89 lines
3.5 KiB
C++
89 lines
3.5 KiB
C++
/*
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* --------------------------------------------------------------------------------------------------------------------
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* Example to change UID of changeable MIFARE card.
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* --------------------------------------------------------------------------------------------------------------------
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* This is a MFRC522 library example; for further details and other examples see: https://github.com/OSSLibraries/Arduino_MFRC522v2
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*
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* This sample shows how to set the UID on a UID changeable MIFARE card.
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*
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* @author Tom Clement
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* @license Released into the public domain.
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*
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* Typical pin layout used:
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* -----------------------------------------------------------------------------------------
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* MFRC522 Arduino Arduino Arduino Arduino Arduino
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* Reader/PCD Uno/101 Mega Nano v3 Leonardo/Micro Pro Micro
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* Signal Pin Pin Pin Pin Pin Pin
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* -----------------------------------------------------------------------------------------
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* SPI SS SDA(SS) 10 53 D10 10 10
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* SPI MOSI MOSI 11 / ICSP-4 51 D11 ICSP-4 16
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* SPI MISO MISO 12 / ICSP-1 50 D12 ICSP-1 14
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* SPI SCK SCK 13 / ICSP-3 52 D13 ICSP-3 15
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*
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* Not found? For more see: https://github.com/OSSLibraries/Arduino_MFRC522v2#pin-layout
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*/
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#include <MFRC522v2.h>
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#include <MFRC522DriverSPI.h>
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//#include <MFRC522DriverI2C.h>
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#include <MFRC522DriverPinSimple.h>
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#include <MFRC522Debug.h>
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#include <MFRC522Hack.h>
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MFRC522DriverPinSimple ss_pin(10); // Configurable, see typical pin layout above.
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MFRC522DriverSPI driver(ss_pin);
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//MFRC522DriverI2C driver();
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MFRC522 mfrc522(driver); // Create MFRC522 instance.
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MFRC522Hack mfrc522Hack(mfrc522, true); // Create MFRC522Hack instance.
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/* Set your new UID here! */
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constexpr uint8_t newUid[] = {0xDE, 0xAD, 0xBE, 0xEF};
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MFRC522::MIFARE_Key key;
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void setup() {
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Serial.begin(115200); // Initialize serial communications with the PC for debugging.
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while (!Serial); // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4).
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mfrc522.PCD_Init(); // Init MFRC522 board.
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Serial.println(F("Warning: this example overwrites the UID of your UID changeable card, use with care!"));
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Serial.println(F("This example only works with MIFARE Classic cards."));
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// Prepare key - all keys are set to FFFFFFFFFFFFh at chip delivery from the factory.
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for (byte i = 0; i < 6; i++) {
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key.keyByte[i] = 0xFF;
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}
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}
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void loop() {
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// Reset the loop if no new card present on the sensor/reader. This saves the entire process when idle. And if present, select one.
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if ( !mfrc522.PICC_IsNewCardPresent() || !mfrc522.PICC_ReadCardSerial() ) {
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delay(50);
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return;
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}
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// Now a card is selected. The UID and SAK is in mfrc522.uid.
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// Dump UID.
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Serial.print(F("Card UID:"));
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MFRC522Debug::PrintSelectedUID(mfrc522, Serial);
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Serial.println();
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// Set new UID.
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if ( mfrc522Hack.MIFARE_SetUid(newUid, (byte)4, key, true) ) {
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Serial.println(F("Wrote new UID to card."));
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}
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// Halt PICC and re-select it so DumpToSerial doesn't get confused.
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mfrc522.PICC_HaltA();
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if ( !mfrc522.PICC_IsNewCardPresent() || !mfrc522.PICC_ReadCardSerial() ) {
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return;
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}
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// Dump the new memory contents.
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Serial.println(F("New UID and contents:"));
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MFRC522Debug::PICC_DumpToSerial(mfrc522, Serial, &(mfrc522.uid));
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delay(2000);
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}
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