from machine import Pin, PWM, ADC
import utime, math
import onewire, ds18x20
from time import sleep

# Temperature Sensor ADC Setup
BETA = 3950
adc = ADC(Pin(19))
adc.atten(ADC.ATTN_11DB)

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

def read_ntc_temperature():
    analog_value = adc.read()
    print(analog_value)
    temperature_celsius = 1 / (math.log(1 / (4096 / analog_value - 1)) / BETA + 1.0 / 298.15) - 273.15
    return temperature_celsius

while True:
    temperature = read_ntc_temperature()
    print("Temperature: {:.2f} ℃".format(temperature))
    # pwm
    servo_pin = Pin(5)
    servo_freq = 50
    servo_pwm = 1
    pwm = PWM(servo_pin, freq=servo_freq, duty=servo_pwm) #Defaults to Low Fan Speed
    if temperature > 10 and temperature < 30:
        # Medium Fan Speed
        servo_pwm = 100
        pwm = PWM(servo_pin, freq=servo_freq, duty=servo_pwm)
    elif temperature > 30:
        # High Fan Speed
        servo_pwm = 255
        pwm = PWM(servo_pin, freq=servo_freq, duty=servo_pwm)       
    print(f"DEBUG: Servo PWM: {servo_pwm}")
    Servo(pwm, 180)
    sleep(1)
    Servo(pwm, 0)
    sleep(1)