13.56Mhz RFID module - IOS/IEC 14443 type a
Introduction
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 39199 mm（DIP28）
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/2010/03/bus-pirate-fun-rdm880-rfid-module/
-
Python library to access the RDM880 https://github.com/synack/rfid
-
Maker’s site http://www.datarfid.com/doce/Product/pic_69.html
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]);
}
}
}
Resource
-
API and Demo Code on Windows and Linux for13.56M RFID Reader (download this tools if you want to write data to your tag)
Help us make it better
Welcome to the new documentation system of Seeed Studio. We have made a lot of progress comparing to the old wiki system and will continue to improve it to make it more user friendly and helpful. The improvement can't be done without your kindly feedback. If you have any suggestions or findings, you are most welcome to submit the amended version as our contributor via Github or give us suggestions in the survey below, it would be more appreciated if you could leave your email so that we can reply to you. Happy Hacking!