const int photoResistorPin = A0; // Photoresistor pin
const int buzzerPin = 9; // Passive buzzer pin
const int buttonPin = 10; // Button pin
const int dt = 200;   // Wait for 200 ms before reading again

int photoValue = 0; // Analog value read from the photoresistor
int frequency = 0; // Tone frequency based on the photoresistor reading
bool soundOn = false; // Flag variable to turn sound on or off

void setup() {
  pinMode(photoResistorPin, INPUT); // Set the photoresistor pin as input
  pinMode(buzzerPin, OUTPUT); // Set the buzzer pin as output
  pinMode(buttonPin, INPUT_PULLUP); // Set the button pin as input with pull-up resistor
  Serial.begin(9600); // Initialize serial communication
}

void loop() {
  // Read the analog value from the photoresistor
  photoValue = analogRead(photoResistorPin);

  // Map the photoresistor reading to a frequency between 200 and 2000 Hz
  frequency = map(photoValue, 0, 1023, 200, 2000);

  // Check if the button is pressed
  if (digitalRead(buttonPin) == LOW) {
    soundOn = !soundOn; // Invert the value of the soundOn flag variable
  }

  // Generate the tone if the soundOn flag variable is true
  if (soundOn) {
    tone(buzzerPin, frequency); // Generate the tone
  } else {
    noTone(buzzerPin); // Stop the tone
  }

  // Print the photoresistor reading and frequency to the serial monitor
  Serial.print("Photoresistor reading: ");
  Serial.print(photoValue);
  Serial.print(", Frequency: ");
  Serial.println(frequency);

  delay(dt); // Wait for 200 ms before reading again
}