from machine import Pin, PWM
from dht import DHT22
from utime import sleep

# Configura PWM nos pinos do LED RGB (ânodo comum)
led_red = PWM(Pin(13))
led_green = PWM(Pin(14))
led_blue = PWM(Pin(15))

for led in (led_red, led_green, led_blue):
    led.freq(1000)

# Sensor DHT22 no GP12
sensor = DHT22(Pin(12))

def set_color(r, g, b):
    """
    r, g, b variam de 0.0 a 1.0
    Ânodo comum: 0 = ligado, 1 = desligado
    """
    led_red.duty_u16(int((1 - r) * 65535))
    led_green.duty_u16(int((1 - g) * 65535))
    led_blue.duty_u16(int((1 - b) * 65535))

def temp_to_color(temp):
    if temp <= 20:
        return (0, 0, 1)   # Azul
    elif temp < 25:
        # 20–25°C → Azul -> Verde
        t = (temp - 20) / 5
        return (0, t, 1 - t)
    elif temp < 30:
        # 25–30°C → Verde -> Vermelho (passa por amarelo)
        t = (temp - 25) / 5
        return (t, 1, 0)
    else:
        return (1, 0, 0)   # Vermelho

while True:
    try:
        sensor.measure()
        temp = sensor.temperature()
        umid = sensor.humidity()
    except Exception as e:
        print("Erro leitura DHT:", e)
        temp = None
        umid = None

    if temp is not None:
        print("Temperatura: {}°C".format(temp))
        print("Umidade: {}%".format(umid))

        r, g, b = temp_to_color(temp)
        set_color(r, g, b)
    else:
        set_color(0, 0, 0)  # Apagado

    sleep(1)  # leitura mais rápida pra dar fluidez