from machine import Pin
import dht
import time

sensor = dht.DHT22(Pin(16))
red = Pin(15, Pin.OUT)
yellow = Pin(14, Pin.OUT)
green = Pin(13, Pin.OUT)

while True:
    try:
        sensor.measure()
        temp = sensor.temperature()
        hum = sensor.humidity()
        
        t = time.localtime()
        ts = f'{t[3]:02d}:{t[4]:02d}:{t[5]:02d}'
        print(f'[{ts}] Temp: {temp:.1f}C | Hum: {hum:.1f}%', end="")
        
        if temp > 30:
            red.value(1); yellow.value(0); green.value(0)
            print('  >> CẢNH BÁO: NHIỆT ĐỘ CAO!')
        elif hum > 80:
            red.value(0); yellow.value(1); green.value(0)
            print('  >> CẢNH BÁO: ĐỘ ẨM CAO!')
        else:
            red.value(0); yellow.value(0); green.value(1)
            print('  Bình thường.')

    except Exception as e:
        print(f'\nLoi: {e}')
    
    time.sleep(2)