#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <ESP32Servo.h>

const int lightSensorPin = 2; // Analog pin connected to the light sensor
const int servoMotorPin = 5;   // PWM pin connected to the servo motor
const int ledPin = 33;         // Digital pin connected to the LED
const int lcdAddress = 0x27;   // I2C address of the LCD display

LiquidCrystal_I2C lcd(lcdAddress, 16, 2); // Define the LCD object
Servo myservo; // Create a servo object

int lightValue;                // Variable to store the light sensor reading
int servoPosition = 0;         // Variable to store the servo motor position
const int brightThreshold = 1000; // Threshold value for brightness (adjustable)
const int servoMin = 0; // Minimum servo position (0 degrees)
const int servoMax = 90; // Maximum servo position (180 degrees)

void setup() {
  // Initialize serial communication
  Serial.begin(9600);

  // Set pin modes
  pinMode(lightSensorPin, INPUT);
  pinMode(servoMotorPin, OUTPUT);
  pinMode(ledPin, OUTPUT);

  // Initialize LCD display
  lcd.init();
  lcd.backlight();

  // Attach servo object to the pin
  myservo.attach(servoMotorPin);

  // Print initial message
  lcd.print("Initializing...");
  delay(1000);
  lcd.clear();
}

void loop() {
  // Read the light sensor value
  lightValue = analogRead(lightSensorPin);

  // Determine brightness status
  bool isBright = lightValue < brightThreshold;

  // Update LCD display
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Light value: ");
  lcd.print(lightValue);
  lcd.setCursor(0, 1);
  lcd.print(isBright ? "Bright" : "Dark");

  // Control servo motor based on brightness
  if (isBright) {
    servoPosition = servoMax; // Turn clockwise
    digitalWrite(ledPin, HIGH); // Turn on LED
  } else {
    servoPosition = servoMin; // Turn anti-clockwise
    digitalWrite(ledPin, LOW); // Turn off LED
  }
  
  // Move the servo motor to the desired position
  myservo.write(servoPosition);

  // Print status to serial monitor
  Serial.print("Light Value: ");
  Serial.print(lightValue);
  Serial.print(", Servo Position: ");
  Serial.println(servoPosition);

  delay(100); // Delay between readings
}