/*
 Project: LCD2004 I2C module
 Function: Dispalys symbols and text, you can display your charakters if you enter them in serial monitor
 Compatible with the Arduino IDE 1.0
 */
//***********************************************************
#include <LiquidCrystal_I2C.h>//include library code
//*********************************************************
#if defined(ARDUINO) && ARDUINO >= 100
#define printByte(args)  write(args);
#else
#define printByte(args)  print(args,BYTE);
#endif
uint8_t heart[8] = {0x0, 0xa, 0x1f, 0x1f, 0xe, 0x4, 0x0};//symbol heart
LiquidCrystal_I2C lcd(0x3F, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);//initialise the LCD 1602 I2C
void setup()
{
  Serial.begin(9600);  //initialize serial communication at 9600 bps
  lcd.begin (20, 4);//define the LCD as 20 column by 4 rows 
  //switch on the backlight
  lcd.setBacklightPin(3, POSITIVE);
  lcd.setBacklight(HIGH);
  lcd.createChar(3, heart);
  lcd.setCursor(0, 0);//sets the cursor to 1 row 1 column
  for (int i = 0; i < 20; i++)  lcd.printByte(3);//prints symbol
  lcd.setCursor(0, 1);//sets cursor to 2 row 1 column
  lcd.printByte(3);//prints symbol
  lcd.print(" Welcome to       ");//prints message
  lcd.printByte(3);//prints symbol
  lcd.setCursor(0, 2);//sets cursor to 3 row 1 column
  lcd.printByte(3);//prints symbol
  lcd.print(" ACOPTEX.COM !!!  ");//prints message
  lcd.printByte(3);//prints symbol
  lcd.setCursor(0, 3);//sets cursor to 4 row 1 column
  for (int i = 0; i < 20; i++)  lcd.printByte(3);//prints symbol
  delay (3000);//sets delay for 3 seconds
  lcd.clear();//clears the screen
// Wait and then tell user they can start the Serial Monitor and type in characters to
// Display. (Set Serial Monitor option to "No Line Ending")
  lcd.setCursor(0,0); //Start at character 0 on line 0
  lcd.print("Start Serial Monitor");
  lcd.setCursor(0,1);
  lcd.print("Type chars 2 display"); 
  
}
void loop()
{
   if (Serial.available()) {
      // wait a bit for the entire message to arrive
      delay(100);
      // clear the screen
      lcd.clear();
      // read all the available characters
      while (Serial.available() > 0) {
        // display each character to the LCD
        lcd.write(Serial.read());
      }
    }
}