Published Paper Details:

Abstract: In the present digital era, security has become one of the most critical concerns across various domains such as educational institutions, corporate offices, research laboratories, industrial environments, residential complexes, and government organizations. Conventional access control mechanisms based on physical keys, passwords, or manual verification methods are increasingly proving to be inefficient, unreliable, and vulnerable to unauthorized access, duplication, theft, and human error. These traditional systems also lack flexibility, scalability, and real-time monitoring capabilities. To overcome these challenges, there is a growing need for intelligent, automated, and secure access control systems that can provide accurate authentication with minimal human intervention. This paper presents the design and implementation of an Access Control System using Raspberry Pi and Radio Frequency Identification (RFID) technology. The proposed system offers a contactless, reliable, and cost-effective solution for managing access to restricted areas. RFID technology is used for user identification and authentication, where each authorized user is provided with a unique RFID card or tag containing a distinct identification number. The Raspberry Pi acts as the central processing unit, responsible for reading RFID data, validating credentials, controlling access mechanisms, and maintaining entry logs. When an RFID card is scanned near the reader, the system captures the unique identification code and sends it to the Raspberry Pi for verification. The Raspberry Pi compares the scanned data with a pre-stored database of authorized users. If the credentials match, access is granted by activating the door locking mechanism through a relay module, and a visual or audio indication is provided. In case of unauthorized access attempts, the system denies entry and displays an alert message. This real-time decision-making process ensures high accuracy and improved security. The experimental results demonstrate that the proposed access control system is efficient, reliable, and responsive. It successfully authenticates authorized users within a short time and effectively blocks unauthorized access attempts. The system operates with low power consumption and minimal hardware complexity, making it suitable for small-scale as well as large-scale deployments. Overall, the proposed solution provides a secure, scalable, and user-friendly access control mechanism that can significantly enhance safety and automation in modern infrastructures.