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- /**
- * --------------------------------------------------------------------------------------------------------------------
- * Example sketch/program showing how to read data from more than one 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 more than one PICC (that is: a RFID Tag or Card) using a
- * MFRC522 based RFID Reader on the Arduino SPI interface.
- *
- * Warning: This may not work! Multiple devices at one SPI are difficult and cause many trouble!! Engineering skill
- * and knowledge are required!
- *
- * @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 1 SDA(SS) ** custom, take a unused pin, only HIGH/LOW required **
- * SPI SS 2 SDA(SS) ** custom, take a unused pin, only HIGH/LOW required **
- * 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>
-
- constexpr uint8_t RST_PIN = 9; // Configurable, see typical pin layout above
- constexpr uint8_t SS_1_PIN = 10; // Configurable, take a unused pin, only HIGH/LOW required, must be diffrent to SS 2
- constexpr uint8_t SS_2_PIN = 8; // Configurable, take a unused pin, only HIGH/LOW required, must be diffrent to SS 1
-
- constexpr uint8_t NR_OF_READERS = 2;
-
- byte ssPins[] = {SS_1_PIN, SS_2_PIN};
-
- MFRC522 mfrc522[NR_OF_READERS]; // Create MFRC522 instance.
-
- /**
- * Initialize.
- */
- 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
-
- for (uint8_t reader = 0; reader < NR_OF_READERS; reader++) {
- mfrc522[reader].PCD_Init(ssPins[reader], RST_PIN); // Init each MFRC522 card
- Serial.print(F("Reader "));
- Serial.print(reader);
- Serial.print(F(": "));
- mfrc522[reader].PCD_DumpVersionToSerial();
- }
- }
-
- /**
- * Main loop.
- */
- void loop() {
-
- for (uint8_t reader = 0; reader < NR_OF_READERS; reader++) {
- // Look for new cards
-
- if (mfrc522[reader].PICC_IsNewCardPresent() && mfrc522[reader].PICC_ReadCardSerial()) {
- Serial.print(F("Reader "));
- Serial.print(reader);
- // Show some details of the PICC (that is: the tag/card)
- Serial.print(F(": Card UID:"));
- dump_byte_array(mfrc522[reader].uid.uidByte, mfrc522[reader].uid.size);
- Serial.println();
- Serial.print(F("PICC type: "));
- MFRC522::PICC_Type piccType = mfrc522[reader].PICC_GetType(mfrc522[reader].uid.sak);
- Serial.println(mfrc522[reader].PICC_GetTypeName(piccType));
-
- // Halt PICC
- mfrc522[reader].PICC_HaltA();
- // Stop encryption on PCD
- mfrc522[reader].PCD_StopCrypto1();
- } //if (mfrc522[reader].PICC_IsNewC
- } //for(uint8_t reader
- }
-
- /**
- * Helper routine to dump a byte array as hex values to Serial.
- */
- void dump_byte_array(byte *buffer, byte bufferSize) {
- for (byte i = 0; i < bufferSize; i++) {
- Serial.print(buffer[i] < 0x10 ? " 0" : " ");
- Serial.print(buffer[i], HEX);
- }
- }
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