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// include libraries
#include <SPI.h>
#include <MFRC522.h>
// define pins
# define RST_PIN 9
#define SS_1_PIN 10 // Configurable, take a unused pin, only HIGH/LOW required, must be diffrent to SS 2
// #define SS_2_PIN 8 // Configurable, take a unused pin, only HIGH/LOW required, must be diffrent to SS 1
#define NR_OF_READERS 1 // ** change to 2 when I add the toher reader and uncomment SS_2 **
// setup MFRC522 instance
byte ssPins[] = {SS_1_PIN}; // ** when 2 readers change to = {SS_1_PIN, SS_2_PIN} **
MFRC522 mfrc522[NR_OF_READERS]; // Create MFRC522 instance
void setup() {
// begin communications
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(); // initiate SPI bus
// setup response (serial prints the connected readers & versions)
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();
}
}
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
}
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);
}
}