libs/RFID.MFRC522
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Merge branch 'master' into upd-readme

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This commit is contained in:
Rotzbua
2016-01-04 04:58:20 +01:00
parent 620453b6ca bafa2faead
commit 51a38a04de
10 changed files with 85 additions and 78 deletions
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14
MFRC522.cpp
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@@ -293,7 +293,7 @@ void MFRC522::PCD_SetAntennaGain(byte mask) {
* Performs a self-test of the MFRC522 * Performs a self-test of the MFRC522
* See 16.1.1 in http://www.nxp.com/documents/data_sheet/MFRC522.pdf * See 16.1.1 in http://www.nxp.com/documents/data_sheet/MFRC522.pdf
* *
* @return Whether or not the test passed. * @return Whether or not the test passed. Or false if no firmware reference is available.
*/ */
bool MFRC522::PCD_PerformSelfTest() { bool MFRC522::PCD_PerformSelfTest() {
// This follows directly the steps outlined in 16.1.1 // This follows directly the steps outlined in 16.1.1
@@ -353,7 +353,7 @@ bool MFRC522::PCD_PerformSelfTest() {
reference = MFRC522_firmware_referenceV2_0; reference = MFRC522_firmware_referenceV2_0;
break; break;
default: // Unknown version default: // Unknown version
return false; return false; // abort test
} }
// Verify that the results match up to our expectations // Verify that the results match up to our expectations
@@ -1257,7 +1257,7 @@ MFRC522::PICC_Type MFRC522::PICC_GetType(byte sak ///< The SAK byte returned fr
* *
* @return const __FlashStringHelper * * @return const __FlashStringHelper *
*/ */
const __FlashStringHelper *MFRC522::PICC_GetTypeName(byte piccType ///< One of the PICC_Type enums. const __FlashStringHelper *MFRC522::PICC_GetTypeName(PICC_Type piccType ///< One of the PICC_Type enums.
) { ) {
switch (piccType) { switch (piccType) {
case PICC_TYPE_ISO_14443_4: return F("PICC compliant with ISO/IEC 14443-4"); case PICC_TYPE_ISO_14443_4: return F("PICC compliant with ISO/IEC 14443-4");
@@ -1295,7 +1295,7 @@ void MFRC522::PICC_DumpToSerial(Uid *uid ///< Pointer to Uid struct returned fro
Serial.println(); Serial.println();
// PICC type // PICC type
byte piccType = PICC_GetType(uid->sak); PICC_Type piccType = PICC_GetType(uid->sak);
Serial.print(F("PICC type: ")); Serial.print(F("PICC type: "));
Serial.println(PICC_GetTypeName(piccType)); Serial.println(PICC_GetTypeName(piccType));
@@ -1337,7 +1337,7 @@ void MFRC522::PICC_DumpToSerial(Uid *uid ///< Pointer to Uid struct returned fro
* On success the PICC is halted after dumping the data. * On success the PICC is halted after dumping the data.
*/ */
void MFRC522::PICC_DumpMifareClassicToSerial( Uid *uid, ///< Pointer to Uid struct returned from a successful PICC_Select(). void MFRC522::PICC_DumpMifareClassicToSerial( Uid *uid, ///< Pointer to Uid struct returned from a successful PICC_Select().
byte piccType, ///< One of the PICC_Type enums. PICC_Type piccType, ///< One of the PICC_Type enums.
MIFARE_Key *key ///< Key A used for all sectors. MIFARE_Key *key ///< Key A used for all sectors.
) { ) {
byte no_of_sectors = 0; byte no_of_sectors = 0;
@@ -1795,7 +1795,7 @@ bool MFRC522::MIFARE_UnbrickUidSector(bool logErrors) {
bool MFRC522::PICC_IsNewCardPresent() { bool MFRC522::PICC_IsNewCardPresent() {
byte bufferATQA[2]; byte bufferATQA[2];
byte bufferSize = sizeof(bufferATQA); byte bufferSize = sizeof(bufferATQA);
byte result = PICC_RequestA(bufferATQA, &bufferSize); MFRC522::StatusCode result = PICC_RequestA(bufferATQA, &bufferSize);
return (result == STATUS_OK || result == STATUS_COLLISION); return (result == STATUS_OK || result == STATUS_COLLISION);
} // End PICC_IsNewCardPresent() } // End PICC_IsNewCardPresent()
@@ -1808,6 +1808,6 @@ bool MFRC522::PICC_IsNewCardPresent() {
* @return bool * @return bool
*/ */
bool MFRC522::PICC_ReadCardSerial() { bool MFRC522::PICC_ReadCardSerial() {
byte result = PICC_Select(&uid); MFRC522::StatusCode result = PICC_Select(&uid);
return (result == STATUS_OK); return (result == STATUS_OK);
} // End } // End

88
MFRC522.h
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@@ -272,30 +272,32 @@ public:
}; };
// PICC types we can detect. Remember to update PICC_GetTypeName() if you add more. // PICC types we can detect. Remember to update PICC_GetTypeName() if you add more.
// last value set to 255, hints compiler to use byte instead of default integer, works for arduino ide to save ram and flash
enum PICC_Type { enum PICC_Type {
PICC_TYPE_UNKNOWN = 0, PICC_TYPE_UNKNOWN ,
PICC_TYPE_ISO_14443_4 = 1, // PICC compliant with ISO/IEC 14443-4 PICC_TYPE_ISO_14443_4 , // PICC compliant with ISO/IEC 14443-4
PICC_TYPE_ISO_18092 = 2, // PICC compliant with ISO/IEC 18092 (NFC) PICC_TYPE_ISO_18092 , // PICC compliant with ISO/IEC 18092 (NFC)
PICC_TYPE_MIFARE_MINI = 3, // MIFARE Classic protocol, 320 bytes PICC_TYPE_MIFARE_MINI , // MIFARE Classic protocol, 320 bytes
PICC_TYPE_MIFARE_1K = 4, // MIFARE Classic protocol, 1KB PICC_TYPE_MIFARE_1K , // MIFARE Classic protocol, 1KB
PICC_TYPE_MIFARE_4K = 5, // MIFARE Classic protocol, 4KB PICC_TYPE_MIFARE_4K , // MIFARE Classic protocol, 4KB
PICC_TYPE_MIFARE_UL = 6, // MIFARE Ultralight or Ultralight C PICC_TYPE_MIFARE_UL , // MIFARE Ultralight or Ultralight C
PICC_TYPE_MIFARE_PLUS = 7, // MIFARE Plus PICC_TYPE_MIFARE_PLUS , // MIFARE Plus
PICC_TYPE_TNP3XXX = 8, // Only mentioned in NXP AN 10833 MIFARE Type Identification Procedure PICC_TYPE_TNP3XXX , // Only mentioned in NXP AN 10833 MIFARE Type Identification Procedure
PICC_TYPE_NOT_COMPLETE = 255 // SAK indicates UID is not complete. PICC_TYPE_NOT_COMPLETE = 255 // SAK indicates UID is not complete.
}; };
// Return codes from the functions in this class. Remember to update GetStatusCodeName() if you add more. // Return codes from the functions in this class. Remember to update GetStatusCodeName() if you add more.
// last value set to 255, hints compiler to use byte instead of default integer, works for arduino ide to save ram and flash
enum StatusCode { enum StatusCode {
STATUS_OK = 1, // Success STATUS_OK , // Success
STATUS_ERROR = 2, // Error in communication STATUS_ERROR , // Error in communication
STATUS_COLLISION = 3, // Collission detected STATUS_COLLISION , // Collission detected
STATUS_TIMEOUT = 4, // Timeout in communication. STATUS_TIMEOUT , // Timeout in communication.
STATUS_NO_ROOM = 5, // A buffer is not big enough. STATUS_NO_ROOM , // A buffer is not big enough.
STATUS_INTERNAL_ERROR = 6, // Internal error in the code. Should not happen ;-) STATUS_INTERNAL_ERROR , // Internal error in the code. Should not happen ;-)
STATUS_INVALID = 7, // Invalid argument. STATUS_INVALID , // Invalid argument.
STATUS_CRC_WRONG = 8, // The CRC_A does not match STATUS_CRC_WRONG , // The CRC_A does not match
STATUS_MIFARE_NACK = 9 // A MIFARE PICC responded with NAK. STATUS_MIFARE_NACK = 255 // A MIFARE PICC responded with NAK.
}; };
// A struct used for passing the UID of a PICC. // A struct used for passing the UID of a PICC.
@@ -333,7 +335,7 @@ public:
void setBitMask(unsigned char reg, unsigned char mask); void setBitMask(unsigned char reg, unsigned char mask);
void PCD_SetRegisterBitMask(byte reg, byte mask); void PCD_SetRegisterBitMask(byte reg, byte mask);
void PCD_ClearRegisterBitMask(byte reg, byte mask); void PCD_ClearRegisterBitMask(byte reg, byte mask);
MFRC522::StatusCode PCD_CalculateCRC(byte *data, byte length, byte *result); StatusCode PCD_CalculateCRC(byte *data, byte length, byte *result);
///////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////
// Functions for manipulating the MFRC522 // Functions for manipulating the MFRC522
@@ -350,43 +352,43 @@ public:
///////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////
// Functions for communicating with PICCs // Functions for communicating with PICCs
///////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////
MFRC522::StatusCode PCD_TransceiveData(byte *sendData, byte sendLen, byte *backData, byte *backLen, byte *validBits = NULL, byte rxAlign = 0, bool checkCRC = false); StatusCode PCD_TransceiveData(byte *sendData, byte sendLen, byte *backData, byte *backLen, byte *validBits = NULL, byte rxAlign = 0, bool checkCRC = false);
MFRC522::StatusCode PCD_CommunicateWithPICC(byte command, byte waitIRq, byte *sendData, byte sendLen, byte *backData = NULL, byte *backLen = NULL, byte *validBits = NULL, byte rxAlign = 0, bool checkCRC = false); StatusCode PCD_CommunicateWithPICC(byte command, byte waitIRq, byte *sendData, byte sendLen, byte *backData = NULL, byte *backLen = NULL, byte *validBits = NULL, byte rxAlign = 0, bool checkCRC = false);
MFRC522::StatusCode PICC_RequestA(byte *bufferATQA, byte *bufferSize); StatusCode PICC_RequestA(byte *bufferATQA, byte *bufferSize);
MFRC522::StatusCode PICC_WakeupA(byte *bufferATQA, byte *bufferSize); StatusCode PICC_WakeupA(byte *bufferATQA, byte *bufferSize);
MFRC522::StatusCode PICC_REQA_or_WUPA(byte command, byte *bufferATQA, byte *bufferSize); StatusCode PICC_REQA_or_WUPA(byte command, byte *bufferATQA, byte *bufferSize);
MFRC522::StatusCode PICC_Select(Uid *uid, byte validBits = 0); StatusCode PICC_Select(Uid *uid, byte validBits = 0);
MFRC522::StatusCode PICC_HaltA(); StatusCode PICC_HaltA();
///////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////
// Functions for communicating with MIFARE PICCs // Functions for communicating with MIFARE PICCs
///////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////
MFRC522::StatusCode PCD_Authenticate(byte command, byte blockAddr, MIFARE_Key *key, Uid *uid); StatusCode PCD_Authenticate(byte command, byte blockAddr, MIFARE_Key *key, Uid *uid);
void PCD_StopCrypto1(); void PCD_StopCrypto1();
MFRC522::StatusCode MIFARE_Read(byte blockAddr, byte *buffer, byte *bufferSize); StatusCode MIFARE_Read(byte blockAddr, byte *buffer, byte *bufferSize);
MFRC522::StatusCode MIFARE_Write(byte blockAddr, byte *buffer, byte bufferSize); StatusCode MIFARE_Write(byte blockAddr, byte *buffer, byte bufferSize);
MFRC522::StatusCode MIFARE_Ultralight_Write(byte page, byte *buffer, byte bufferSize); StatusCode MIFARE_Ultralight_Write(byte page, byte *buffer, byte bufferSize);
MFRC522::StatusCode MIFARE_Decrement(byte blockAddr, long delta); StatusCode MIFARE_Decrement(byte blockAddr, long delta);
MFRC522::StatusCode MIFARE_Increment(byte blockAddr, long delta); StatusCode MIFARE_Increment(byte blockAddr, long delta);
MFRC522::StatusCode MIFARE_Restore(byte blockAddr); StatusCode MIFARE_Restore(byte blockAddr);
MFRC522::StatusCode MIFARE_Transfer(byte blockAddr); StatusCode MIFARE_Transfer(byte blockAddr);
MFRC522::StatusCode MIFARE_GetValue(byte blockAddr, long *value); StatusCode MIFARE_GetValue(byte blockAddr, long *value);
MFRC522::StatusCode MIFARE_SetValue(byte blockAddr, long value); StatusCode MIFARE_SetValue(byte blockAddr, long value);
MFRC522::StatusCode PCD_NTAG216_AUTH(byte *passWord, byte pACK[]); StatusCode PCD_NTAG216_AUTH(byte *passWord, byte pACK[]);
///////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////
// Support functions // Support functions
///////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////
MFRC522::StatusCode PCD_MIFARE_Transceive(byte *sendData, byte sendLen, bool acceptTimeout = false); StatusCode PCD_MIFARE_Transceive(byte *sendData, byte sendLen, bool acceptTimeout = false);
// old function used too much memory, now name moved to flash; if you need char, copy from flash to memory // old function used too much memory, now name moved to flash; if you need char, copy from flash to memory
//const char *GetStatusCodeName(byte code); //const char *GetStatusCodeName(byte code);
const __FlashStringHelper *GetStatusCodeName(MFRC522::StatusCode code); const __FlashStringHelper *GetStatusCodeName(StatusCode code);
MFRC522::PICC_Type PICC_GetType(byte sak); PICC_Type PICC_GetType(byte sak);
// old function used too much memory, now name moved to flash; if you need char, copy from flash to memory // old function used too much memory, now name moved to flash; if you need char, copy from flash to memory
//const char *PICC_GetTypeName(byte type); //const char *PICC_GetTypeName(byte type);
const __FlashStringHelper *PICC_GetTypeName(byte type); const __FlashStringHelper *PICC_GetTypeName(PICC_Type type);
void PICC_DumpToSerial(Uid *uid); void PICC_DumpToSerial(Uid *uid);
void PICC_DumpMifareClassicToSerial(Uid *uid, byte piccType, MIFARE_Key *key); void PICC_DumpMifareClassicToSerial(Uid *uid, PICC_Type piccType, MIFARE_Key *key);
void PICC_DumpMifareClassicSectorToSerial(Uid *uid, MIFARE_Key *key, byte sector); void PICC_DumpMifareClassicSectorToSerial(Uid *uid, MIFARE_Key *key, byte sector);
void PICC_DumpMifareUltralightToSerial(); void PICC_DumpMifareUltralightToSerial();
void MIFARE_SetAccessBits(byte *accessBitBuffer, byte g0, byte g1, byte g2, byte g3); void MIFARE_SetAccessBits(byte *accessBitBuffer, byte g0, byte g1, byte g2, byte g3);
@@ -403,7 +405,7 @@ public:
private: private:
byte _chipSelectPin; // Arduino pin connected to MFRC522's SPI slave select input (Pin 24, NSS, active low) byte _chipSelectPin; // Arduino pin connected to MFRC522's SPI slave select input (Pin 24, NSS, active low)
byte _resetPowerDownPin; // Arduino pin connected to MFRC522's reset and power down input (Pin 6, NRSTPD, active low) byte _resetPowerDownPin; // Arduino pin connected to MFRC522's reset and power down input (Pin 6, NRSTPD, active low)
MFRC522::StatusCode MIFARE_TwoStepHelper(byte command, byte blockAddr, long data); StatusCode MIFARE_TwoStepHelper(byte command, byte blockAddr, long data);
}; };
#endif #endif

3
changes.txt
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@@ -6,7 +6,8 @@
5 Dec 2015 5 Dec 2015
- recognize infineon cards correctly @mayatforest - recognize infineon cards correctly @mayatforest
- added multi reader support, see example @lmmeng - added multi reader support, see example @lmmeng
- functions return MFRC522::StatusCode instead of generic byte @rotzbua - functions return MFRC522::StatusCode and MFRC522::PICC_Type instead of generic byte @rotzbua
- removed int-values of MFRC522::StatusCode and MFRC522::PICC_Type @rotzbua
10 Nov 2014 10 Nov 2014
- Updated the changelog. - Updated the changelog.

2
examples/ChangeUID/ChangeUID.ino
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@@ -91,7 +91,7 @@ void loop() {
Serial.println(); Serial.println();
// Dump PICC type // Dump PICC type
// byte piccType = mfrc522.PICC_GetType(mfrc522.uid.sak); // MFRC522::PICC_Type piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
// Serial.print(F("PICC type: ")); // Serial.print(F("PICC type: "));
// Serial.print(mfrc522.PICC_GetTypeName(piccType)); // Serial.print(mfrc522.PICC_GetTypeName(piccType));
// Serial.print(F(" (SAK ")); // Serial.print(F(" (SAK "));

2
examples/MifareClassicValueBlock/MifareClassicValueBlock.ino
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@@ -78,7 +78,7 @@ void loop() {
dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size); dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size);
Serial.println(); Serial.println();
Serial.print(F("PICC type: ")); Serial.print(F("PICC type: "));
byte piccType = mfrc522.PICC_GetType(mfrc522.uid.sak); MFRC522::PICC_Type piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
Serial.println(mfrc522.PICC_GetTypeName(piccType)); Serial.println(mfrc522.PICC_GetTypeName(piccType));
// Check for compatibility // Check for compatibility

2
examples/ReadAndWrite/ReadAndWrite.ino
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@@ -77,7 +77,7 @@ void loop() {
dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size); dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size);
Serial.println(); Serial.println();
Serial.print(F("PICC type: ")); Serial.print(F("PICC type: "));
byte piccType = mfrc522.PICC_GetType(mfrc522.uid.sak); MFRC522::PICC_Type piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
Serial.println(mfrc522.PICC_GetTypeName(piccType)); Serial.println(mfrc522.PICC_GetTypeName(piccType));
// Check for compatibility // Check for compatibility

2
examples/ReadUidMultiReader/ReadUidMultiReader.ino
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@@ -72,7 +72,7 @@ void loop() {
dump_byte_array(mfrc522[reader].uid.uidByte, mfrc522[reader].uid.size); dump_byte_array(mfrc522[reader].uid.uidByte, mfrc522[reader].uid.size);
Serial.println(); Serial.println();
Serial.print(F("PICC type: ")); Serial.print(F("PICC type: "));
byte piccType = mfrc522[reader].PICC_GetType(mfrc522[reader].uid.sak); MFRC522::PICC_Type piccType = mfrc522[reader].PICC_GetType(mfrc522[reader].uid.sak);
Serial.println(mfrc522[reader].PICC_GetTypeName(piccType)); Serial.println(mfrc522[reader].PICC_GetTypeName(piccType));
// Halt PICC // Halt PICC

42
examples/firmware_check/firmware_check.ino
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@@ -1,12 +1,13 @@
/* /*
* ---------------------------------------------------------------------------- * --------------------------------------------------------------------------------------------------------------------
* Example sketch/program to test your firmware. * Example sketch/program to test your firmware.
* ---------------------------------------------------------------------------- * --------------------------------------------------------------------------------------------------------------------
* This is a MFRC522 library example; see https://github.com/miguelbalboa/rfid * This is a MFRC522 library example; for further details and other examples see: https://github.com/miguelbalboa/rfid
* for further details and other examples.
* *
* NOTE: The library file MFRC522.h has a lot of useful info. The functions are * This example test the firmware of your MFRC522 reader module, only known version can be checked. If the test passed
* documented in MFRC522.cpp. Please read it. * it do not mean that your module is faultless! Some modules have bad or broken antennas or the PICC is broken.
*
* NOTE: for more informations read the README.rst
* *
* Released into the public domain. * Released into the public domain.
* *
@@ -31,8 +32,11 @@
#define RST_PIN 9 // Configurable, see typical pin layout above #define RST_PIN 9 // Configurable, see typical pin layout above
#define SS_PIN 10 // 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. MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance
/**
* Check firmware only once at startup
*/
void setup() { void setup() {
Serial.begin(9600); // Initialize serial communications with the PC 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) while (!Serial); // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
@@ -43,8 +47,11 @@ void setup() {
Serial.println(F("MFRC522 Digital self test")); Serial.println(F("MFRC522 Digital self test"));
Serial.println(F("*****************************")); Serial.println(F("*****************************"));
ShowReaderVersion(); // Show version of PCD - MFRC522 Card Reader ShowReaderVersion(); // Show version of PCD - MFRC522 Card Reader
Serial.println(F("-----------------------------"));
Serial.println(F("Only known versions supported"));
Serial.println(F("-----------------------------"));
Serial.println(F("Performing test...")); Serial.println(F("Performing test..."));
bool result = mfrc522.PCD_PerformSelfTest(); bool result = mfrc522.PCD_PerformSelfTest(); // perform the test
Serial.println(F("-----------------------------")); Serial.println(F("-----------------------------"));
Serial.print(F("Result: ")); Serial.print(F("Result: "));
if (result) if (result)
@@ -64,17 +71,14 @@ void ShowReaderVersion() {
byte v = mfrc522.PCD_ReadRegister(mfrc522.VersionReg); byte v = mfrc522.PCD_ReadRegister(mfrc522.VersionReg);
Serial.print(F("Firmware Version: 0x")); Serial.print(F("Firmware Version: 0x"));
Serial.print(v, HEX); Serial.print(v, HEX);
if (v == 0x88) // Lookup which version
Serial.print(F(" = (clone)")); switch(v) {
else if (v == 0x90) case 0x88: Serial.println(F(" = (clone)")); break;
Serial.print(F(" = v0.0")); case 0x90: Serial.println(F(" = v0.0")); break;
else if (v == 0x91) case 0x91: Serial.println(F(" = v1.0")); break;
Serial.print(F(" = v1.0")); case 0x92: Serial.println(F(" = v2.0")); break;
else if (v == 0x92) default: Serial.println(F(" = (unknown)"));
Serial.print(F(" = v2.0")); }
else
Serial.print(F(" = (unknown)"));
Serial.println();
// When 0x00 or 0xFF is returned, communication probably failed // When 0x00 or 0xFF is returned, communication probably failed
if ((v == 0x00) || (v == 0xFF)) if ((v == 0x00) || (v == 0xFF))
Serial.println(F("WARNING: Communication failure, is the MFRC522 properly connected?")); Serial.println(F("WARNING: Communication failure, is the MFRC522 properly connected?"));

2
examples/rfid_default_keys/rfid_default_keys.ino
View File

@@ -132,7 +132,7 @@ void loop() {
dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size); dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size);
Serial.println(); Serial.println();
Serial.print(F("PICC type: ")); Serial.print(F("PICC type: "));
byte piccType = mfrc522.PICC_GetType(mfrc522.uid.sak); MFRC522::PICC_Type piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
Serial.println(mfrc522.PICC_GetTypeName(piccType)); Serial.println(mfrc522.PICC_GetTypeName(piccType));
// Try the known default keys // Try the known default keys

2
examples/rfid_write_personal_data/rfid_write_personal_data.ino
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@@ -53,7 +53,7 @@ void loop() {
Serial.print(mfrc522.uid.uidByte[i], HEX); Serial.print(mfrc522.uid.uidByte[i], HEX);
} }
Serial.print(F(" PICC type: ")); // Dump PICC type Serial.print(F(" PICC type: ")); // Dump PICC type
byte piccType = mfrc522.PICC_GetType(mfrc522.uid.sak); MFRC522::PICC_Type piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
Serial.println(mfrc522.PICC_GetTypeName(piccType)); Serial.println(mfrc522.PICC_GetTypeName(piccType));
byte buffer[34]; byte buffer[34];