單晶片討論區

續上篇電梯卡之複製(讀卡篇)，今天我要來將所紀錄的NUID卡號寫入新卡中，

完成複製。

首先，多準備一張CUID卡

然後利用以下程式寫入新的卡片中。

記得要先將程式中的NUID卡號改成自己要複製的卡片的卡號。

所需材料：ESP32 *1、RFID-RC522 *1、CUID卡 *1、杜邦線 *少許
電路圖：

程式列表：

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

#define RST_PIN   14     // Configurable, see typical pin layout above
#define SS_PIN    21    // Configurable, see typical pin layout above

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

/* 你所紀錄的卡片寫在這裡 */
#define NEW_UID {0xDE, 0xAD, 0xBE, 0xEF}

MFRC522::MIFARE_Key key;

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 card
  Serial.println(F("警告: 這程式將會覆蓋你原有的卡號，請小心使用！"));
  
  // Prepare key - all keys are set to FFFFFFFFFFFFh at chip delivery from the factory.
  for (byte i = 0; i < 6; i++) {
    key.keyByte[i] = 0xFF;
  }
}
void loop() {
  
  // Reset the loop if no new card present on the sensor/reader. This saves the entire process when idle. And if present, select one.
  if ( ! mfrc522.PICC_IsNewCardPresent() || ! mfrc522.PICC_ReadCardSerial() ) {
    delay(50);
    return;
  }
  
  // Now a card is selected. The UID and SAK is in mfrc522.uid.
  
  // Dump UID
  Serial.print(F("卡片 UID:"));
  for (byte i = 0; i < mfrc522.uid.size; i++) {
    Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
    Serial.print(mfrc522.uid.uidByte[i], HEX);
  } 
  Serial.println();

  // Set new UID
  byte newUid[] = NEW_UID;
  if ( mfrc522.MIFARE_SetUid(newUid, (byte)4, true) ) {
    Serial.println(F("新卡號已經寫入新卡中了."));
  }
  
  // Halt PICC and re-select it so DumpToSerial doesn't get confused
  mfrc522.PICC_HaltA();
  if ( ! mfrc522.PICC_IsNewCardPresent() || ! mfrc522.PICC_ReadCardSerial() ) {
    return;
  }
  
  // Dump the new memory contents
  Serial.println(F("新卡號及內容："));
  mfrc522.PICC_DumpToSerial(&(mfrc522.uid));
  
  delay(2000);
}

單晶片討論區

電梯卡之複製(寫卡篇)

電梯卡之複製(寫卡篇)