Two Authentication Access System

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1

Hello, I am trying to make a two authentication system (RFID and Fingerprint); the problem is when I scanned my fingerprint it keep showing "Fingerprint not recognized" even though I enrolled my fingerprint. Spoiler I am yet a beginner in coding, so pretty much I tried using chatGPT on creting this code.
-------Code--------

#include <Adafruit_Fingerprint.h>
#include <Servo.h>
#include <SoftwareSerial.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <SPI.h>
#include <MFRC522.h>
#include <RTClib.h>

#define SS_PIN 10
#define RST_PIN 9
String UID = "F9 FC F4 14";
byte lock = 0;

Servo servo;
LiquidCrystal_I2C lcd(0x27, 16, 2);
MFRC522 rfid(SS_PIN, RST_PIN);
RTC_DS1307 rtc; // RTC object

// Define fingerprint sensor
SoftwareSerial mySerial(2, 3); // RX, TX
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);

bool fingerprintScanned = false;

void setup() {
  Serial.begin(9600);
  mySerial.begin(57600); // Make sure this baud rate matches your fingerprint sensor module

  Serial.println("Initializing fingerprint sensor...");
  finger.begin(57600); // No need to check the return value

  servo.write(70);
  lcd.init();
  lcd.backlight();
  servo.attach(3);
  SPI.begin();
  rfid.PCD_Init();

  Wire.begin();
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }

  rtc.adjust(DateTime(__DATE__, __TIME__));

  lcd.setCursor(0, 0);
  lcd.print("Welcome!");
  lcd.setCursor(0, 1);
  lcd.print("Scan Your Card");
}

void loop() {
  if (!rfid.PICC_IsNewCardPresent())
    return;
  if (!rfid.PICC_ReadCardSerial())
    return;

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Scanning RFID");
  Serial.print("NUID tag is :");
  String ID = "";

  for (byte i = 0; i < rfid.uid.size; i++) {
    lcd.print(".");
    ID.concat(String(rfid.uid.uidByte[i] < 0x10 ? " 0" : " "));
    ID.concat(String(rfid.uid.uidByte[i], HEX));
    delay(300);
  }
  ID.toUpperCase();

  // Check if fingerprint scanning is in progress
  if (fingerprintScanned) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Please wait...");
    delay(2000); // Adjust the delay as needed
    return;
  }

  if (ID.substring(1) == UID && lock == 0) {
    servo.write(70);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Door is locked");
    delay(1500);
    lcd.clear();
    lock = 1;
  } else if (ID.substring(1) == UID && lock == 1) {
    // Trigger fingerprint scanning
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Place finger...");
    delay(1500); // Adjust the delay as needed
    fingerprintScanned = checkFingerprint();
    
    if (fingerprintScanned) {
      servo.write(160);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Access Granted!");
      delay(1500);
      lcd.clear();
      lock = 0;
    } else {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Fingerprint not recognized!");
      delay(1500);
      lcd.clear();
    }
  } else {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Denied Access!");
    delay(1500);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Welcome!");
    lcd.setCursor(0, 1);
    lcd.print("Scan Your Card");
  }

  delay(3000);

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Time: ");
  lcd.print(rtc.now().hour());
  lcd.print(":");
  lcd.print(rtc.now().minute());
  lcd.print(":");
  lcd.print(rtc.now().second());

  lcd.setCursor(0, 1);
  lcd.print("Date: ");
  lcd.print(rtc.now().year(), DEC);
  lcd.print("-");
  lcd.print(rtc.now().month(), DEC);
  lcd.print("-");
  lcd.print(rtc.now().day(), DEC);

  delay(5000);
}

bool checkFingerprint() {
  Serial.println("Getting fingerprint image...");
  uint8_t p = finger.getImage();
  Serial.println("Image capture result: " + String(p));

  if (p == FINGERPRINT_OK) {
    Serial.println("Converting image to template...");
    p = finger.image2Tz();
    Serial.println("Conversion result: " + String(p));

    if (p == FINGERPRINT_OK) {
      Serial.println("Searching for fingerprint...");
      p = finger.fingerFastSearch();
      Serial.println("Search result: " + String(p));

      if (p == FINGERPRINT_OK) {
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("Fingerprint recognized!");
        delay(1500);
        lcd.clear();
        fingerprintScanned = true; // Set flag to true
        return true;
      } else {
        Serial.println("Finger search failed. Error code: " + String(p));
      }
    } else {
      Serial.println("Image to template conversion failed. Error code: " + String(p));
    }
  } else {
    Serial.println("Error capturing fingerprint image. Error code: " + String(p));
  }

  Serial.println("Fingerprint not recognized!");
  return false;
}
2

Welcome to the forum

Have you tried asking chatGPT what is wrong and how to fix it ?

2 Likes
3

Yeah, but the output is still the same; so I tried separating the RFID and the Fingerprint and they worfed fine they can both turn the servo 90 degrees, the problem is when I try putting them together.

4

Don't give up, try again.

One answer could be 42. :grinning:

5

Yup, I will try and try again until this is good to go; but I'm intrigued on "42", what's that?

6

42 is the Answer to the Ultimate Question of Life, The Universe, and Everything.

2 Likes
7

chatGPT is only good for expert coders who understand when the AI is just spitting out crappy code...

if you are a beginner, instead of trying to fix code generated by chatGPT without having the knowledge, you should spend your time acquiring the necessary knowledge.

1 Like
8

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