/*

Voltaat learn (http://learn.voltaat.com)

Link for full tutorial:

Tutorial: Building an electronic lock to open the door with a fingerprint

The purpose of this sketch is that when an authorized finger is placed on the fingerprint sensor,

the blue light will turn on, and the servo motor will rotate by 90 degrees to open the door.

If an unauthorized finger is placed, the red light will turn on, and the servo motor will not move.

Connections from the Arduino to the breadboard:

• Arduino GND pin → Breadboard ground line

• Arduino 5V pin → Breadboard 5V line

Connections from the R307 FINGERPRINT Module:

• VCC pin → breadboard 5v line

• GND pin→ breadboard GND line

• TX pin→ Arduino pin 3

• RX pin → Arduino pin 2

Connection from the LCD:

• VCC pin → breadboard 5v line

• GND pin→ breadboard GND line

• SDA pin→ Arduino analog pin A4

• SCL pin → Arduino analog pin A5

Connections from the servo motor:

• Servo GND pin→ breadboard GND line

• Servo 5V pin→ breadboard 5V line

• Servo signal pin → Arduino pin 9

Connections from the Green LED :

• Green LED anode pin → Arduino pin 7

• Green LED cathode pin → 220 ohm resistor → Breadboard ground line

Connections from the Red LED :

• Red LED anode pin → Arduino pin 6

• Red LED cathode pin → 220 ohm resistor → Breadboard ground line

*/

#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);

uint8_t id;

void setup()

{

 Serial.begin(9600);

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

 delay(100);

 Serial.println("\n\nAdafruit Fingerprint sensor enrollment");

 // set the data rate for the sensor serial port

 finger.begin(57600);

 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);

}

uint8_t readnumber(void) {

 uint8_t num = 0;

 while (num == 0) {

   while (! Serial.available());

   num = Serial.parseInt();

 }

 return num;

}

void loop()                     // run over and over again

{

 Serial.println("Ready to enroll a fingerprint!");

 Serial.println("Please type in the ID # (from 1 to 127) you want to save this finger as...");

 id = readnumber();

 if (id == 0) {// ID #0 not allowed, try again!

    return;

 }

 Serial.print("Enrolling ID #");

 Serial.println(id);

 while (! getFingerprintEnroll() );

}

uint8_t getFingerprintEnroll() {

 int p = -1;

 Serial.print("Waiting for valid finger to enroll as #"); Serial.println(id);

 while (p != FINGERPRINT_OK) {

   p = finger.getImage();

   switch (p) {

   case FINGERPRINT_OK:

     Serial.println("Image taken");

     break;

   case FINGERPRINT_NOFINGER:

     Serial.print(".");

     break;

   case FINGERPRINT_PACKETRECIEVEERR:

     Serial.println("Communication error");

     break;

   case FINGERPRINT_IMAGEFAIL:

     Serial.println("Imaging error");

     break;

   default:

     Serial.println("Unknown error");

     break;

   }

 }

 // OK success!

 p = finger.image2Tz(1);

 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;

 }

 Serial.println("Remove finger");

 delay(2000);

 p = 0;

 while (p != FINGERPRINT_NOFINGER) {

   p = finger.getImage();

 }

 Serial.print("ID "); Serial.println(id);

 p = -1;

 Serial.println("Place same finger again");

 while (p != FINGERPRINT_OK) {

   p = finger.getImage();

   switch (p) {

   case FINGERPRINT_OK:

     Serial.println("Image taken");

     break;

   case FINGERPRINT_NOFINGER:

     Serial.print(".");

     break;

   case FINGERPRINT_PACKETRECIEVEERR:

     Serial.println("Communication error");

     break;

   case FINGERPRINT_IMAGEFAIL:

     Serial.println("Imaging error");

     break;

   default:

     Serial.println("Unknown error");

     break;

   }

 }

 // OK success!

 p = finger.image2Tz(2);

 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!

 Serial.print("Creating model for #");  Serial.println(id);

 p = finger.createModel();

 if (p == FINGERPRINT_OK) {

   Serial.println("Prints matched!");

 } else if (p == FINGERPRINT_PACKETRECIEVEERR) {

   Serial.println("Communication error");

   return p;

 } else if (p == FINGERPRINT_ENROLLMISMATCH) {

   Serial.println("Fingerprints did not match");

   return p;

 } else {

   Serial.println("Unknown error");

   return p;

 }

 Serial.print("ID "); Serial.println(id);

 p = finger.storeModel(id);

 if (p == FINGERPRINT_OK) {

   Serial.println("Stored!");

 } else if (p == FINGERPRINT_PACKETRECIEVEERR) {

   Serial.println("Communication error");

   return p;

 } else if (p == FINGERPRINT_BADLOCATION) {

   Serial.println("Could not store in that location");

   return p;

 } else if (p == FINGERPRINT_FLASHERR) {

   Serial.println("Error writing to flash");

   return p;

 } else {

   Serial.println("Unknown error");

   return p;

 }

 return true;

}

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