Ex2 - Button

https://gpiozero.readthedocs.io/en/stable/recipes.html#button

任務 1

按下圖連接按扭

另開新檔 button.py。利用以下程式碼，檢查 Button 是否被按下

button.py

from gpiozero import Button

button = Button(5)

while True:
    if button.is_pressed:
        print("Button is pressed")
    else:
        print("Button is not pressed")

任務 2

另開新檔 button_wait.py，以下程式碼，會等待按下 (Wait for press) 按扭後才繼續執行程式

button_wait.py

from gpiozero import Button

button = Button(5)

button.wait_for_press()
print("Button was pressed")

任務 3

另開新檔 ，了解以下程式碼，當每次按下按鈕時，會執行 say_hello。

button_say_hello.py

from gpiozero import Button
from signal import pause

def say_hello():
    print("Hello!")

button = Button(5)

button.when_pressed = say_hello

pause()

任務 4

另開新檔 button_say_goodbye.py。除了在按下按鈕時執行程式，也可以在放開按鈕時執行程式，如 say_goodbye

button_say_goodbye.py

from gpiozero import Button
from signal import pause

def say_hello():
    print("Hello!")

def say_goodbye():
    print("Goodbye!")

button = Button(5)

button.when_pressed = say_hello
button.when_released = say_goodbye

pause()