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

trg = Pin (13, Pin.OUT)
ech = Pin (23, Pin.IN)

def medeDistCm (t, e):
    # dispara o pulso
    t.value(0)
    sleep_us(5)
    t.value(1)
    sleep_us(10)
    t.value(0)
    # aguarda o eco
    tempo = time_pulse_us (e, 1, 1000000)
    print (tempo)
    # calcula a distância em cm
    #d = tempo/2 / 29.4
    d = tempo/58.8

    return d
x = [0,0,0,0,0]
while True:
  for i in range(len(x)):
    x[i] = medeDistCm(trg, ech)

  xmed = sum(x) / len(x)
  #print (x)
  print (xmed)
  sleep_ms(2000)