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

LiquidCrystal_I2C lcd(0x27, 16, 2);
const int btnNext = 2;
const int btnPrev = 3;
const int btnConfirm = 4;
String optiuni[] ={"Mod A", "Mod B", "Mod C"};

int index = 0;
int total = 3;

void setup() {
  pinMode(btnNext, INPUT_PULLUP);
  pinMode(btnPrev, INPUT_PULLUP);
  pinMode(btnConfirm, INPUT_PULLUP);
  lcd.init();
  lcd.backlight();
  afiseazaMeniu();


}

void loop() {
  if(digitalRead(btnNext) == LOW) {
    index = (index + 1) % total;
    afiseazaMeniu();
    delay(300);

  }
  if(digitalRead(btnPrev) == LOW){
  index= (index - 1 + total) % total;
  afiseazaMeniu();
  delay(300);
    }

if (digitalRead(btnConfirm) == LOW){
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Mod Selectat:");
  lcd.setCursor(0,1);
  lcd.print(optiuni[index]);
  delay(2000);
  afiseazaMeniu();
}
}
void afiseazaMeniu(){
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Selectare mod:");
  lcd.setCursor(0,1);
  lcd.print(optiuni[index]);
}