from machine import Pin, time_pulse_us
import time

trigger = Pin(5, Pin.OUT)     # TRIG no GPIO5 (D1)
echo = Pin(18, Pin.IN)        # ECHO no GPIO18 (D5)
led = Pin(13, Pin.OUT)        # LED no GPIO13 (D3)

def medir_distancia()://
    trigger.off()
    time.sleep_us(2)
    trigger.on()
    time.sleep_us(10)
    trigger.off()
    
    duracao = time_pulse_us(echo, 1, 30000)
    distancia = (duracao / 2) / 29.1
    return distancia

while True:
    try:
        dist = medir_distancia()
        print("Distância: {:.2f} cm".format(dist))
        
        if dist <= 10:  # LED acende quando distância for 10 cm ou menos
            led.on()
        else:
            led.off()  
        
        time.sleep(0.5)

    except OSError as e:
        print("Erro de medição:", e)
        led.off()
        time.sleep(1)