from machine import Pin, time_pulse_us
import time

trig_pin = Pin(4, Pin.OUT)
echo_pin = Pin(5, Pin.IN)

while True:
    trig_pin.value(0)
    time.sleep_us(2)
    trig_pin.value(1)
    time.sleep_us (10)
    trig_pin.value(0)


    duration_us = time_pulse_us(echo_pin, 1)

    distance_cm = duration_us / 58.0

    print("Distance:", distance_cm, "cm")


    time.sleep(1)