from time import sleep_us, sleep
from machine import Pin, time_pulse_us

pin_trig = Pin(16, Pin.OUT)
pin_echo = Pin(17, Pin.IN)
sleep(0.1)
while True:
    pin_trig.value(1)
    sleep_us(10)
    pin_trig.value(0)
    tempous = time_pulse_us(pin_echo , 1)
    distanza = (0.0343 * tempous) / 2
    print("distanza: " + str(distanza) + " cm")
    sleep(2)