RFID Door Lock — Arduino Access Control Prototype

RFID Door Lock was an early Arduino security and access-control prototype from 2021. The project explored how a door-lock system could combine multiple authentication and feedback methods: RFID card scanning, keypad password entry, LCD messages, servo movement, LED indicators, buzzer alerts, and SIM900-based message handling. Compared with smaller Arduino experiments, this project shows a more layered build. It connects sensor input, user authentication, display output, physical locking movement, and remote-style command handling into one prototype. This project is important because it shows Parth moving beyond single-sensor experiments into a more integrated electronics system. It combines identity checking, password logic, physical movement, user feedback, and remote command handling — all useful concepts for later automation and system-building work.

The project explored how a simple door-access system could be automated with electronic authentication. Instead of a manual lock-only setup, the prototype tested RFID-based access, password verification, feedback messages, alert behavior, and servo-controlled door movement.

The system asks the user to scan an RFID tag. If the tag matches, it moves to password entry through a keypad. When the password is accepted, the servo opens the lock position and then returns it back. If access is denied or the password is wrong, the buzzer and feedback logic are triggered. The code also includes SIM900 message handling for open/close commands.

Parth wrote the Arduino control logic, connected multiple modules, and built the authentication flow across RFID, keypad, LCD, servo, buzzer, LED, and SIM900 components. The project shows early experimentation with multi-step access control and physical automation.