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import RPi.GPIO as GPIO import time GPIO.setmode(GPIO.BCM) TRIG=21 ECHO=20 while True: print("distance measurement in progress") GPIO.setup(TRIG,GPIO.OUT) GPIO.setup(ECHO,GPIO.IN) GPIO.output(TRIG,False) print("waiting settlement") time.sleep(0.2) GPIO.output(TRIG,True) time.sleep(0.00001) GPIO.output(TRIG,False) while GPIO.input(ECHO)==0: pulse_start=time.time() while GPIO.input(ECHO)==1: pulse_end=time.time() pulse_duration=pulse_end-pulse_start distance=pulse_duration*17150 distance=round(distance,2) print("distance:",distance,"cm") time.sleep(2)
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