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


trg = Pin (13, Pin.OUT)
ech = Pin (23, Pin.IN)
#https://wokwi.com/projects/427223468524858369

while True:
    trg.value(0)
    sleep_us(5)
    trg.value(1)
    sleep_us(10)
    trg.value(0)
    
    # aguarda o eco
    tempo = time_pulse_us (ech, 1, 24000)
    
    # calcula a distância em cm
    d = tempo/58.8
                
    print (f'Distância: {d}cm')
    sleep_ms(2000)