#include <LiquidCrystal_I2C.h>
#include <Bounce2.h>
#include <Ticker.h>
#include <EEPROM.h>

LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display
Bounce b1 = Bounce();
Bounce b2 = Bounce();
int temp = 150;
int prevTime;
int prevWert;
bool firstTime;
int counter1 = 0;
int counter2 = 0;
int counter3 = 0;
int plus = 1;
int minus = 1;
bool isPressed = false;



void anzeigen(int temp)
{
  lcd.clear();
  lcd.setCursor(3,0);
  lcd.print(temp);
  lcd.print(" grad");
}

void tempEinstellen ()
{
  if(!b1.read())
  {
    isPressed = true;
    if(counter1 > 5)
    {
      plus = 5;
    }
    else
    {
      plus = 1;
    }
    temp = temp + plus;
    counter1++;
    firstTime = true;
  }
  else if(!b2.read())
  {
    isPressed = true;
    if(counter2 > 5)
    {
      minus = 5;
    }
    else
    {
      minus = 1;
    }
    temp = temp - minus;
    counter2++;
    firstTime = true;
  }
  else
  {
    isPressed = false;
    counter1 = 0;
    counter2 = 0;
  }
  if(temp >=450)
  {
    temp = 450;
  }
  if(temp <= 150)
  {
    temp = 150;
  }

  if(!isPressed && firstTime)
  {
    if(counter3 >=5)
    {
      lcd.clear();
      byte temp1er = temp % 10;
      byte temp10er = temp/10;
      EEPROM.write(0,temp1er);
      EEPROM.write(1,temp10er);
    }
    if(counter3 >= 6)
    {
      anzeigen(temp);
    }
    if(counter3 >= 7 )
    {
      lcd.clear();
    }
    if(counter3 >= 8)
    {
      anzeigen(temp);
      firstTime = false;
      counter3 = 0;
    }
    counter3++;
  }
}

Ticker t1(tempEinstellen,200);

void setup()
{
  Serial.begin(9600);
  lcd.init();                      // initialize the lcd 
  // Print a message to the LCD.
  lcd.backlight();
  lcd.setCursor(3,0);
  lcd.print("Hello, world!");
  b1.attach(2, INPUT_PULLUP);
  b2.attach(3, INPUT_PULLUP);
  b1.interval(10);
  b2.interval(10);
  t1.start();
  temp = EEPROM.read(0)+EEPROM.read(1)*10;
}

void loop()
{
  t1.update();
  b1.update();
  b2.update();

  if(temp != prevWert)
  {
    anzeigen(temp);
  }
  prevWert = temp;
}