#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

// Pin Definition
#define LED1 12
#define LED2 11
#define LED3 10
#define LDR A0


void setup() {
  // LCD Init
  lcd.init();
  lcd.backlight();
  lcd.setCursor(3, 0);
  lcd.print("It is Started.");
  delay(1000);
  lcd.clear();
  delay(200);
  lcd.setCursor(1,0);
  lcd.print("*Status Update...*");
  // Defining Outputs
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  // Defining Inputs for LDR
  // pinMode(LDR, INPUT);
  Serial.begin(9600);
}

void loop() {
  // Taking inputs from the LDR
  int x = analogRead(LDR);
  int brightness = map(x,8,1015,100,0);
  lcd.setCursor(0,1);
  lcd.print("Brightness = ");
  lcd.print(brightness);
  lcd.print("%");
  // Checking for Darkness
  if (brightness < 40){
    digitalWrite(LED1,1);
    digitalWrite(LED2,1);
    digitalWrite(LED3,1);
    lcd.setCursor(0,2);
    lcd.print("LEDs = On ");
  }
  // Check for Brightness
  else {
    digitalWrite(LED1,0);
    digitalWrite(LED2,0);
    digitalWrite(LED3,0);
    lcd.setCursor(0,2);
    lcd.print("LEDs = Off");
  }
}