This is an example sketch for our optical Fingerprint sensor

  Designed specifically to work with the Adafruit BMP085 Breakout

  ----> http://www.adafruit.com/products/751

  These displays use TTL Serial to communicate, 2 pins are required to

  interface

  Adafruit invests time and resources providing this open source code,

  please support Adafruit and open-source hardware by purchasing

  products from Adafruit!

  Written by Limor Fried/Ladyada for Adafruit Industries.

  BSD license, all text above must be included in any redistribution

 ****************************************************/

#include <Adafruit_Fingerprint.h>

#if (defined(__AVR__) || defined(ESP8266)) && !defined(__AVR_ATmega2560__)

// For UNO and others without hardware serial, we must use software serial...

// pin #2 is IN from sensor (GREEN wire)

// pin #3 is OUT from arduino  (WHITE wire)

// Set up the serial port to use softwareserial..

SoftwareSerial mySerial(2, 3);

#else

// On Leonardo/M0/etc, others with hardware serial, use hardware serial!

// #0 is green wire, #1 is white

#define mySerial Serial1

#endif

Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);

void setup()

{

  Serial.begin(9600);

  while (!Serial);  // For Yun/Leo/Micro/Zero/...

  delay(100);

  Serial.println("\n\nAdafruit finger detect test");

  // set the data rate for the sensor serial port

  finger.begin(57600);

  delay(5);

  if (finger.verifyPassword()) {

    Serial.println("Found fingerprint sensor!");

  } else {

    Serial.println("Did not find fingerprint sensor :(");

    while (1) { delay(1); }

  }

  Serial.println(F("Reading sensor parameters"));

  finger.getParameters();

  Serial.print(F("Status: 0x")); Serial.println(finger.status_reg, HEX);

  Serial.print(F("Sys ID: 0x")); Serial.println(finger.system_id, HEX);

  Serial.print(F("Capacity: ")); Serial.println(finger.capacity);

  Serial.print(F("Security level: ")); Serial.println(finger.security_level);

  Serial.print(F("Device address: ")); Serial.println(finger.device_addr, HEX);

  Serial.print(F("Packet len: ")); Serial.println(finger.packet_len);

  Serial.print(F("Baud rate: ")); Serial.println(finger.baud_rate);

  finger.getTemplateCount();

  if (finger.templateCount == 0) {

    Serial.print("Sensor doesn't contain any fingerprint data. Please run the 'enroll' example.");

  }

  else {

    Serial.println("Waiting for valid finger...");

      Serial.print("Sensor contains "); Serial.print(finger.templateCount); Serial.println(" templates");

  }

}

void loop()                     // run over and over again

{

  getFingerprintID();

  delay(50);            //don't ned to run this at full speed.

}

uint8_t getFingerprintID() {

  uint8_t p = finger.getImage();

  switch (p) {

    case FINGERPRINT_OK:

      Serial.println("Image taken");

      break;

    case FINGERPRINT_NOFINGER:

      Serial.println("No finger detected");

      return p;

    case FINGERPRINT_PACKETRECIEVEERR:

      Serial.println("Communication error");

      return p;

    case FINGERPRINT_IMAGEFAIL:

      Serial.println("Imaging error");

      return p;

    default:

      Serial.println("Unknown error");

      return p;

  }

  // OK success!

  p = finger.image2Tz();

  switch (p) {

    case FINGERPRINT_OK:

      Serial.println("Image converted");

      break;

    case FINGERPRINT_IMAGEMESS:

      Serial.println("Image too messy");

      return p;

    case FINGERPRINT_PACKETRECIEVEERR:

      Serial.println("Communication error");

      return p;

    case FINGERPRINT_FEATUREFAIL:

      Serial.println("Could not find fingerprint features");

      return p;

    case FINGERPRINT_INVALIDIMAGE:

      Serial.println("Could not find fingerprint features");

      return p;

    default:

      Serial.println("Unknown error");

      return p;

  }

  // OK converted!

  p = finger.fingerSearch();

  if (p == FINGERPRINT_OK) {

    Serial.println("Found a print match!");

  } else if (p == FINGERPRINT_PACKETRECIEVEERR) {

    Serial.println("Communication error");

    return p;

  } else if (p == FINGERPRINT_NOTFOUND) {

    Serial.println("Did not find a match");

    return p;

  } else {

    Serial.println("Unknown error");

    return p;

  }

  // found a match!

  Serial.print("Found ID #"); Serial.print(finger.fingerID);

  Serial.print(" with confidence of "); Serial.println(finger.confidence);

  return finger.fingerID;

}

// returns -1 if failed, otherwise returns ID #

int getFingerprintIDez() {

  uint8_t p = finger.getImage();

  if (p != FINGERPRINT_OK)  return -1;

  p = finger.image2Tz();

  if (p != FINGERPRINT_OK)  return -1;

  p = finger.fingerFastSearch();

  if (p != FINGERPRINT_OK)  return -1;

  // found a match!

  Serial.print("Found ID #"); Serial.print(finger.fingerID);

  Serial.print(" with confidence of "); Serial.println(finger.confidence);

  return finger.fingerID;

}