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Design of wireless door guard control system based on 51 MCU and nRF24L01

Zhang Yonghong,Cao Jian,Wang Lihua(School of Information and Control,Nanjing University of Information Science and Technology,Jiangsu Nanjing 210044,China)  
This paper presents the hardware and software design of a low-power wireless door-guard control system based on 51 MCU and nRF24L01 wireless transceiver chip,so as to solve the current door-guard system for high power,high cost and low expansibility problems.The system consists of a sender and a receiving end.PC control signals are received,encrypted and sent by the sender.The receiving end receives and decrypts the control signals and controls the door-guard system.The result of many different environment grouping tests shows that the system is of low cost,good real-time performance,high security,good scalability and is suitable for a variety of small spaces with different environments.
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