[raspberrypi]초음파센서와 전등

import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)

TRIG = 23
ECHO = 24
LED = 22
print("초음파 거리 측정기")

GPIO.setup(TRIG, GPIO.OUT)
GPIO.setup(ECHO, GPIO.IN)
GPIO.setup(LED, GPIO.OUT)
GPIO.output(TRIG, False)
GPIO.output(LED, False)
print("초음파 출력 초기화")
time.sleep(2)

try:
    while True:
        GPIO.output(TRIG,True)
        time.sleep(0.00001)        # 10uS의 펄스 발생을 위한 딜레이
        GPIO.output(TRIG, False)
        
        while GPIO.input(ECHO)==0:
            start = time.time()     # Echo핀 상승 시간값 저장
            
        while GPIO.input(ECHO)==1:
            stop = time.time()      # Echo핀 하강 시간값 저장
            
        check_time = stop - start
        distance = check_time * 34300 / 2
        # distance가 10cm 이하이면 LED on 이상이면 off
        if (distance <  10):
            GPIO.output(LED, True)
        else:
            GPIO.output(LED, False)
        print("Distance : %.1f cm" % distance)
        time.sleep(0.4)
        
except KeyboardInterrupt:
    print("거리 측정 완료 ")
    GPIO.cleanup()