Design and Simulation of an Arduino-Based Password-Protected Door Locking System

In the contemporary world, where technology has advanced and with the incidents of thefts increasing, more traditional locking mechanisms such as a single lock and key are needed to offer better security. New reliable, intelligent, and smart door-locking mechanisms are necessary to improve the security and safety of residential or commercial properties. This paper aims to describe the design and implementation of an Arduino-based door lock system that includes an LCD for displaying the related information, a servo motor that controls the door's locking mechanism, and a keypad that will be used for user input. The suggested method is password protected since it asks the user for their password before accessing a door. When a user enters an erroneous password more than a predetermined number of times, the system also offers the option to reset the password and lock it out for a predetermined period. An additional feature of using the GSM module is to implement a function that notifies the owner of any unwanted access by sending a message to them when the door is locked after the number of erroneous passwords exceeds the set limit, thus alerting the owner of any unauthorized access. T