from machine import Pin, time_pulse_us
import time
time.sleep(0.1)  # Wait for USB to become ready
Trig = Pin(2, Pin.OUT)
Echo = Pin(3, Pin.IN)

while True:
    # TRIG EN BAJO
    Trig.value(0)
    time.sleep_us(2)
    # ENVIAR PULSO EN 10 MICROSEGUNDOS
    Trig.value(1)
    time.sleep_us(10)
    Trig.value(0)
    # MEDIR DURACION DE PULSO
    duracion=time_pulse_us(Echo, 1, 30000)  #Time out de 30ms
    distancia=(duracion * 0.0343)/2
    time.sleep(1)
    print("\n Distancia:",distancia, "cm")