Arduino NFC 模块 (DFRobot) 不读取 Whiztags

Question

我买了 NFC module from DFRobot and I'm using their example program with some changes since I only want to read the UID of my tag. It works great with the tag that came with it but it doesn't recognize any of my NFC Whiztags（包含 Topaz 512 芯片）。

有人知道我该如何解决这个问题吗？

这是我的代码：

#include <SoftwareSerial.h>
/* 

 # 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, +5V


 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 00
 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.

 */

 //************* start **************

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};//detecting 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};
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) mySerial.write(args)
#define print1lnByte(args)  mySerial.write(args),mySerial.println()
#else
#include "WProgram.h"
#define print1Byte(args) mySerial.print(args,BYTE)
#define print1lnByte(args)  mySerial.println(args,BYTE)
#endif

SoftwareSerial mySerial(10, 11); // RX, TX
unsigned char myUID[12] = "70 89 7E 43";

void setup()
{
  Serial.begin(9600);   // open serial with PC
  mySerial.begin(115200);    //open mySerial with device
  wake_card();
  delay(200);
  Serial.println("Scanning..."); 

}

void loop()
{
  send_tag(); 
  read_ACK(25);
  delay(100);
      if (test_ACK ()) {
        copy_id ();
        displayuid ();
         delay (10000);
       }

    }


void copy_id (void) 
{//save old id
  int ai, oi;
  for (oi=0, ai=19; oi<5; oi++,ai++) {
    old_id[oi] = receive_ACK[ai];
  }
}

int test_ACK (void) 
{// return true if receive_ACK accord with std_ACK
  int i;
  for (i=0; i<19; i++) {
    if (receive_ACK[i] != std_ACK[i])
      return 0;
  }
  return 1;
}


void send_id (void) 
{//send id to PC
  int i;
  Serial.print ("ID: ");
  for (i=19; i<= 23; i++) {
    Serial.print (receive_ACK[i], HEX);
    Serial.print (" ");
  }
  Serial.println ();
}


void UART1_Send_Byte(unsigned char command_data)
{//send byte to device
  print1Byte(command_data);
#if defined(ARDUINO) && ARDUINO >= 100
  mySerial.flush();// complete the transmission of outgoing serial data 
#endif
} 


void UART_Send_Byte(unsigned char command_data)
{//send byte to PC
  Serial.print(command_data,HEX);
  Serial.print(" ");
} 


void read_ACK(unsigned char temp)
{//read ACK into receive_ACK[]
  unsigned char i;
  for(i=0;i<temp;i++) {
  receive_ACK[i]= mySerial.read();
  }
}

void wake_card(void)
{//send wake[] to device
  unsigned char i;
  for(i=0;i<24;i++) //send command
  UART1_Send_Byte(wake[i]);
}


void send_tag(void)
{//send tag[] to device
  unsigned char i;
  for(i=0;i<11;i++) //send command
  UART1_Send_Byte(tag[i]);
}


void displayuid(void)
{//send receive_ACK[] to PC
  unsigned char i;
  for(i=0;i<4;i++) //send command
  UART_Send_Byte(old_id[i]);
  Serial.println();
}


//*********** end *************

Answer 1

您的reader模块包含一个NXP PN532 NFC传输模块IC。您当前使用以下命令轮询标签：

tag = { 0x00, 0x00, 0xFF, 0x04, 0xFC, <b>0xD4</b>, <b>0x4A</b>, <b>0x01</b>, <b>0x00</b>, 0xE1, 0x00};

这个命令是一个InListPassiveTarget命令（命令代码D4 4A），参数

初始化标签的最大数量 (MaxTg) = 1 (0x01) 和
标签协议类型 (BrTy) = ISO/IEC 106 kbps 时的 14443A (0x00)。

因此，您只能检测使用 ISO/IEC 14443-3 中定义的完整 A 类协议（包括防冲突）的标签。例如，此类标签是

NFC 论坛 2 类标签，
使用 A 类协议变体的 NFC 论坛 4 类标签，
NXP MIFARE Ultralight / Classic / DESFire / NTAG，
恩智浦 NTAG，
英飞凌my-D,
Kovio 2K,
可能还有其他人。

Whiztags 包含一个 Topaz 512 芯片（这是一个 NFC Forum Type 1 标签）。此标记类型仅部分实现 ISO/IEC 14443 Type A（不支持防冲突机制）。因此，上述轮询命令不会枚举此类标签。相反，您需要将 BrTy 参数切换为 "Innovision Jewel tag at 106 kbps" (0x04)。修改后的命令（包括更新校验和字节）如下所示：

tag = { 0x00, 0x00, 0xFF, 0x04, 0xFC, 0xD4, 0x4A, 0x01, <b>0x04</b>, <b>0xDD</b>, 0x00};

您可以在 PN532 user manual 中找到更多详细信息。

Arduino NFC 模块 (DFRobot) 不读取 Whiztags

Arduino NFC Module (DFRobot) not reading Whiztags

tags

arduino

nfc

uart

arduino-uno