Design and Realization of Multifunctional Access Control System based on STM32

With the advancement of science and technology, intelligent access control technology is also rapidly evolving. In recent years, radio frequency identification (RFID) has been widely adopted in access control systems, and fingerprint identification technology is increasingly common. This paper presents a multifunctional intelligent access control system designed around the STM32 microcontroller, incorporating a 4x4 matrix keyboard, RFID-RC522 card reader module, AS608 fingerprint identification module, LCD display, buzzer, and other peripherals. The system supports three unlocking methods: fingerprint, password, and swipe card. Experimental results demonstrate that the system meets the design requirements in terms of real-time performance and stability, realizing the three modes of unlocking. It not only enhances safety but also aligns with the contemporary trend towards intelligence, showing broad application prospects.