Design and Implementation of Fingerprint Access Controller Based on STM32

Design and Implementation of Fingerprint Access Controller Based on STM32

I.

With the development of technology, biometric recognition technology has become an important means in the field of security today. Among them, fingerprint recognition technology is widely favored due to its high precision and reliability. This article will introduce the design and implementation of a fingerprint access controller based on STM32, aiming to provide users with a safe and convenient fingerprint authentication method.

II. System Design

1. Hardware Design

The system uses the STM32F4Discovery board as the main control chip, equipped with a high-quality fingerprint sensor for fingerprint acquisition and recognition. The system also includes power management modules, storage modules, communication modules, etc.

2. Software Design

The system software is developed using embedded C language, including modules such as fingerprint acquisition, comparison, user management, and permission allocation. By calling fingerprint sensor drivers and related algorithm libraries, it achieves fast and accurate fingerprint recognition.

III. Implementation and Testing

1. Fingerprint Acquisition

The system acquires fingerprint information from the fingerprint sensor through STM32 and performs preprocessing and feature extraction.

2. Fingerprint Comparison

The system uses a self-developed comparison algorithm to compare the acquired fingerprints with stored fingerprint templates to determine if they match.

3. User Management

The system supports adding, deleting, and modifying user information and can assign different access permissions based on permission distribution.

4. Testing

We conducted rigorous testing on the system, including stability tests, fault tolerance tests, and security tests. The test results show that the system runs stably with an identification accuracy rate of over 95%.

IV. Application and Outlook

1. Application Scenarios

This fingerprint access controller can be widely used in various scenarios requiring identity authentication, such as office buildings, school dormitories, smart homes, etc. By setting different levels of permissions, it ensures information security and privacy protection.

2. Outlook

With the continuous development of biometric recognition technology, we will see more bio-recognition products based on STM32 in the future. In terms of safety, accuracy, and portability, continuous optimization will bring users a smarter and more convenient identity authentication experience.

In conclusion, the fingerprint access controller based on STM32 has significant advantages in terms of safety and convenience, providing reliable identity authentication services for various application scenarios. Through continuous technological innovation and product optimization, we believe this field will have a broader development prospect.