Development v12

Warning - Product Update

All the resources present on this section belong to Waspmote v12, Waspmote Plug & Sense! v12 and Meshlium v3.8.

If you have a Waspmote v15, Waspmote Plug & Sense! v15 or Meshlium v4.0 please go to the new Development Section.

Check what is your version and what are the differences between the old and the new one in this document.

» RFID1356 07: Several Cards Counter

This sketch counts the number of times the reader has identified several cards which have been defined before. It reads a card and compares if it is inside a predefinied group of cards.

Required Materials

1 x Waspmote
1 x Battery
1 x Coin cell
1 x RFID 13.56MHz board
1 x RFID 13.56MHz antenna
1 x RFID Tag

Notes

- Remember to connect the battery to Waspmote for proper operation.
- Don't write address 0, 3, 7, 11, 15, ... if you are not an advanced user. You could leave your tag unaccessible.
- Address 0 contains the IC manufacturer data. This block has read-only access.
- Address 3, 7, 11 contains the secret keys A and B. Writing in them will change access keys and conditions.
- This example can be executed in Waspmote v12 and Waspmote v15

Code

/*
 *  ------[RFID1356_07] RFID/NFC Several Cards Counter --------
 *
 *  Explanation: This sketch counts the number of times the reader has
 *  identified several cards which have been defined before. It reads
 *  a card and compares if it is inside a predefinied group of cards.
 *  
 *  Copyright (C) 2015 Libelium Comunicaciones Distribuidas S.L.
 *  http://www.libelium.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 *  Version:                0.2
 *  Design:                 David Gascón
 *  Implementation:         Ahmad Saad, Javier Solobera
 */

#include <WaspRFID13.h>  

// stores the status of the executed command:
uint8_t state;

// little buffer for the ATQ (answer to request):
ATQ ans;

// stores the UID (Unique IDentifier) of a card:
UIdentifier UID;

// EDIT: number of possible cards:
#define nCards 3

// EDIT: the cards we have:
//   card 0: 0xFC,0x11,0x67,0x9B
//   card 1: 0x4C,0x37,0x4E,0x3C
//   card 2: 0xCE,0xC8,0x87,0x63

// EDIT: card vector (it is a pseudo-multidimensional matrix; size = nCards*4):
UIdentifier vCards [nCards] = { 
  {0xFC,0x11,0x67,0x9B},
  {0x4C,0x37,0x4E,0x3C},
  {0xCE,0xC8,0x87,0x63}
};

// store the hits in each card; size = nCards:
uint8_t hits[nCards] = {
  0, 0, 0};

// stores the index of the present card:
signed int card = -1;

void setup()
{
  USB.ON();
  USB.println(F("RFID_07 Example")); 

  //Swithcs ON the module and asign the socket
  RFID13.ON(SOCKET0); 
  USB.println(F("RFID/NFC @ 13.56 MHz module started"));
}

void loop()
{
  USB.print(F("\r\n++++++++++++++++++++++++++++++++++++"));

  //////////////////////////
  // 1. Init the RFID reader 
  //////////////////////////
  state = RFID13.init(UID, ans);

  if (state == 1)  
  {  
    USB.print(F("\r\nRequest error - no card found"));
  }  
  else
  { 
    USB.print(F("\r\nRequest | Answer: "));
    RFID13.print(ans, 2);

    USB.print(F(" UID: "));
    RFID13.print(UID, 4); // show the ATQ (answer to request) 

    if (state == 0)
    {
      /////////////////////////////////////////
      // 2. Search card UID amongst vCards UIDs
      /////////////////////////////////////////
      card = RFID13.searchUID(*vCards, UID, nCards); // search if the read card is inside the data base

      if (card != -1) 
      {// if so, this is one of OUR cards
        USB.print(F("\r\n  Card number "));
        USB.print(card);
        USB.print(F(" identified. Access granted."));
        hits[card]++;  // add one more hit for the read card

        Utils.blinkLEDs(100);    
      }  
      else 
      {// the read card is not one of OUR cards
        USB.print(F("\r\n  ** Card not present in the data base. Access denied."));
        for (int i=0; i<10; i++) {// blink the LED fast to show not-OK
          Utils.blinkLEDs(100);
        }
      }
    }
    else  
    {// if state is not 0, then the card was not properly read

      USB.print(F("\r\n  ** Card not properly read. Please retry. "));
      for (int i=0; i<10; i++) {// blink the LED fast to show not-OK
        Utils.blinkLEDs(100);
      }   
    }
  }

  USB.print(F("\r\n  Number of hits (cards 0, 1, 2, ..): ")); // write the accumulated hits

  RFID13.print(hits, nCards );

  delay(1000); // wait 1 second each loop
}

Output

Request | Answer: 0 4

AnticollSelect: 0 | Answer: FA C8 2E 40

Card number 0 identified. Access granted.
Number of hits (cards 0, 1, 2, ..): 1 0 0

+++++++++++++++++++++++++++++++++++
Request | Answer: 0 2

AnticollSelect: 0 | Answer: 7C 82 1 19

** Card not present in the data base. Access denied.
Number of hits (cards 0, 1, 2, ..): 1 0 0

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