Design And Development Of A Smart Door Security System Prototype Using Passcode And Voice Authentication Based On Arduino Uno Microcontroller In Integration Lab Of Civil Aviation Polytechnic of Surabaya

Abstract

This study aims to develop and test a prototype smart door security system based on the Arduino Uno microcontroller
with dual authentication that combines a Personal Identification Number (PIN) and voice recognition, referring to the
modern security consensus that multi-factor authentication can significantly improve protection against illegal access
compared to single methods. The PIN is used as knowledge-based verification, while voice recognition serves as
biometric verification that is difficult to forge. This study also identifies the needs of users in educational laboratories
for an efficient and user-friendly modern security system, designs a prototype with a user-friendly interface, and
measures performance through testing of PIN accuracy, voice recognition accuracy, as well as tolerance for input
variations and repetition. The method used was the prototype method, starting with needs identification (89.6% of
respondents stated they needed this system), system design with components such as Arduino Uno, 4x4 Keypad, Voice
Recognition Module V3, 16x2 LCD, relay module, and solenoid door lock, prototype creation using Arduino IDE,
functional testing, and validation of feasibility by two experts who scored it at 95.83%. Test results showed 100% PIN
accuracy and 72% voice recognition accuracy, consistent with previous research indicating accuracy levels of 65–80%
on low-cost devices. The system also proved tolerant to input variations and repetitions without performance degradation. Overall, this study demonstrates that an Arduino Uno-based dual authentication system can serve as a low-
cost, effective, and easily integrable security solution for laboratories or other confined spaces in educational environments.