#Lab25_Sensor_DHT22.py

from machine import Pin
import time
from dht import DHT11, DHT22

dht22 = DHT22(Pin(23))
led_red = Pin(2,Pin.OUT)
led_yellow = Pin(4,Pin.OUT)
led_green = Pin(5,Pin.OUT)

led_red.value(0)
led_yellow.value(0)
led_green.value(0)

while True:
    try:
        time.sleep(0.5)
        dht22.measure()
        temperature_C = dht22.temperature()
        temperature_C = round(temperature_C, 2)

        humidity = dht22.humidity()
        humidity = round(humidity, 2)
        
        print("Temperature: ", temperature_C, 'C')
        print("Humidity: ", humidity, "%")
        time.sleep(2)

        if temperature_C > 45:
            led_red.on()
            led_yellow.off()
            led_green.off()
        elif temperature_C > 35:
            led_red.off()
            led_yellow.on()
            led_green.off()
        else:
            led_red.off()
            led_yellow.off()
            led_green.on()


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