#include <PID_v1_bc.h>

const int ldrPin = A0;   // Analog pin for LDR
const int buzzerPin = 5; // Digital pin for buzzer

double setpoint = 0;    // Desired light intensity value
double input, output;   // Variables for PID controller
PID myPID(&input, &output, &setpoint, 1, 0.1, 0.1, DIRECT);

void setup() {
  Serial.begin(9600);
  pinMode(buzzerPin, OUTPUT);
  myPID.SetMode(AUTOMATIC);
}

void loop() {
  input = analogRead(ldrPin);  // Read LDR value
  setpoint = map(input, 0, 1023, 1023, 0);  // Map LDR value to inverse range for light intensity (adjust as needed)

  myPID.Compute();  // Compute PID control
  analogWrite(buzzerPin, output);  // Set buzzer sound
}