from machine import Pin, ADC, PWM
import time

# Define pins
light_sensor_pin = ADC(Pin(26))  # Light sensor analog output connected to GP26
buzzer_pin = Pin(16)            # Buzzer connected to GP16
buzzer_pwm = PWM(buzzer_pin)

# Function to read light intensity
def read_light_intensity():
    return light_sensor_pin.read_u16()  # Read ADC value (0-65535)

# Function to activate the buzzer with a tone
def activate_buzzer(frequency, duration):
    buzzer_pwm.freq(int(frequency))  # Convert frequency to integer
    buzzer_pwm.duty_u16(32768)       # Set the duty cycle (50% duty cycle for tone)
    time.sleep(duration)             # Wait for the specified duration
    buzzer_pwm.duty_u16(0)           # Turn off the buzzer
    time.sleep(0.1)                  # Short pause

while True:
    light_intensity = read_light_intensity()
    print("Light Intensity: {}".format(light_intensity))
    
    if light_intensity < 30000:  # If light intensity is below a threshold
        frequency = 1000 + (30000 - light_intensity) * 0.1  # Adjust frequency based on light intensity
        activate_buzzer(frequency, 0.1)  # Activate buzzer with the adjusted frequency
    else:
        buzzer_pwm.duty_u16(0)  # Ensure buzzer is off when light intensity is above the threshold
    
    time.sleep(1)  # Wait 1 second before the next measurement