPIO.PUD_UP) while True: if(GPIO.input(INPUTPIN) == True): print(‘this’) else: print(‘that’)
- 24. Your Task!! Write a program that pushing a button will turn on an LED
- 25. Solution import EmulatorGUI as GPIO import time GPIO.setmode(GPIO.BCM) INPUTPIN= 23 led = 4 GPIO.setup(INPUTPIN, GPIO.IN, pull_up_down=GPIO.PUD_UP) while True: if(GPIO.input(INPUTPIN) == True): led.on() else: led.off() def led_on(): GPIO.output(led, True) Def led_of(): GPIO.output(led, False)
- 26. Questions???