from machine import Pin, PWM
import time

# HC-SR04
trig = Pin(3, Pin.OUT)
echo = Pin(2, Pin.IN)

# Buzzer
buzzer = PWM(Pin(15))
buzzer.freq(1000)

def bip(duree=0.2):
    buzzer.duty_u16(30000)
    time.sleep(duree)
    buzzer.duty_u16(0)

def distance_cm():
    trig.low()
    time.sleep_us(2)
    trig.high()
    time.sleep_us(10)
    trig.low()

    while echo.value() == 0:
        pass
    start = time.ticks_us()

    while echo.value() == 1:
        pass
    end = time.ticks_us()

    duree = time.ticks_diff(end, start)
    return duree / 58  # conversion en cm

# --- BOUCLE TRITOU ---
while True:
    d = distance_cm()
    print("Distance:", d, "cm")

    if d < 15:
        print("PLAY_BONJOUR")
        bip()

    time.sleep(1)