from machine import Pin, time_pulse_us
import time

vitesse_son = 340
TRIG_PULSE_US = 10

trig = Pin(27, Pin.OUT)
echo = Pin(28, Pin.IN)

while True:

  trig.value(0)
  time.sleep_us(5)

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

  ultrason = time_pulse_us(echo,1,30000)
  distance_cm = vitesse_son * ultrason / 20000

  print(f"Distance : {distance_cm} cm")
  time.sleep_ms(500)