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- #!/usr/bin/env python3
- ########################################################################
- # Filename : Doorbell.py
- # Description : Controlling an buzzer by button.
- # Author : freenove
- # modification: 2018/08/02
- ########################################################################
- import RPi.GPIO as GPIO
- buzzerPin = 11 # define the buzzerPin
- buttonPin = 12 # define the buttonPin
- def setup():
- print ('Program is starting...')
- GPIO.setmode(GPIO.BOARD) # Numbers GPIOs by physical location
- GPIO.setup(buzzerPin, GPIO.OUT) # Set buzzerPin's mode is output
- GPIO.setup(buttonPin, GPIO.IN, pull_up_down=GPIO.PUD_UP) # Set buttonPin's mode is input, and pull up to high level(3.3V)
- def loop():
- while True:
- if GPIO.input(buttonPin)==GPIO.LOW:
- GPIO.output(buzzerPin,GPIO.HIGH)
- print ('buzzer on ...')
- else :
- GPIO.output(buzzerPin,GPIO.LOW)
- print ('buzzer off ...')
- def destroy():
- GPIO.output(buzzerPin, GPIO.LOW) # buzzer off
- GPIO.cleanup() # Release resource
- if __name__ == '__main__': # Program start from here
- setup()
- try:
- loop()
- except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.
- destroy()
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