import machine
import utime

# Initialize I2C display
from machine import I2C, Pin
import ssd1306

i2c = I2C(0, sda=Pin(0), scl=Pin(1), freq=400000)
oled = ssd1306.SSD1306_I2C(128, 64, i2c)

# Initialize the temperature sensor
temp_sensor = machine.ADC(4)

# Initialize the fan control pin
fan_pin = machine.Pin(2, machine.Pin.OUT)

while True:
    # Read temperature from the integrated sensor (or DS18B20)
    temperature = temp_sensor.read_u16() * 3.3 / 65535

    # Convert the temperature to degrees Celsius
    temperature = (temperature - 0.5) * 100

    # Display temperature on the OLED display
    oled.fill(0)
    oled.text("Temperature:", 0, 0)
    oled.text("{:.2f} C".format(temperature), 0, 20)
    oled.show()

    # Check if the temperature is above 30°C and turn on the fan
    if temperature > 30:
        fan_pin.on()
    else:
        fan_pin.off()

    utime.sleep(10)  # Adjust the sleep time as needed