// Fingerprint Sensor with Arduino
// -----------------------------------
// Connection:
// Fingerprint Sensor VCC  -> Arduino 5V
// Fingerprint Sensor GND  -> Arduino GND
// Fingerprint Sensor TX   -> Arduino Pin 2 (SoftwareSerial RX)
// Fingerprint Sensor RX   -> Arduino Pin 3 (SoftwareSerial TX)
// -----------------------------------

#include 
#include 

// Define software serial pins for sensor communication
SoftwareSerial mySerial(2, 3); // RX, TX

// Create fingerprint sensor object
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);

void setup() {
  Serial.begin(9600);
  finger.begin(57600);  // Start fingerprint sensor serial at 57600 baud

  Serial.println("Initializing fingerprint sensor...");
  if (finger.verifyPassword()) {
    Serial.println("Fingerprint sensor detected!");
  } else {
    Serial.println("Fingerprint sensor not found!");
    while (1); // Halt if sensor not detected
  }
}

void loop() {
  getFingerprintID();
  delay(1000);  // Wait 1 second between reads
}

// Function to capture fingerprint and search for a match
int getFingerprintID() {
  uint8_t p = finger.getImage();
  if (p != FINGERPRINT_OK) {
    Serial.println("Failed to capture fingerprint image");
    return -1;
  }

  p = finger.image2Tz();
  if (p != FINGERPRINT_OK) {
    Serial.println("Failed to convert image");
    return -1;
  }

  p = finger.fingerFastSearch();
  if (p == FINGERPRINT_OK) {
    Serial.print("Match found! ID: ");
    Serial.println(finger.fingerID);
    return finger.fingerID;
  } else {
    Serial.println("No match found");
    return -1;
  }
}