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作成: 2021-03-27 更新: 2021-03-29

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以下は，IR を検知したら LED を点灯するプログラム： #!/usr/bin/env python import RPi.GPIO as GPIO TransmitterPin = 18 ReceiverPin = 16 LedPin = 22 def setup(): # Set the GPIO pins as numbering GPIO.setmode(GPIO.BOARD) # Set the ReceiverPin's mode is input, and (Detected→) ON→ LOW GPIO.setup(ReceiverPin, GPIO.IN, pull_up_down=GPIO.PUD_UP) # Set the TransmitterPin's mode is output GPIO.setup(TransmitterPin, GPIO.OUT) # Set the TransmitterPin high(+3.3V) GPIO.output(TransmitterPin, GPIO.HIGH) # Set the LedPin's mode is output GPIO.setup(LedPin, GPIO.OUT) # Set the LedPin low GPIO.output(LedPin, GPIO.LOW) def loop(): while True: if GPIO.input(ReceiverPin) == GPIO.LOW: GPIO.output(LedPin, GPIO.HIGH) else: GPIO.output(LedPin, GPIO.LOW) def destroy(): # Release resource GPIO.cleanup() # The Program will start from here if __name__ == '__main__': setup() try: loop() # When control c is pressed child program destroy() will be executed. except KeyboardInterrupt: destroy() $ vi ky_005_plus_ky_022.py $ chmod +x ky_005_plus_ky_022.py $ ./ky_005_plus_ky_022.py transmitter と receiver の間が離れると，感度が悪くなる。 そんなときは，鏡を使ってテストするとよい。