"基于单片机的无线通信门禁系统设计与实现"

Abstract As companies continue to prioritize security and improve their management practices, the need for effective access control systems has become increasingly important. Many companies have turned to access control systems to regulate the movement of individuals in and out of their premises. However, traditional single-door access control systems are not suitable for companies with multiple entry points, as they lack centralized management, tracking, and attendance recording capabilities. Furthermore, most smart access control systems on the market rely on wired communication methods, which are often complex, costly, and difficult to modify or expand once installed. In contrast, wireless communication offers a more flexible and scalable solution for access control systems, making it the preferred choice for future developments in this field. This paper focuses on the design of a wireless networked access control system based on microcontrollers. By examining the latest trends in access control technology and addressing key technical challenges, the study proposes a microcontroller-based networked access control system tailored for office building security management. Utilizing wireless communication technology, the system employs RF radio frequency modules for wireless data transmission. In terms of hardware design, the system adopts a simple and practical linear network structure, with RFM12 RF radio frequency modules selected for their cost-effectiveness and high integration level. On the software side, the main microcontroller functions are written in C language for readability and scalability, while a user-friendly interface is created using Visual Basic for easy management. This access control system offers a high performance-to-price ratio, addressing the limitations of wired communication systems in office building management, such as difficulty in expansion and upgrades. Keywords: access control system, wireless communication, contactless IC card.