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

dht22_pin = Pin(4)
servo_pin = PWM(Pin(15))

dht22 = DHT22(dht22_pin)

servo_pin.freq(50)

def set_servo_angle(angle):
    duty = int( 2000 + (angle / 180) * 6000 )
    servo_pin.duty_u16( duty )

while True:
    try:
        dht22.measure()
        temp = dht22.temperature()
        print(f'Temperature: {temp}°C')

        if temp > 50:
            print("Fire detected! Opening emergeny exit.")
            set_servo_angle(90)
        else:
            print("Temperature normal. Closing emergency exit.")
            set_servo_angle(0)
    except Exception as e:
        print("Error reading sensor:", e)

    time.sleep(2)