from machine import Pin,time_pulse_us
from time import sleep

trig = Pin(15,Pin.OUT)
echo =Pin(14,Pin.IN)

def set_distance():
    trig.low()
    sleep(0.002)
    trig.high()
    sleep(0.000001)
    trig.low()

    duration = time_pulse_us(echo,1)
    distance = (duration*0.0343)/2
    return distance


while True:
    cm = set_distance()
    print("Distance:{}cm".format(cm))
    sleep(1)