<![CDATA[Purpose: This study aims to design and implement an RFID-based smart door lock prototype using Arduino Uno as an interactive learning medium for automatic door security technology at UPTD Graha Teknologi Sriwijaya.Research Methodology: This study uses a descriptive method with a qualitative approach. Data were collected through observation, interviews, and documentation at UPTD Graha Teknologi Sriwijaya. System development applied the prototype method through requirements analysis, initial design, prototype construction, functional testing, evaluation, and implementation.Results: The prototype integrates an Arduino Uno, RFID RC522 reader, RFID card/keychain, 16×2 I2C LCD, SG90 servo motor, buzzer, 18650 lithium-ion battery, step-up charger, switch, and a 3D-printed smart home model.Conclusions: Functional testing shows that registered RFID identifiers trigger the opening sequence and feedback, while unregistered identifiers are rejected, and the door remains locked. The prototype therefore provides a practical demonstration of RFID identification, microcontroller-based decision making, automatic actuation, and user feedback.Limitations: The study does not evaluate long-term durability, advanced cybersecurity, large-scale deployment, or statistical learning outcomes.Contributions: The study offers a reproducible educational prototype concept that connects embedded-system components with an observable learning interaction in a science-center environment.]]>
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