print("INTELLIGENT EXHAUST FAN")
print("AJMAL HAZIQ BIN MOHD AZUAN")
print("Date:29/4/2024")

from machine import Pin, PWM, SoftI2C
from utime import sleep
import oled_lib, dht

sensor_pin = dht.DHT22 (Pin(13))
Led_pin = Pin(18, Pin.OUT)
oled_pin = SoftI2C(scl=Pin(22),sda=(21))
motor = PWM(Pin(19), freq=50, duty=0)

disp_oled = oled_lib.SSD1306_I2C(width=128, height=64, i2c=oled_pin)


def Servo(servo, angle):
    motor.duty(int(((angle)/180 *2 + 0.5) / 20 * 1023))    

while True:
    sensor_pin.measure() # read the parameters from the sensor
    t = sensor_pin.temperature()
    sleep(2)

    disp_oled.fill(0)
    disp_oled.text("VENTILATION",4 ,10 ,1)
    disp_oled.text("SYSTEM",4 ,30 ,1)
    disp_oled.show()
    sleep(3)

    if t > 40:
        Led_pin.on()
        Servo(2,180)
        sleep(1)
        Servo(2,0)
        sleep(1)
        disp_oled.fill(0)
        disp_oled.text("FAN OPERATED",4 ,20 ,1)
        disp_oled.show()        
    else:
        Led_pin.off()
        motor.duty(0)
        disp_oled.fill(0)
        disp_oled.text("FAN NOT",4 ,20 ,1)
        disp_oled.text("OPERATED",4 ,40 ,1)
        disp_oled.show()
    
    disp_oled.fill(0)
    disp_oled.text("CAUTION!!!",4 ,10 ,1)
    disp_oled.text("TEMP: {} C".format(t), 4, 30, 1)
    disp_oled.show()


    sleep(1)