#include "LiquidCrystal_I2C.h"
LiquidCrystal_I2C lcd(0x27, 20, 4);

const int buttonOk = 2;
const int buttonUp = 3;
const int buttonDown = 4;
const int buttonExit = 5;
int buzzer = 13 ;

int buttonStateOk = 0; 
int buttonStateUp = 0;
int buttonStateDown = 0;
int buttonStateExit = 0;


int currentScreen = 0;
int currentMenu = 0;

void setup() {
  Serial.begin(9600);
  lcd.init();   // initializing the LCD
  lcd.backlight(); // Enable or Turn On the backlight

  pinMode(buttonOk, INPUT_PULLUP);
  pinMode(buttonUp, INPUT_PULLUP);
  pinMode(buttonDown, INPUT_PULLUP);
  pinMode(buttonExit, INPUT_PULLUP);
  pinMode(buzzer , OUTPUT);

  lcd.clear();
  lcd.setCursor(6,1);
  lcd.print("LOADING....");
  digitalWrite(buzzer, HIGH);
  delay(2500);
  lcd.clear();
}

void loop() {
  buttonStateOk = digitalRead(buttonOk);
  buttonStateUp = digitalRead(buttonUp);
  buttonStateDown = digitalRead(buttonDown);
  buttonStateExit = digitalRead(buttonExit);


if(buttonStateDown == LOW){
    currentScreen = currentScreen+1;
    // Serial.println(currentScreen);
    if(currentScreen == 7){
      currentScreen = 0;
    }
}

if(buttonStateUp == LOW){
    currentScreen = currentScreen-1;
  //  Serial.println(currentScreen);

    if(currentScreen < 0){
      currentScreen = 6;
    }
}

  printScreen();
  delay(200);
}


void printScreen() {

   if (currentScreen == 0) {
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("->Setting");
    lcd.setCursor(0,1);
    lcd.print("  Configuration");
    lcd.setCursor(0,2);
    lcd.print("  Display");
    lcd.setCursor(0,3);
    lcd.print("  Temperature");

  }

    if (currentScreen == 1) {
         lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("  Setting");
    lcd.setCursor(0,1);
    lcd.print("->Configuration");
    lcd.setCursor(0,2);
    lcd.print("  Display");
    lcd.setCursor(0,3);
    lcd.print("  Temperature");

  }

    if (currentScreen == 2) {
         lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("  Setting");
    lcd.setCursor(0,1);
    lcd.print("  Configuration");
    lcd.setCursor(0,2);
    lcd.print("->Display");
    lcd.setCursor(0,3);
    lcd.print("  Temperature");

  }

    if (currentScreen == 3) {
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("  Setting");
    lcd.setCursor(0,1);
    lcd.print("  Configuration");
    lcd.setCursor(0,2);
    lcd.print("  Display");
    lcd.setCursor(0,3);
    lcd.print("->Temperature");

  }
if (currentScreen == 4)
  {
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("->Network");
    lcd.setCursor(0,1);
    lcd.print("  Brightness");
    lcd.setCursor(0,2);
    lcd.print("  ABC");


  }  

if (currentScreen == 5)
  {
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("  Network");
    lcd.setCursor(0,1);
    lcd.print("->Brightness");
    lcd.setCursor(0,2);
    lcd.print("  ABC");


  } 

  if (currentScreen == 6)
  {
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("  Network");
    lcd.setCursor(0,1);
    lcd.print("  Brightness");
    lcd.setCursor(0,2);
    lcd.print("->ABC");


  } 
}