from machine import Pin
import utime

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

while True:
    trigger.low()
    utime.sleep_us(2)
    trigger.high()
    utime.sleep_us(5)
    trigger.low()

    while echo.value() == 0:
        signaloff = utime.ticks_us()

    while echo.value() == 1:
        signalon = utime.ticks_us()

    timepassed = signalon - signaloff
    distance = (timepassed * 0.0343) / 2
    sensor = int(distance)
    print("Distance:",sensor)
    utime.sleep(1)