from machine import Pin 
from time import sleep
from hcsr04 import HCSR04

sensor = HCSR04(trigger_pin=13, echo_pin=12)
sensor_2 = HCSR04(trigger_pin=35, echo_pin=34)
sensor_3 = HCSR04(trigger_pin=27, echo_pin=26)
sensor_4 = HCSR04(trigger_pin=33, echo_pin=32)
led_rojo = Pin (4 , Pin.OUT)
led_azul = Pin (18 , Pin.OUT)
led_verde = Pin (21 , Pin.OUT)
led_amarillo = Pin (23 , Pin.OUT)
while True:
    try:
        distancia = sensor.distance_cm()
        print("distancia sensor 1 =",distancia)
        if distancia >= 20:
            led_rojo.on()
            led_azul.off()
            print("encendido")
        else:
            led_rojo.off()
            led_azul.off()
            print("apagado")
        sleep(1)
    except:
        print("error")