Fingerprint Lock Using Arduino Mega 2560

Sr Karthiga

6y34.7k24100Article

IoT Arduino Arduino Mega 2560FingerprintFingerprint Lock

24 Comments

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Ranjeet Sunar5y ago
How to fix error in fingerprint.h
Meggaa Mann7y ago
Kindly provide a link to the libraries you are using for this code.
- Meggaa Mann7y ago
  Found them: https://www.arduino.cc/en/reference/libraries
Piratheepan Pirathi9y ago
Can any one send me the code to arduino c# fingerprint connection
Sr Karthiga10y ago
thank you prasanna
Prasanna Murali10y ago
Nice one...
Sr Karthiga10y ago
Thank you sirisha
Sirisha K10y ago
good one
Sr Karthiga10y ago
Thank you shubham sir
Shubham Kumar10y ago
nice'
Sr Karthiga10y ago
thank you asfend sir
Asfend Yar10y ago
good
Sr Karthiga10y ago
thank you gowtham sir
Sr Karthiga10y ago
Thank you ankur sir
Gowtham K10y ago
Good One
Ankur Mistry10y ago
Nice, Helpful stuff
Sr Karthiga10y ago
Thank you sibeesh sir
Sr Karthiga10y ago
Thank you vignesh mani sir
Sibeesh Venu10y ago
Nice Share
Vignesh Mani10y ago
Good one
Sr Karthiga10y ago
thank you asfend sir
Sr Karthiga10y ago
Thank you kumaresh sir
Asfend Yar10y ago
nice
Kumaresh Rajalingam10y ago
Very Nice

Introduction

In this article, I will explain how to create a Fingerprint Lock using Arduino Mega 2560. It will be used to identify the same user in the same way that a fingerprint scanner works.

Parts

Fingerprint sensor
Arduino Mega 2560
Servo motor
Jumper wires

Fingerprint Sensor

Figure 1: Fingerprint Sensor

It is an electronic device and captures digital images.
The captured image is called a live scan.
It simply identifies the fingerprint and gives the result.
It can easily match the fingerprint.

Connection:

Step 1: Connection From Servo Motor To Arduino Mega 2560,

The servo first pin can be connected to the Gnd.
The second pin can be connected to the VCC.
The third pin can be connected to the digital pin 06 of the Arduino Mega 2560.

Step 2: Connection From Fingerprint Sensor To Arduino Mega 2560,

The Gnd pin of the fingerprint sensor to the Gnd of the Arduino Mega 2560
The Vcc pin of the fingerprint sensor to the 5v of the Arduino Mega 2560
The Rx pin can be connected to the A4 of the Arduino Mega 2560.
The Tx pin can be connected to the A5 of the Arduino Mega 2560.

Programming

#include<Fingerprint.h>
#include<SoftwareSerial.h>
#include<Streaming.h>
#include<Servo.h>
#define __Debug 1
const int pinServo = 6;
const int angleServo = 60;
#if __Debug
#define DBG(X) Serial.println(X)
#else
#define DBG(X)
#endif
SoftwareSerial mySerial(A5, A4);
Fingerprint finger = Fingerprint( & mySerial);
Servo myservo;
void open_close_door()
{
myservo.attach(pinServo);
for (int i = 20; i < angleServo; i++)
{
myservo.write(i);
delay(5);
}
delay(2000);
for (int i = (angleServo - 1); i >= 20; i--)
{
myservo.write(i);
delay(5);
}
myservo.detach();
}
void setup()
{
Serial.begin(38400);
finger.begin(19200);
delay(500);
DBG("setup ok!");
}
void loop()
{
if (getFingerprintIDez() >= 0)
{
open_close_door();
DBG("get right finger, open door now!!");
delay(2000);
}
delay(50);
}
int getFingerprintIDez()
{
if (!finger.verifyPassword())
{
DBG("Did not find fingerprint sensor :(");
return -1;
}
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;
}
#if __Debug
Serial.print("Found ID #");
Serial.print(finger.fingerID);
Serial.print(" with confidence of ");
DBG(finger.confidence);
#endif
return finger.fingerID;
}

Explanation:

When the fingerprint is the same, the sensor identifies it and prints the message as matched.
The servo motor also gets rotate to the 60-degree direction.
When fingerprints do not match, a message is sent as "Not Matched."

Output:

Figure 2: Output.