#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2); 

int potenciometer;
int hodnota= 0;

bool firstState = true;

void setup() {
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();

  pinMode(34, INPUT_PULLUP);
  pinMode(35, INPUT_PULLUP);
}

void loop() 
{
  potenciometer = analogRead(13);
  

  float percenta = map(potenciometer,0,4095,0,hodnota); 
  lcd.setCursor(0,0);
  lcd.print(String(percenta));
  delay(100);

  lcd.setCursor(0,1);
  lcd.println("0 - " + String(hodnota));

  if(digitalRead(34) == LOW && firstState == true){
    firstState = false;
    hodnota++;
    Serial.println(hodnota);
    lcd.clear();
    lcd.setCursor(0,1);
    lcd.println("0 - " + String(hodnota));
  }
  if(digitalRead(34) != LOW && firstState != true){
    firstState = true;
  
  }
  if(digitalRead(35) == LOW && firstState == true){
    firstState = false;
    hodnota--;
    Serial.println(hodnota);
    lcd.clear();
    lcd.setCursor(0,1);
    lcd.println("0 - " + String(hodnota));
  }
  if(digitalRead(35) != LOW && firstState != true){
    firstState = true;
  
  }
}