Research And Design NRF24L01 Answer And Fingerprint Attendance System Based On Interactive Teaching

In recent years, many domestic and foreign companies are committed to developing classroom teaching quality and efficiency of high-tech equipment. A lot of high-tech equipment into the classroom is intended to improve the quality of classroom teaching and student learning, and now the whole multimedia teaching classroom widely used everywhere in the university, teachers can also be paperless teaching listening, speaking, reading and writing, holistic approach to imparting knowledge, students can become more fully understood form of knowledge and its vivid description of the process. Paper presents the design of a use of radio frequency technology and fingerprint recognition technology intelligent answer attendance interactive teaching systems.On the basis of the needs analysis and research, the basic mathematical principles and design ideas, as well as the need to address the problem of frequency hopping communication conducted a comprehensive analysis and design. RF modules combine the characteristics of its own band, designed for functional requirements and frequency hopping communication flow in multipoint communication, frequency hopping communication, synchronization, frequency hopping sequence and the design and planning.In the aspect of hardware circuit design, the overall framework of the system application and design are analyzed. Hardware circuit portion includes a receiver and a transmitter, and a fingerprint module, designed with 32-bit controller chip as well as mainstream fingerprint algorithm and fingerprint extraction sensor chip, the principles and design of each circuit block implementation are described.In the aspect of software, The design of the frequency hopping algorithm design and implementation, as well as lower computer program debug mode. Designed fingerprint module, developed a fingerprint extraction sensor communication protocol and module software, and the associated PC software multi-threading capabilities and links to databases, data storage database and data analysis functions to achieve the receiving end of the USB drive design.Through the improvement and application of frequency hopping algorithm,integration requirements of each module, it achieved the function based on fingerprint check-in and answer interactive system. The system effectively achieves a large classroom teaching teachers and students in the process of teaching high school students learning knowledge dynamics data and analysis, enhanced interactive classroom instruction, access to analytical data will be beneficial to help teachers improve teaching schedule and teach knowledge points. The system for the university classroom teaching provides a simple and effective way of teaching.