from machine import Pin
import dht
import time

# Khai báo các chân GPIO cho cảm biến DHT11 và LED
dht_pin = Pin(15, Pin.IN, Pin.PULL_UP)  # Chân DHT11
led_red = Pin(16, Pin.OUT)  # LED đỏ
led_yellow = Pin(17, Pin.OUT)  # LED vàng
led_green = Pin(18, Pin.OUT)  # LED xanh

# Khởi tạo cảm biến DHT22
sensor = dht.DHT22(dht_pin)

def flash_led(pin, times=2, delay_time=0.5):
    for _ in range(times):
        pin.on()
        time.sleep(delay_time)
        pin.off()
        time.sleep(delay_time)

while True:
    try:
        sensor.measure()
        temperature = sensor.temperature()
        humidity = sensor.humidity()

        print("Temperature: {}*C   Humidity: {}%".format(temperature, humidity))

        # Task 1: Xử lý nhiệt độ
        if temperature > 25:
            case_temp = 1
        elif temperature < 23:
            case_temp = 2
        else:
            case_temp = 3

        if case_temp == 1:
            led_red.on()
            led_yellow.off()
            led_green.off()
        elif case_temp == 2:
            led_red.off()
            led_yellow.off()
            led_green.on()
        elif case_temp == 3:
            led_red.off()
            led_yellow.on()
            led_green.off()

        # Task 2: Xử lý độ ẩm
        if humidity > 50:
            case_hum = 1
        else:
            case_hum = 2

        if case_hum == 1:
            flash_led(led_red)
        elif case_hum == 2:
            flash_led(led_green)

        time.sleep(2)
        
    except OSError as e:
        print('Failed to read sensor.')