from machine import ADC, Pin, PWM
import time

ldr = ADC(Pin(34))
ldr.atten(ADC.ATTN_11DB)

buzzer = PWM(Pin(25))
buzzer.duty(0)

def controlbu(valor):
    if valor > 3000 and valor < 4000:
        buzzer.freq(300)
        buzzer.duty(512)# intensidad de señal (50%)

    elif valor >= 2000 and valor <= 3000:
        buzzer.freq(1000)
        buzzer.duty(512)

    elif valor < 2000:
        buzzer.freq(2000)
        buzzer.duty(512)

    else:
        buzzer.duty(0)

while True:
    valor = ldr.read()
    print("La cantidad de luz es ... ")
    print(valor)
    controlbu(valor)
    time.sleep(0.5)