GPIO Zero with CamJam Edu Kit 1

Physical computing Raspberry Pi workshop using the CamJam Edu Kit 1 with Python and GPIO Zero. Workshop given at the Raspberry Pi Birthday Party.

Transcript

1. GPIO Zero with CamJam Edu Kit 1 Introducing the GPIO Zero library with simple components from the CamJam Edu Kit
3. Boot the Pi and open Python 3
4. Open a new file • File > New File • File > Save • Save as camjam.py
5. GPIO Button from gpiozero import Button button = Button(21) while True: print(button.is_pressed) Save and run: Ctrl + S F5
6. GPIO Button from gpiozero import Button button = Button(21) while True: if button.is_pressed: print("Hello") else: print("Goodbye")
7. GPIO Zero Button from gpiozero import Button button = Button(21) while True: button.wait_for_press() print("Pressed") button.wait_for_release() print("Released")
8. GPIO Zero Button + LED from gpiozero import Button, LED button = Button(21) led = LED(25) while True: button.wait_for_press() led.on() button.wait_for_release() led.off()
9. GPIO Zero Button + LED from gpiozero import Button, LED button = Button(21) led = LED(25) while True: button.wait_for_press() led.off() button.wait_for_release() led.on()
10. GPIO Zero Button + LED from gpiozero import Button, LED button = Button(21) led = LED(25) while True: led.blink() button.wait_for_press() led.off() button.wait_for_release()
11. Traffic Lights from gpiozero import Button, TrafficLights button = Button(21) lights = TrafficLights(25, 8, 7) while True: button.wait_for_press() lights.on() button.wait_for_release() lights.off()
12. Traffic Lights from gpiozero import Button, TrafficLights button = Button(21) lights = TrafficLights(25, 8, 7) while True: lights.blink() button.wait_for_press() lights.on() button.wait_for_release()
13. Traffic Lights from gpiozero import Button, TrafficLights, Buzzer from time import sleep button = Button(21) lights = TrafficLights(25, 8, 7) buzzer = Buzzer(15) while True: button.wait_for_press() lights.off() buzzer.on() button.wait_for_release() lights.on() buzzer.off()
14. Traffic Lights while True: lights.green.on() sleep(1) lights.amber.on() sleep(1) lights.red.on() sleep(1) lights.off()
15. Traffic Lights while True: button.wait_for_press() lights.green.on() sleep(1) lights.amber.on() sleep(1) lights.red.on() sleep(1) lights.off()
16. Traffic Lights Sequence • Can you make a full traffic lights sequence? • Use the button for a pedestrian crossing • Use buzzer.beep() to indicate safe crossing
17. Documentation and help guides • gpiozero.readthedocs.org • raspberrypi.org/resources • raspberrypi.org/education/downloads
18. GPIO Zero with CamJam Edu Kit 1 Introducing the GPIO Zero library with simple components from the CamJam Edu Kit