/*  Name     : main.c
 *  Purpose  : Source code for RFID Interfacing with Arduino.
 *  Author   : Gemicates
 *  Date     : 22-01-2018
 *  Website  : www.gemicates.org
 *  Revision : None
 */
#include <LiquidCrystal.h>
#include <SoftwareSerial.h>

// initialize the library with the numbers of the interface pins 

SoftwareSerial RFID(0, 1);
LiquidCrystal lcd(4, 5, 6, 7, 8, 9, 10, 11, 12, 13);            //RS, EN, D1, D2, D3, D4,D5,D6,D7
 
void setup() 
{
  RFID.begin(9600);                                             //RFID communication enabling by 9600 baud rate
  lcd.begin(16, 2);                                             // set up the LCD's number of columns and rows
}
 
void loop() 
{
  int index =0 ;                                                //integer for storing character of ID
  char unit;
  String msg;                                                   //memory for storing the characters of ID

 //while no card is in field of action
 
 if(msg==0)
 {
  lcd.setCursor(0,0);                                           //move courser to first line
  lcd.print(" TAG is not in  ");                                //prints that sentence
  lcd.setCursor(0,1);                                           //move courser to second line
  lcd.print("field of action ");                                //prints that sentence
 }

 while(RFID.available()>0)
 {
  //when card is in field
  lcd.setCursor(0,0);                                           //move courser to first line
  lcd.print("TAG ID number is");                                //prints that sentence
  lcd.setCursor(0,1);                                           //move courser to second line
  lcd.print("                ");                                //prints 12 characters on LCD

  //clearing previos data
 
  unit = RFID.read();                                           //storing 12 characters one by one
  index++;
  msg += unit;
 
  if(index == 12)  
  {
    lcd.setCursor(0,1);
    lcd.print(msg);
    break; 
  }
 }

 msg="";                                                        //clearing msg container
 delay(1000);                                                   //giving delay for persistence of vision
}