//====================================================================
//  LCD Library Functions
//====================================================================
// LCD Initialize
//--------------------------------------------------------------------

  void lcd_begin()
  {
    // Begin Wire
    Wire.begin(SDA_PIN, SCL_PIN);
    // Begin LCD
    lcd.begin(SDA_PIN, SCL_PIN);
  }

//--------------------------------------------------------------------
// LCD Clear
//--------------------------------------------------------------------

  void lcd_clear()
  {
    lcd.clear();
    lcd.home();
  }

//--------------------------------------------------------------------
// LCD Testing Back Light
//--------------------------------------------------------------------

  bool lcd_islight() 
  {
    return lcd.getBacklight();
  }

//--------------------------------------------------------------------
// LCD Light On
//--------------------------------------------------------------------

  void lcd_light_on() 
  {
    lcd.backlight();
  }

//--------------------------------------------------------------------
// LCD Light Off
//--------------------------------------------------------------------

  void lcd_light_off()
  {
    lcd.noBacklight();
  }

//--------------------------------------------------------------------
// LCD Light Toggle
//--------------------------------------------------------------------

  void lcd_light_toggle() 
  {
    if(lcd_islight()) 
    {
      lcd_light_off();
    } 
    else 
    {
      lcd_light_on();
    }
  }

//--------------------------------------------------------------------
// LCD Line 1
//--------------------------------------------------------------------

  void lcd_line1(String line1) 
  {
    lcd.setCursor(0, 0);
    lcd.print(line1);
  }

//--------------------------------------------------------------------
// LCD Line 2
//--------------------------------------------------------------------

  void lcd_line2(String line2) 
  {
    lcd.setCursor(0, 1);
    lcd.print(line2);
  }

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

  String lcd_center(String text) 
  {
    int     space       = (16 - text.length())/2;
    String  txt_space   = "";
    
    for(int i=0; i<space; i++) {
      txt_space += " ";
    }
    
    return txt_space + text;
  }