Arduino দিয়ে ফিঙ্গারপ্রিন্ট ডোর লক প্রোজেক্ট

#include <Adafruit_Fingerprint.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>

// On Leonardo/Micro or others with hardware serial, use those! #0 is green wire, #1 is white

// uncomment this line:

#define mySerial Serial1

// 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)

// comment these two lines if using hardware serial

SoftwareSerial mySerial(2, 3);

LiquidCrystal_I2C lcd(0x27, 16, 2); // set the LCD address to 0x27 for a 16 chars and 2 line display

Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);

bool lastState = -1;

int relay1 = 8;


void setup() {
  pinMode( relay1, OUTPUT);

  digitalWrite(relay1, HIGH);

  lcd.init();

  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);

  if (finger.verifyPassword()) {

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

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

    while (1) {
      delay(1);
    }
  }

  finger.getTemplateCount();

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

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

  displayWaitFinger();
}


void loop() {                     // run over and over again
  int id;
  
  id = getFingerprintIDez();

  if ( id == -1 ) {

    if ( lastState == 0) {

      lastState = -1;

      displayInvalidFinger();

      delay(2000);

      displayWaitFinger();
    }
  } else if ( id != -1) {

    digitalWrite(relay1, LOW);

    displayFingerOK();

    delay(2000);

    displayWaitFinger();

    digitalWrite(relay1, HIGH);
  }
  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.fingerFastSearch();

  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();

  Serial.println(p);

  if ( p == 0 ) {

    lastState = 0;
  }

  if (p != FINGERPRINT_OK)  return -1;

  p = finger.image2Tz();

  if (p != FINGERPRINT_OK)  return -1;
  
  p = finger.fingerFastSearch();

  if (p != FINGERPRINT_OK)  return -1;

  lastState = 1;

  // found a match!

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

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

  return finger.fingerID;
}

void displayWaitFinger() {
  lcd.clear();

  lcd.backlight();

  lcd.setCursor(0, 0);

  lcd.print("PUT YOUR FINGER");

  lcd.setCursor(0, 1);

  lcd.print("ON THE SCANNER");
}

void displayInvalidFinger() {
  lcd.clear();

  lcd.backlight();

  lcd.setCursor(0, 0);

  lcd.print("FINGER");

  lcd.setCursor(0, 1);

  lcd.print("NOT FOUND!!!");
}

void displayFingerOK() {
  lcd.clear();

  lcd.backlight();

  lcd.setCursor(0, 0);

  lcd.print("WELCOME ");

  lcd.setCursor(0, 1);

  lcd.print("DOOR UNLOCK");
}