Authors: Ms.Walunj P.D, Ms.Sangme S.R, Ms.Suryawanshi P.P, Ms.Hanumante K.B, Ms. Upase M.S
Abstract: This paper presents the design and implementation of an OTP (One-Time Password) based door lock system using Arduino. The system enhances security by allowing access only after successful OTP verification. The OTP is generated and transmitted to the authorized user via a GSM module. The proposed system is low-cost, reliable, and suitable for homes, offices, and restricted areas. Experimental results show that the system provides improved security compared to traditional lock systems. Security of residential and commercial premises is a major concern in today’s world. Conventional locking systems such as mechanical keys and password-based locks are vulnerable to theft, duplication, and unauthorized access. To overcome these limitations, this project presents an OTP (One-Time Password) based door lock system that provides enhanced security and flexibility. The proposed system generates a unique, time-limited OTP for every access request, which is sent to the authorized user’s registered mobile number through a GSM module. The user must enter the received OTP using a keypad or mobile interface to unlock the door. A microcontroller controls the verification process and activates a relay to operate the electronic door lock. Since the OTP is valid for only one use and for a short duration, the chances of unauthorized entry are significantly reduced. The system is simple, cost-effective, and suitable for homes, offices, and restricted areas, offering a reliable solution for modern security needs.
