from machine import Pin, ADC
from time import sleep

rele = Pin(15, Pin.OUT)
boton = Pin(14, Pin.IN, Pin.PULL_DOWN)
ldr = ADC(26)
estado = 0
noche = False

for i in range(1000):
    luz = ldr.read_u16()
    if boton.value() == 1:
        estado = not estado
        rele.value(estado)
        while boton.value() == 1:
            sleep(0.1)
    if luz < 30000 and not noche:
        rele.value(1)
        sleep(30)
        rele.value(0)
        noche = True
    elif luz >= 30000:
        noche = False
    sleep(0.1)