from machine import Pin, ADC, PWM
import utime as time

# Define pin for NTC sensor and buzzer
ntc_pin = 27  # GPIO pin connected to the NTC sensor (Analog pin)
buzzer_pin = 22  # GPIO pin connected to the buzzer (Digital pin)

# Initialize ADC for reading analog values
adc = ADC(Pin(ntc_pin))

# Initialize buzzer
buzzer = Pin(buzzer_pin, Pin.OUT)

# Initialize PWM for the buzzer
buzzer_pwm = PWM(buzzer)

# Function to read temperature from NTC sensor
def read_temperature():
    # Read analog value from NTC sensor
    analog_value = adc.read_u16()
    # Convert analog value to voltage
    voltage = analog_value * (3.3 / 65535)
    # Convert voltage to temperature (assuming linear relationship)
    # Replace the conversion formula with the appropriate calibration for your NTC sensor
    temperature = (voltage - 0.5) * 100  # Example linear conversion
    return temperature

# Function to play tone
def play_tone(frequency, duration):
    buzzer_pwm.freq(frequency)  # Set frequency
    buzzer_pwm.duty_u16(32768)  # 50% duty cycle (50% volume)
    time.sleep_ms(duration)      # Sound for specified duration
    buzzer_pwm.duty_u16(0)       # Turn off the buzzer

while True:
    # Read temperature from NTC sensor
    temperature = read_temperature()

    # Check if temperature is at or above 69 degrees Celsius
    if temperature >= 69.0:
        print("Temperature is at or above 69 degrees Celsius:", temperature)
        # Sound the buzzer with a tone
        play_tone(1000, 1000)  # Frequency: 1000 Hz, Duration: 1 second
        buzzer.value(1)        # Turn on the buzzer (optional)
        time.sleep(1)          # Sound for 1 second
        buzzer.value(0)        # Turn off the buzzer (optional)
    else:
        print("Temperature:", temperature, "degrees Celsius")

    time.sleep(5)  # Wait for 5 seconds before reading temperature again