boolean found=false;
byte storedCard[4];   // Stores an ID read from EEPROM
byte readCard[4];   // Stores scanned ID read from RFID Module
byte tempCard[8];  // Stores serial Link bytes
byte DATAB[500]; //Can be eeprom


void setup() {
  // put your setup code here, to run once:
DATAB[15]="01";DATAB[16]="0D";DATAB[17]="00";DATAB[18]="FF"; //codes room 0
//DATAB[20]="02";DATAB[21]="2D";DATAB[22]="20";DATAB[23]="2F"; //codes room 0
DATAB[100]="02";DATAB[101]="2D";DATAB[102]="20";DATAB[103]="2F"; //codes room3

readCard[0]="02";readCard[1]="2D";readCard[2]="20";readCard[3]="2F"; //search pattern readed from RFID


Serial.begin(9600);

find_ID_Room(0);

}

void loop() {
  // put your main code here, to run repeatedly:

}



void find_ID_Room(byte station) {
 int startcards = 10;
 int endcards = 480;
 int k =0;
 int j =10;
 int l = 0;
 byte d;
 found=false;

   
   do {
   if (l>3) {l=0;j=j+5;}
   storedCard[l] = DATAB[j+l];
  if (storedCard[l] == readCard[l]) { found = true; k++;} else {found = false; k=0;}
    l++;
    }  while(k<4 && j<endcards);
d=((j-10) / 30) % 16;

Serial.println(d); //found on position (ROOM assigned RFID-4 pieces per room every 5 bytes)
}