import time
from machine import Pin, ADC, PWM


trig = Pin(0, Pin.OUT)
echo = Pin(1, Pin.IN)

def action():
    trig.low()
    time.sleep_us(2)
    trig.high()
    time.sleep_us(10)
    trig.low()
    time_off = 0
    while echo.value()==0:
        time_off = time.ticks_us()
    while echo.value()==1:
        time_on = time.ticks_us()
    return ((time_on-time_off)*0.0343)/2
while True:
    distance = action()
    print(distance)
    time.sleep(1)