from machine import Pin, time_pulse_us
import time

trig=Pin(18,Pin.OUT)
echo=Pin(17,Pin.IN)
LD1=Pin(2,Pin.OUT)

while True:

    trig.value(1)
    time.sleep_us(10)
    trig.value(0)

    tiempo=time_pulse_us(echo,1,30000)

    distancia=tiempo/58

    if distancia <130:
        LD1.value(1)

    else:
        LD1.value(0)

time.sleep(0.2)