DFR0231

  NFC Module for Arduino (SKU:DFR0231)     NFC Module for Arduino   Introduction Your credit cards: gone. Bus pass and train tickets: vanished.Welcome to Near Field Communications (NFC), a contactless, Wi-Fi-lite style tech that could already be in your smartphone, and could soon be a regular feature of your commute. Near Field Communications(NFC) is a set of short-range wireless technologies, typically requiring a distance of 10cm or less, for two devices such as smartphones or the similar things very close to each other to establish communication. Communication is also possible between a NFC device and unpowered NFC chips such as tags, stickers, key fobs and cards which do not require batteries. The NFC Module for Arduino is designed to extend this powerful feature for your project or application based on Arduino.It integrates a PN532 NFC controller from Philips.The driver interface for this product is UART interface of the microcontroller. So it's possible for you to test it via a USB to UART converter directly. On the other hand, for the applications with microcontroller, the module provides an event for your processor when detects the NFC tags, stickers, key fobs, or cards via high speed serial uart. Applications      Contactless payment systems Bluetooth and Wi-Fi connections Social networking situations, such as sharing contacts, photos, videos or files Electronic identity documents and keycards Smartphone automation and NFC tags Specification         Working Voltage: 3.3v or 5v Host interface: UART Integrate PN532 NFC controller Supports ISO 14443A/MIFARE Supports ISO 14443B in reader/writer mode only Typical max operating distance for detecting NFC tags from 20 to 50mm depending on the antenna *size of the tag Serve for contactless communication at 13.56MHz Size: 11cm x 5cm Connect Diagram NFC Module connect diagram Sample Code /* # Editor : Adrian # Date : 2013.04.18 # Ver : 0.1 # Product: NFC Module for Arduino # SKU : DFR0231 # Description: # When the a card close to the device , the PC will receive the data # Connect the NFC Card's TXD, RXD, GND, +3.3V to Nano's D0RX, D1TX, GND, +3. 3V # Or connect the NFC Card's TXD, RXD, GND, +5V to Nano's D0RX, D1TX, GND, +5 V PN532 reads the tag by Arduino mega/Leonardo command list: #wake up reader send: 55 55 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff 03 fd d4 14 01 17 0 0 return: 00 00 FF 00 FF 00 00 00 FF 02 FE D5 15 16 00 #get firmware send: 00 00 FF 02 FE D4 02 2A 00 return: 00 00 FF 00 FF 00 00 00 FF 06 FA D5 03 32 01 06 07 E8 00 #read the tag send: 00 00 FF 04 FC D4 4A 01 00 E1 00 return: 00 00 FF 00 FF 00 00 00 FF 0C F4 D5 4B 01 01 00 04 08 04 XX XX XX XX 5A 00 XX is tag. */ const unsigned char wake[24]={ 0x55, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x03, 0xfd, 0xd4, 0x14, 0x01, 0x17, 0x00};//wake up NFC module const unsigned char firmware[9]={ 0x00, 0x00, 0xFF, 0x02, 0xFE, 0xD4, 0x02, 0x2A, 0x00};// const unsigned char tag[11]={ 0x00, 0x00, 0xFF, 0x04, 0xFC, 0xD4, 0x4A, 0x01, 0x00, 0xE1, 0x00};//detecti ng tag command const unsigned char std_ACK[25] = { 0x00, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0x00, 0xFF, 0x0C, \ 0xF4, 0xD5, 0x4B, 0x01, 0x01, 0x00, 0x04, 0x08, 0x04, 0x00, 0x00, 0x00, 0x00, 0x4b, 0x00}; unsigned char old_id[5]; unsigned char receive_ACK[25];//Command receiving buffer //int inByte = 0; //incoming serial byte buffer #if defined(ARDUINO) && ARDUINO >= 100 #include "Arduino.h" #define print1Byte(args) Serial1.write(args) #define print1lnByte(args) Serial1.write(args),Serial1.println() #else #include "WProgram.h" #define print1Byte(args) Serial1.print(args,BYTE) #define print1lnByte(args) Serial1.println(args,BYTE) #endif void setup(){ Serial.begin(9600); // open serial with PC Serial1.begin(115200); //Serial2.begin(115200); wake_card(); delay(100); //open serial1 with device read_ACK(15); delay(100); display(15); } void loop(){ send_tag(); read_ACK(25); delay(100); if (!cmp_id ()) { if (test_ACK ()) { display (25); delay (100); } } copy_id (); } void copy_id (void) {//save old id int ai, oi; for (oi=0, ai=19; oi