rpi simple ultrasonic

rltrasonic

import RPi.GPIO as GPIO
import time

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

TRIG = 4
ECHO = 18


GPIO.setup(TRIG,GPIO.OUT)
GPIO.setup(ECHO,GPIO.IN)



def get_distance():
  GPIO.output(TRIG, True)
  time.sleep(0.00001)
  GPIO.output(TRIG, False)

  while GPIO.input(ECHO) == False:
    start = time.time()

  while GPIO.input(ECHO) == True:
    end = time.time()
    
  signal_time = end-start
  distance = signal_time / 0.000058  
  return distance

while True:
  distance = get_distance()
  time.sleep(1)
  print(distance