//--------LIBRERIE-------------------------
#include <LiquidCrystal_I2C.h> //lcd
#include <Keypad.h>
#include <EEPROM.h>
//-----------------------------------------

//----------------LCD----------------------
LiquidCrystal_I2C lcd(0x27,20,4);
//-----------------------------------------


//-----Tastierino------------
const uint8_t ROWS = 4;
const uint8_t COLS = 4;

char keys[ROWS][COLS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

uint8_t colPins[COLS] = { 5, 4, 3, 2 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);


//------------------------MENU-------------------------


//-------------------------------------------------------

//------------TMP-------------
const float BETA = 3950;
int val = 0;
int sensore = A0;
int temp = 0;
//-----------------------------

int stato = 0;
bool x = 0;
bool o = 0;
bool i = 0;
bool time = 0;
//--------------------------








//--------------------------

void setup()
{
//----------EEPROM------------
  int v_val = EEPROM.read(0);
//----------------------------
  
//----------LCD---------------
   lcd.init(); 
//----------------------------

//----------TMPSENS-----------
  pinMode(sensore, INPUT);
  Serial.begin(9600);
//----------------------------
  
}

//--------------------------







//-------------------------- 
int key = 0;









void loop()
 {
  
   leggo_temp();
  
    switch(stato){
    
      case 0:
     
      showSpalshScreen();
      lcd.clear();
      if(x == 1) stato = 1;
    
      break;
    
    
        case 1:

         
         LCD();
         menu();
         lcd.setCursor(0,1);
         char key = keypad.getKey();
         lcd.print(key);
         Serial.print(stato);
         break;
    
    case 2:

     Serial.print("Aaaa");
     lcd.clear();
     stato = 3;
      
    break;




    case 3:


    Serial.print(stato);
    writing();

    break;

  }

}













void leggo_temp(){
  
  val = analogRead(sensore);
  temp = 1 / (log(1 / (1023. / val - 1)) / BETA + 1.0 / 298.15) - 273.15;
  if(temp >= -9 ){
    lcd.setCursor(14,0);
    lcd.print(" ");
  }
  /*
  Serial.print("Temperature: ");
  Serial.print(temp);
  Serial.println(" ℃");
  */

}

void LCD(){

     lcd.setCursor(0, 0);
     lcd.print("Temperature:");
     
     lcd.setCursor(12, 0);
     lcd.print(temp);
     
     lcd.setCursor(15, 0);
     lcd.print("C");
}


void menu(){
  
  bool conf = 0;
  char key = keypad.getKey();
   if(key == 'A') stato = 2;
   if(key == 'D') conf = 0;
   if(key == 'C') conf = 1;
}

void showSpalshScreen() {
  lcd.setCursor(0,0);
  lcd.print("Carotti Spa.");
  lcd.setCursor(3, 1);
  String message = "Loading...";
  for (byte i = 0; i < message.length(); i++) {
    lcd.print(message[i]);
    delay(50);
  }
  delay(500);
  x = 1;
}


void writing (){

  lcd.setCursor(0,0);
  lcd.print("Impostare Temp:");
  char key = keypad.getKey();
  lcd.setCursor(0,1);
  lcd.print(key);
  if(key > 80){
    lcd.setCursor(0,1);
    lcd.print("ERROR");
    delay(1000);
    lcd.print("MAX Value 80");
    //lcd.clear();
  }
  
}



/* valore che deve ricordare EEPROM
 int valore = 100;
  EEPROM.write(0, valore);
  */