#include <LiquidCrystal_I2C.h>

// Define LCD properties
#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

#define BUZZER 8  // Use a digital pin for the buzzer (D8)
  
int ldr1 = A0; // Connect LDR1 to analog pin A0
int ldr2 = A1; // Connect LDR2 to analog pin A1
int ldr3 = A2; // Connect LDR3 to analog pin A2

void setup() {
  lcd.init();           // Initialize the LCD
  lcd.backlight();      // Turn on the backlight
  pinMode(ldr1, INPUT);
  pinMode(ldr2, INPUT);
  pinMode(ldr3, INPUT);
  pinMode(BUZZER, OUTPUT);
  Serial.begin(115200); // Initialize serial communication
}

void loop() {
  int data1 = analogRead(ldr1); // Read LDR1 value
  Serial.println("ldr1 value=" + String(data1));

  int data2 = analogRead(ldr2); // Read LDR2 value
  Serial.println("ldr2 value=" + String(data2));

  int data3 = analogRead(ldr3); // Read LDR3 value
  Serial.println("ldr3 value=" + String(data3));

  lcd.clear();
  lcd.setCursor(1, 0);
  lcd.print("Street Light Fault");
  lcd.setCursor(1, 1);
  lcd.print("Detection Project");

  if (data1 > 1000 && data2 > 1000) {
    if (data3 > 1000) {
      Serial.println("All lights are faulty");
      lcd.setCursor(0, 3);
      lcd.print("All Lights are Faulty");
      digitalWrite(BUZZER, HIGH);
    } else {
      Serial.println("Light 1 & 2 Fault");
      lcd.setCursor(2, 3);
      lcd.print("Light 1 & 2 Fault");
      digitalWrite(BUZZER, HIGH);
    }
  } else if (data2 > 1000 && data3 > 1000) {
    if (data1 > 1000) {
      Serial.println("All lights are faulty");
      lcd.setCursor(0, 3);
      lcd.print("All Lights are Faulty");
      digitalWrite(BUZZER, HIGH);
    } else {
      Serial.println("Light 2 & 3 Fault");
      lcd.setCursor(2, 3);
      lcd.print("Light 2 & 3 Fault");
      digitalWrite(BUZZER, HIGH);
    }
  } else if (data3 > 1000 && data1 > 1000) {
    if (data2 > 1000) {
      Serial.println("All lights are faulty");
      lcd.setCursor(0, 3);
      lcd.print("All Lights are Faulty");
      digitalWrite(BUZZER, HIGH);
    } else {
      Serial.println("Light 1 & 3 Fault");
      lcd.setCursor(2, 3);
      lcd.print("Light 1 & 3 Fault");
      digitalWrite(BUZZER, HIGH);
    }
  } else if (data1 > 1000) {
    Serial.println("Light 1 Fault");
    lcd.setCursor(3, 3);
    lcd.print("Light 1 Fault");
    digitalWrite(BUZZER, HIGH);
  } else if (data2 > 1000) {
    Serial.println("Light 2 Fault");
    lcd.setCursor(3, 3);
    lcd.print("Light 2 Fault");
    digitalWrite(BUZZER, HIGH);
  } else if (data3 > 1000) {
    Serial.println("Light 3 Fault");
    lcd.setCursor(3, 3);
    lcd.print("Light 3 Fault");
    digitalWrite(BUZZER, HIGH);
  } else {
    Serial.println("No Fault");
    lcd.setCursor(2, 3);
    lcd.print("No Fault Detected");
    digitalWrite(BUZZER, LOW);
  }
  delay(6000); // Wait 6 seconds before next check
}