Development of a Solar-Powered Autonomous Door Lock System
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Abstract
This paper describes the design, development, and installation of a smart door lock for an administrative office. There were some persistent issues with traditional door lock systems in institutional settings. It includes the inability to access audit history, the susceptibility to duplication, and the absence of flexible and continuous authentication choices. The system combines biometric identity, intelligent automation, and sustainable energy to provide a single access control solution. Using an R307 optical fingerprint sensor with a facial recognition module powered by a Deepface library and a 4x4 matrix keypad for PIN-based security entry with flexible multimodal access, the system was built around a Raspberry Zero Was the core controller. There is a provision of physical actuation by a 12V solenoid lock, and the autonomous and sustainable off-grid energy source is powered by a solar energy system. The system performance was evaluated in a real-world environment with different lighting and weather conditions taking into consideration. With 94% accuracy for fingerprint recognition, 85% reliability for facial recognition in typical illumination, and 100% accuracy for keypad entry, all authentication choices answered in less than three seconds. In line with Sustainable Development Goals 9 and 11 as well as one of the ideas of the Fourth Industrial Revolution, the work offers an adaptable, multimodal, and energy efficient access control system.
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References
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