from machine import Pin, PWM, ADC
import utime
import math

Buzzer = PWM(Pin(6))
thermistor_pin = Pin(26)
adc = ADC(thermistor_pin)
led = Pin(5, Pin.OUT)
def read_temperature():
    beta = 3950
    series_resistor = 10000
    adc_value = adc.read_u16()
    resistance = series_resistor / (65535 / adc_value - 1)
    
    # using Steinhart-Hart equation we can get the desired values from NTC(Temperature Sensor)
    steinhart = resistance / 10000  # (R/Ro)
    steinhart = math.log(steinhart)  # ln(R/Ro)
    steinhart /= beta  # 1/B * ln(R/Ro)
    steinhart += 1.0 / (25 + 273.15)  # + (1/To)
    steinhart = 1.0 / steinhart  # Invert
    steinhart -= 273.15  # convert to C
    return steinhart

while True:
    temperature = read_temperature()
    print("Temperature:", temperature, "°C")
    
    if temperature > 45:
        led.on()
        # Activate buzzer for a short duration
        Buzzer.duty_u16(3000)
        Buzzer.freq(3000) # SET FREQUENCY as per your Choice
        utime.sleep(0.001)
        Buzzer.duty_u16(0)
        utime.sleep(temperature / 1000)
    utime.sleep(1)