Article Details

Abstract

The design and implementation of an access control fingerprint password lock system based on an STM32 microcontroller are presented. The system adopts the STM32F103C8T6 as the core control unit and integrates a matrix keyboard, fingerprint recognition module, LCD1602 liquid crystal display module, buzzer, and relay to construct a low-cost access control system combining identity authentication, status display, and access control functions. Password input and management, fingerprint enrollment and recognition, relay control, and abnormal alarm functions are implemented through C language programming, while key data are stored non-volatilely using FLASH memory. Experimental results demonstrate that the system operates stably with fast response, effectively meeting the access control requirements based on dual authentication of password and fingerprint, and shows good practicality and application potential.

Keywords

STM32; access control password lock; fingerprint lock

References

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Funding

2025 Jiangsu Province College Students Innovation and Entrepreneurship Training Program Project (S202513989035)

About the authors

Feng Xinci (2005-), female, Han ethnicity, from Nanjing, Jiangsu, undergraduate student, research interests include computer science and technology (major); Wei Zhaoxiong (2005-), male, Han ethnicity, from Yancheng, Jiangsu, undergraduate student, research interests include integrated circuit design and integrated circuit systems (major); Shi Zihan (2004-), female, Han ethnicity, from Nanjing, Jiangsu, undergraduate student, research interests include computer science and technology (major).