#include <uFR.h>

uFR reader(10, 11, 12);  // rx, tx, reset

#define DEBUG_CODE

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(9600);
  delay(1000);

  reader.begin();
  delay(3000);  // Required!
  uint8_t type[4];
  uint8_t serialnumber[4];

  Serial.print("Type: ");
  Serial.print(reader.getReaderType(type), HEX);
  for (int i = 0; i < 4; i++) {
    Serial.print(type[i], HEX);
  }
  Serial.println("");
  Serial.print("Serial number [DEC] : ");
  Serial.print(reader.getReaderSerial(serialnumber), DEC);
  for (int i = 0; i < 4; i++) {
    Serial.print(serialnumber[i], DEC);
  }
  Serial.println("");
  delay(3000);
  Serial.println("Waiting for card");
}

void loop() {
  uint8_t cardID[10];
  uint8_t length = 0;
  uint8_t chiptype = 0;
  uint8_t code;

  code = reader.getCardID(cardID, &length, &chiptype);

  if (code == 0) {
    Serial.print("Card found! UID:");
    for (int i = 0; i < length; i++) {
      //show leading zero for 0x00 to 0x0F
      if (cardID[i] < 16)
        Serial.print("0");
      Serial.print(cardID[i], HEX);
    }
    Serial.println("");

    Serial.print("Length [HEX]: ");
    Serial.print("0x");
    Serial.print(length, HEX);
    Serial.println();

    Serial.print("Chip type code [HEX]: ");
    Serial.print("0x");
    Serial.print(chiptype, HEX);
    Serial.println();

    digitalWrite(LED_BUILTIN, HIGH);
    delay(3000);
    digitalWrite(LED_BUILTIN, LOW);
    Serial.println("Waiting for card");
  } else if (code != NO_CARD) {
#ifdef DEBUG_CODE
    Serial.print("Error code [HEX]: ");
    Serial.print("0x");
    Serial.print(code, HEX);
    Serial.println();

    delay(5000);
    Serial.println("Waiting for card");
#endif  //DEBUG_CODE
  }
  delay(200);
}