Question

我有一个RFID-RC522（MF-RC522）模块，我正在使用Arduino草图程序。我已经下载了示例代码：

/*
 * --------------------------------------------------------------------------------------------------------------------
 * Example sketch/program showing how to read data from a PICC to serial.
 * --------------------------------------------------------------------------------------------------------------------
 * This is a MFRC522 library example; for further details and other examples see: https://github.com/miguelbalboa/rfid
 * 
 * Example sketch/program showing how to read data from a PICC (that is: a RFID Tag or Card) using a MFRC522 based RFID
 * Reader on the Arduino SPI interface.
 * 
 * When the Arduino and the MFRC522 module are connected (see the pin layout below), load this sketch into Arduino IDE
 * then verify/compile and upload it. To see the output: use Tools, Serial Monitor of the IDE (hit Ctrl+Shft+M). When
 * you present a PICC (that is: a RFID Tag or Card) at reading distance of the MFRC522 Reader/PCD, the serial output
 * will show the ID/UID, type and any data blocks it can read. Note: you may see "Timeout in communication" messages
 * when removing the PICC from reading distance too early.
 * 
 * If your reader supports it, this sketch/program will read all the PICCs presented (that is: multiple tag reading).
 * So if you stack two or more PICCs on top of each other and present them to the reader, it will first output all
 * details of the first and then the next PICC. Note that this may take some time as all data blocks are dumped, so
 * keep the PICCs at reading distance until complete.
 * 
 * @license Released into the public domain.
 * 
 * Typical pin layout used:
 * -----------------------------------------------------------------------------------------
 *             MFRC522      Arduino       Arduino   Arduino    Arduino          Arduino
 *             Reader/PCD   Uno/101       Mega      Nano v3    Leonardo/Micro   Pro Micro
 * Signal      Pin          Pin           Pin       Pin        Pin              Pin
 * -----------------------------------------------------------------------------------------
 * RST/Reset   RST          9             5         D9         RESET/ICSP-5     RST
 * SPI SS      SDA(SS)      10            53        D10        10               10
 * SPI MOSI    MOSI         11 / ICSP-4   51        D11        ICSP-4           16
 * SPI MISO    MISO         12 / ICSP-1   50        D12        ICSP-1           14
 * SPI SCK     SCK          13 / ICSP-3   52        D13        ICSP-3           15
 */

#include <SPI.h>
#include <MFRC522.h>

#define RST_PIN         9          // Configurable, see typical pin layout above
#define SS_PIN          10         // Configurable, see typical pin layout above

MFRC522 mfrc522(SS_PIN, RST_PIN);  // Create MFRC522 instance

void setup() {
    Serial.begin(9600);     // Initialize serial communications with the PC
    while (!Serial);        // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
    SPI.begin();            // Init SPI bus
    mfrc522.PCD_Init();     // Init MFRC522
    mfrc522.PCD_DumpVersionToSerial();  // Show details of PCD - MFRC522 Card Reader details
    Serial.println(F("Scan PICC to see UID, SAK, type, and data blocks..."));
}

void loop() {
    // Look for new cards
    if ( ! mfrc522.PICC_IsNewCardPresent()) {
        return;
    }

    // Select one of the cards
    if ( ! mfrc522.PICC_ReadCardSerial()) {
        return;
    }

    // Dump debug info about the card; PICC_HaltA() is automatically called
    mfrc522.PICC_DumpToSerial(&(mfrc522.uid));
}

当我执行它时，我收到消息：

固件版本：0x0 =（未知）

警告：通信失败，MFRC522是否已正确连接？

扫描PICC以查看UID，SAK，类型和数据块...

我已经重新检查了连接一千次，但它没有工作，引脚连接如示例所示，并且LED D1亮（红色）。有人可以帮助我吗？

Answer 1

如果有人在寻找解决方案......

步骤1：如果您使用Arduino Uno或在Arduino Mega中使用RST引脚9，请将RST引脚更改为5。其他引脚保持不变。
第2步：下载AddicoreRFID库。
步骤3：打开Arduino IDE并导航到Sketch＆gt;使用“添加.ZIP库...”选项包括库步骤4：重新启动Arduino IDE（关闭并再次打开）
步骤5：在Arduino IDE内部导航到文件＆gt;例子＆gt; AddicoreRFID。选择“Addicore_RFID_Example”草图并上传草图
步骤6：打开串行窗口并选择“Both NL＆amp; CR”并选择“9600”作为波特率选项

详情说明可在link

找到

Answer 2

此问题是由于接线不正确或与RFID传感器的接触不良所致。您需要焊接以获取结果。

另外，为您的Arduino板选择合适的PINS。

Answer 3

*试用此代码*

 #include <RFID.h>

/*
* Pin layout should be as follows (on Arduino Uno):
* MOSI: Pin 11 / ICSP-4
* MISO: Pin 12 / ICSP-1
* SCK: Pin 13 / ISCP-3
* SS/SDA: Pin 10
* RST: Pin 9
*/

#include <SPI.h>
#include <RFID.h>

#define SS_PIN 10
#define RST_PIN 9

RFID rfid(SS_PIN,RST_PIN);


int self = 7;
int bat = 8; 
int s = 6;

int serNum[5];
int cards[][5] = {
  {42,249,70,213,64}

};

bool access = false;

void setup(){

    Serial.begin(9600);
    SPI.begin();
    rfid.init();

    pinMode(self, OUTPUT);
    pinMode(bat ,OUTPUT);
    pinMode(s,OUTPUT);


    digitalWrite(self, LOW);
    digitalWrite(bat , LOW);

}

void loop(){

    if(rfid.isCard()){

        if(rfid.readCardSerial()){
            Serial.print(rfid.serNum[0]);
            Serial.print(" ");
            Serial.print(rfid.serNum[1]);
            Serial.print(" ");
            Serial.print(rfid.serNum[2]);
            Serial.print(" ");
            Serial.print(rfid.serNum[3]);
            Serial.print(" ");
            Serial.print(rfid.serNum[4]);
            Serial.println("");

            for(int x = 0; x < sizeof(cards); x++){
              for(int i = 0; i < sizeof(rfid.serNum); i++ ){
                  if(rfid.serNum[i] != cards[x][i]) {
                      access = false;
                      break;
                  } else {
                      access = true;
                  }
              }
              if(access) break;
            }

        }

       if(access){
          Serial.println("Welcome!");
          digitalWrite(bat,HIGH);
          digitalWrite(self,HIGH);
          delay(1000);
          digitalWrite(self,LOW);

      } else {
           Serial.println("Not allowed!");
          digitalWrite(s,HIGH);
          delay(2000);
          digitalWrite(s,LOW); 
          digitalWrite(bat,LOW);

       }        
    }



    rfid.halt();`enter code here`

}

RFID-RC522不读卡

3 个答案: