from machine import Pin, time_pulse_us
from time import sleep
import time

TRIG_PIN = 10 
ECHO_PIN = 19

trig = Pin(TRIG_PIN, Pin.OUT)
echo = Pin(ECHO_PIN, Pin.IN)

def measure_distance() :

    
    # envoie d une impultion de 10us sur la broche du trig
    trig.value(1)
    time.sleep_us(3)
    trig.value(0)

    #mesure de a duree de l impultion envoye
    duration = time_pulse_us(echo, 1)

    # calcule de la distance 
    distance = (duration/2)/29.1
    return distance

while True :
    distance = measure_distance()
    print("Distance : ", distance," cm")
    time.sleep(1)