International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 08 | Aug 2025
p-ISSN: 2395-0072
www.irjet.net
IoT-Based Biometric Door Locking System Sathish K R1, Harish Kumar G2, Sangeetha K A3 , Sinchana I M4, Sujan M5 1Assistant Professor, Department of Electrical and Electronics Engineering, ATME College of Engineering, Mysuru,
Karnataka, India-28
2Student, Department of Electrical and Electronics Engineering, ATME College of Engineering, Mysuru28
Student, Department of Electrical and Electronics Engineering, ATME College of Engineering, Mysuru28 Student, Department of Electrical and Electronics Engineering, ATME College of Engineering, Mysuru28 5Student, Department of Electrical and Electronics Engineering, ATME College of Engineering, Mysuru28 ---------------------------------------------------------------------***--------------------------------------------------------------------3 4
Abstract - Security concerns have always been a
traditional locks, as replicating or forging biometric data is much more challenging than stealing a key or guessing a password.
significant issue in everyday life. Traditional physical keys are prone to duplication and loss, leading to security vulnerabilities. To address this problem, a biometric security system using fingerprint recognition is implemented. The proposed system uses a fingerprint sensor to authenticate users and control door access. If the fingerprint matches stored records, the door lock is activated. Otherwise, access is denied. The system integrates an Arduino microcontroller, HC-05 Bluetooth module, and relay module to ensure secure and efficient functioning. This approach enhances security by eliminating the risks associated with traditional keys.
1.1 Need of Smart lock system The geographic scope of this research is limited to a personal property (house, apartment and office). The design and execution scope of this research is confined to designing and building a comprehensive, low-cost home control system using a mobile application that communicates with the Arduini UNO through the Bluetooth. C or C++ programming languages are used to install an operating system on the Arduini UNO to enable running specific applications. Further, the research seeks to assemble an electronic board that contains circuits which is responsible for a certain function in the door control system, and each of which communicates with the Arduini UNO. The access system using smart hand free door lock can be developed after a method to interface between App, microcontroller and database must be done first. To make it realistic, smart phone can be scanned using Bluetooth. Then, some database can be used to perform comparison between user smart phone data and data store from the admin. If the user is not in the database he/she have to press the door ball, image of the user will be visible to admin in App to decide whether to open the door or not, the output from the microcontroller will be represents of magnetic lock, door ball and IP camera which will be control and monitor from android app in final step.
Key Words: Arduino UNO, HC-05 Bluetooth Module, Power Relay, Biometric Sensor 1. INTRODUCTION IoT comprises things that have unique identities and are connected to internet. By the end of the 2024 there will be more than 75 billion devices /things connected to internet. IoT is not limited to just connecting things to the internet but also allow things to communicate and exchange data. The things in IoT refer to IoT devices that have unique identities and perform remote sensing, actuating, and monitoring capabilities. IoT devices can exchange data with other connected device applications. It collects data from other devices and process data either locally or remotely. An IoT device may consist of several interfaces for communication to other devices both wired and wireless. These include • I/O interfaces for sensors, • Interfaces for internet connectivity • Memory and storage interfaces • Audio/video interfaces. IoT-based biometric door locking system integrates biometric technology with Internet of Things (IoT), enhancing security and convenience in access control. “A biometric door locking system is a security device that uses unique physical or behavioral characteristics, to identify and unlock doors. Some examples of biometric characteristics include fingerprints, facial recognition, to unlock door”. Biometric door locks are more secure than
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Fig 1.1 Image of Biometric Door lock system
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