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
   

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3. Boot the Pi and open Python 3
   

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4. Open a new file
   ●
   File > New File
   ●
   File > Save
   ●
   Save as camjam.py
   

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5. GPIO Button
   from gpiozero import Button
   button = Button(21)
   while True:
   print(button.is_pressed)
   Save and run:
   Ctrl + S
   F5
   

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6. GPIO Button
   from gpiozero import Button
   button = Button(21)
   while True:
   if button.is_pressed:
   print("Hello")
   else:
   print("Goodbye")
   

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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")
   

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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()
   

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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()
   

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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()
    

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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()
    

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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()
    

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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()
    

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14. Traffic Lights
    while True:
    lights.green.on()
    sleep(1)
    lights.amber.on()
    sleep(1)
    lights.red.on()
    sleep(1)
    lights.off()
    

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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()
    

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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
    

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17. Documentation and help guides
    ●
    gpiozero.readthedocs.org
    ●
    raspberrypi.org/resources
    ●
    raspberrypi.org/education/downloads
    

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18. GPIO Zero
    with CamJam Edu Kit 1
    Introducing the GPIO Zero library with
    simple components from the CamJam Edu Kit
    

    View Slide