3 replies to this topic

[TheMo]

Hi all,

 

I have a 13.56Mhz rfid module which I want to use with my netduino plus2.

Searched the internet and did not find anything that could get me started.

This module is a mifare reader module. www.seeedstudio.com/wiki/index.php?title=13.56mhz_rfid_module-_ios/iec_14443_type_a

I am new with this and need some help.

 

Thanks.

 

[jrlyman3]

The link you supplied doesn't seem to work.  If your device is: http://www.seeedstud...KHz_RFID_Reader then it looks pretty simple, ground, +5, transmit, and receive.  You would use some code like:

 

       using System.IO.Ports;

    m_SerialPort = new SerialPort(port, 9600, Parity.None, 8, StopBits.One);

 

You can find information on SerialPort here: http://netmf.codeplex.com/ or just search on the web.

 

Have fun.

 

--John

[TheMo]

Hi john,

Thanks for your reply.
I probably pasted it wrong. Hope this link will work.:

http://www.seeedstud...EC_14443_type_a

I already downloaded the .net micro framework.
In your example you open a serial port. Which port do I need to use? 

Here is the complete page of the rfid module.

 

13.56Mhz RFID module - IOS/IEC 14443 type a

From Wiki ??????

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Contents

 [hide] 

• 1 Introduction
• 2 Specification
• 3 Resource
• 4 How to buy
• 5 See Also
• 6 Licensing
• 7 External Links
• 8 Connecting to an Arduino
  • 8.1 Schematics
    • 8.1.1 Connecting to an Arduino
    • 8.1.2 Software

Introduction

Model:RFR105A1M

 

 

Specification

• Model No. RDM880-T-A
• R/W chip MFRC500?MFRC400?MFRC531?MFRC632
• Standard ISO/IEC 14443 type a
• Frequency 13.56MHz
• Baud Rate 9600-115200bit/s?configurable, default9600?
• Power supply DC5V(5%)
• Current <70mA
• Operating range 30-100mm?reading range depend on antenna and card/tag?
• interface TTL electrical level
• Working temperature -10 degree to 70 degree
• Storage temperature -20 degree to 80 degree
• Size 39*19*9 mm?DIP28?

Resource

• RDM880 Document
• RDM880 LED Control.doc
• API and Demo Code on Windows and Linux for13.56M RFID Reader (download this tools if you want to write data to your tag)

How to buy

Click here to buy: http://www.seeedstud...pe-a-p-196.html

See Also

Other related products and resources.

Licensing

This documentation is licensed under the Creative Commons Attribution-ShareAlike License 3.0 Source code and libraries are licensed under GPL/LGPL, see source code files for details.

External Links

Links to external webpages which provide more application ideas, documents/datasheet or software libraries.

• Basic example, use the RDM880 with a buspirate: http://neophob.com/2...80-rfid-module/
• Python library to access the RDM880 https://github.com/synack/rfid
• Maker's site http://www.datarfid....uct/pic_69.html
• Eduardo Velloso'blog

Connecting to an Arduino

The SeeedStudio 13.56Mhz RFID module is an RFID reader capable support ISO14443A, Mifare series card over a serial line. It can easely be attached to an arduino to have RFID fun.

 

Schematics

       .-----------------------------.

       | [1][2]      [5][4][3][2][1] |

       |  J3              J1         |

       |           RDM880 (top view) |

       |                  J2         |

       |             [5][4][3][2][1] |

       .-----------------------------.

J1:(accessory pins)

  PIN 1 -- LEDG (Green led)

  PIN 2 -- 5V (DC)

  PIN 3 -- GND

  PIN 4 -- LEDR (Red led)

  PIN 5 -- BUZ (Buzzer)

J1 Alt: Note that some units are arranged:

  PIN 1 -- 

  PIN 2 --

  PIN 3 -- LED1 (Green led)

  PIN 4 -- LED2 (RED led)

  PIN 5 -- BUZ (Buzzer)

J2:(Communication using serial 9600 8N1 TTL level)

  PIN 1 -- RESET (pull low to reset e.g. set default baudrate)

  PIN 2 -- RX

  PIN 3 -- TX

  PIN 4 -- GND

  PIN 5 -- 5V (in)

J3:

  PIN 1 -- + Antenna

  PIN 2 -- - Antenna 

Connecting to an Arduino

Use the J2 pin headers to connect 5 volt and the ground as shown in the picture. Connect the TX (Pin 3) to the Arduino digital pin 2 and RX to digital pin 3 as shown bellow. It is not needed to connect the reset as long as you don't change the default connection speed.

 

Software

[PROTOCOL-821-880_2_.pdf] describes the protocol used for now we only created a small program to read the RDIF tag number when pressing enter in the Serial monitor of the Arduino IDE

Warning: when writing your sketches use only system, Type-A and Mifare commands. ISO14443-B and ISO15693 are accepted only by RDM880-T-E (not 'A') reader! And as of today (21 may, 2012) remember that this module does not support anticollision for Mifare cards -- sometimes it tells there's more than one card, but there's no way to address the non-default card. It's a firmware issue, confirmed by manufacturer.

#include <SoftwareSerial.h> 

SoftwareSerial mySerial(2, 3);

char txrxbuffer[255];

char get_readID[] = { 0xAA , 0x00, 0x03, 0x25, 0x26, 0x00, 0x00, 0xBB };

void setup()

{

Serial.begin(57600);

Serial.println("Hit Enter to read the RFID number");

mySerial.begin(9600);

}

void loop() // run over and over

{ 

int counter = 0;

if (mySerial.available())

  Serial.print(mySerial.read(),HEX);

if (Serial.available()){

    Serial.read();

    Serial.println(">");

    for (counter =0 ; counter < 8 ; counter++){

      mySerial.write(get_readID[counter]);

    }

}

}

[jrlyman3]

If you look at the spec sheet http://www.netduino....plus2/specs.htm you'll see

that there are 4 serial ports.  "COM1" ... "COM4".  Since each pin has multiple functions but

can only do one at a time, it all depends on what functions you're using.  I suggest you start

with "COM1" and hook:

 

    NP2 Pin D0 (RX)  --->  RFID  J2  Pin3 (TX)

    NP2 Pin D1 (TX)  --->  RFID  J2  Pin2 (RX)

    Hook up Gnd and +5 on J1

 

And you should be ready to go.  You will have to translate the Arduino example to C#.  Here

are couple hints, more information is at http://arduino.cc/en...erence/HomePage :

 

     Arduino uses the Serial object to talk to the host computer.  Since they only have a single

     serial port (in hardware) they use the SoftwareSerial  class (mySerial) to talk to the device.

     So convert:

         Serial.println  --> Debug.Print

         mySerial.print  -->  m_SerialPort.Write

 

Of, course they're not one-for-one but we have to leave a little fun for you  .

 

Enjoy,

 

-- John