Biometric Door Lock Security System Using Arduino & Fingerprint Sensor

Introduction: Biometric Door Lock Security System Using Arduino & Fingerprint Sensor

About: Youtuber | Electrical Engineer | Electronics Lover | Project Developer | Article Writer |

Hey Friends welcome to “Techno-E-solution” In this tutorial, I’ll show you how to make “Biometric Door Lock Security System Using Arduino Uno & Fingerprint Sensor R307.” The Biometric security system is designed using Arduino uno & fingerprint sensor R307 where once the correct finger ID is placed, the door will get open and concerned person is allow access to enter.

Biometric security system use Arduino Uno as a microcontroller where a finger ID will act as a door unlocking system or a key. we made a Biometric locks system using Arduino Uno, which provides control to the door locking system which is servomotor. It is a simple system with take input from finger print sensor and the output give command to servo motor to lock/unlock. The system provides you to delete the finger id using setting buttons. There are 4 setting buttons which gives you full control to customize the system.

1. Enroll & Back

2. Delete & Ok

3. Up & Match

4. Down & Match

Add following libraries in your Arduino IDE :-


1. Adafruit_Fingerprint.h

2. Servo.h

3. SoftwareSerial.h

4. LiquidCrystal.h

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Step 1: MATERIAL REQUIRED

Step 2: CIRCUIT DIAGRAM

Follow the circuit diagram for making connection. I make this circuit in Easy EDA software.

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Step 3: ARDUINO CODE

Simply Copy the following code & upload in your Arduino IDE software.

/*
* Hello Friends Welcome To Techno-E-Solution
* Here Is Code For Bio-Metric Security System
*/#includeLiquidCrystal lcd(13,12,11,10,9,8);
#include
SoftwareSerial fingerPrint(2, 3);
#include
Servo myServo;
#include
uint8_t id;
Adafruit_Fingerprint finger = Adafruit_Fingerprint(&fingerPrint);
#define enroll 14
#define del 15
#define up 16
#define down 17
#define openLight 6
#define closeLight 7
#define servoPin 5
void setup()
{
delay(1000);
myServo.attach(servoPin);
myServo.write(180);
pinMode(enroll, INPUT_PULLUP);
pinMode(up, INPUT_PULLUP);
pinMode(down, INPUT_PULLUP);
pinMode(del, INPUT_PULLUP);
pinMode(openLight, OUTPUT);
pinMode(closeLight, OUTPUT);
lcd.begin(16,2);
lcd.print(” BIOMETRIC “);
lcd.setCursor(0,1);
lcd.print(“SECURITY SYSTEM”);
delay(2000);
lcd.clear();
lcd.print(“TechnoEsolution”);
delay(2000);
finger.begin(57600);
Serial.begin(9600);
lcd.clear();
lcd.print(“Finding Module”);
lcd.setCursor(0,1);
delay(1000);
if (finger.verifyPassword())
{
Serial.println(“Found fingerprint sensor!”);
lcd.clear();
lcd.print(“Found Module “);
delay(1000);
}
else
{
Serial.println(“Did not find fingerprint sensor :(“);
lcd.clear();
lcd.print(“Module not Found”);
lcd.setCursor(0,1);
lcd.print(“Check Connections”);
while (1);
}
}
void loop()
{
lcd.setCursor(0,0);
lcd.print(“Press UP/Down “);
lcd.setCursor(0,1);
lcd.print(“to start System”);
digitalWrite(closeLight, HIGH);
if(digitalRead(up)==0 || digitalRead(down)==0)
{
for(int i=0;i<5;i++)
{
lcd.clear();
lcd.print(“Place Finger”);
delay(2000);
int result=getFingerprintIDez();
if(result>=0)
{
digitalWrite(openLight, HIGH);
digitalWrite(closeLight, LOW);
lcd.clear();
lcd.print(“Allowed”);
lcd.setCursor(0,1);
lcd.print(“Gete Opened “);
myServo.write(0);
delay(5000);
myServo.write(180);
digitalWrite(closeLight, HIGH);
digitalWrite(openLight, LOW);
lcd.setCursor(0,1);
lcd.print(“Gate Closed “);
return;
}
}
}
checkKeys();
delay(1000);
}
void checkKeys()
{
if(digitalRead(enroll) == 0)
{
lcd.clear();
lcd.print(“Please Wait”);
delay(1000);
while(digitalRead(enroll) == 0);
Enroll();
}
else if(digitalRead(del) == 0)
{
lcd.clear();
lcd.print(“Please Wait”);
delay(1000);
delet();
}
}
void Enroll()
{
int count=0;
lcd.clear();
lcd.print(“Enroll Finger “);
lcd.setCursor(0,1);
lcd.print(“Location:”);
while(1)
{
lcd.setCursor(9,1);
lcd.print(count);
if(digitalRead(up) == 0)
{
count++;
if(count>25)
count=0;
delay(500);
}
else if(digitalRead(down) == 0)
{
count–;
if(count<0)
count=25;
delay(500);
}
else if(digitalRead(del) == 0)
{
id=count;
getFingerprintEnroll();
return;
}
else if(digitalRead(enroll) == 0)
{
return;
}
}
}
void delet()
{
int count=0;
lcd.clear();
lcd.print(“Delete Finger “);
lcd.setCursor(0,1);
lcd.print(“Location:”);
while(1)
{
lcd.setCursor(9,1);
lcd.print(count);
if(digitalRead(up) == 0)
{
count++;
if(count>25)
count=0;
delay(500);
}
else if(digitalRead(down) == 0)
{
count–;
if(count<0)
count=25;
delay(500);
}
else if(digitalRead(del) == 0)
{
id=count;
deleteFingerprint(id);
return;
}
else if(digitalRead(enroll) == 0)
{
return;
}
}
}
uint8_t getFingerprintEnroll()
{
int p = -1;
lcd.clear();
lcd.print(“finger ID:”);
lcd.print(id);
lcd.setCursor(0,1);
lcd.print(“Place Finger”);
delay(2000);
while (p != FINGERPRINT_OK)
{
p = finger.getImage();
switch (p)
{
case FINGERPRINT_OK:
Serial.println(“Image taken”);
lcd.clear();
lcd.print(“Image taken”);
break;
case FINGERPRINT_NOFINGER:
Serial.println(“No Finger”);
lcd.clear();
lcd.print(“No Finger”);
break;
case FINGERPRINT_PACKETRECIEVEERR:
Serial.println(“Communication error”);
lcd.clear();
lcd.print(“Comm Error”);
break;
case FINGERPRINT_IMAGEFAIL:
Serial.println(“Imaging error”);
lcd.clear();
lcd.print(“Imaging Error”);
break;
default:
Serial.println(“Unknown error”);
lcd.clear();
lcd.print(“Unknown Error”);
break;
}
}
// OK success!
p = finger.image2Tz(1);
switch (p) {
case FINGERPRINT_OK:
Serial.println(“Image converted”);
lcd.clear();
lcd.print(“Image converted”);
break;
case FINGERPRINT_IMAGEMESS:
Serial.println(“Image too messy”);
lcd.clear();
lcd.print(“Image too messy”);
return p;
case FINGERPRINT_PACKETRECIEVEERR:
Serial.println(“Communication error”);
lcd.clear();
lcd.print(“Comm Error”);
return p;
case FINGERPRINT_FEATUREFAIL:
Serial.println(“Could not find fingerprint features”);
lcd.clear();
lcd.print(“Feature Not Found”);
return p;
case FINGERPRINT_INVALIDIMAGE:
Serial.println(“Could not find fingerprint features”);
lcd.clear();
lcd.print(“Feature Not Found”);
return p;
default:
Serial.println(“Unknown error”);
lcd.clear();
lcd.print(“Unknown Error”);
return p;
}

Step 4: SETTINGS

Enroll New Finger ID :-

1.Press Enroll button.

2.Use Up Button To Change Location from 1 to 127 to store finger ID.

3.Place Finger on sensor.

4.Again place same finger on sensor. (We need to place finger twice because R307 sensor works on 1:1 ratio) 5.LCD Shows Finger ID Stored !

Delete Finger ID :-
1.Press Delete Button. 2.Use Up or Down button to locate finger ID Location. 3.Then press OK Button. 4.LCD print Finger ID delete successfully.

Open Door Lock :- 1.Press Match button. 2.Place Finger On Sensor. 3.Servomotor rotate & wait for 3-4 seconds & it’ll get automatically lock.

Step 5: DEMONSTRATION

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