基于nRF24LE1的无线报警系统设计与实现

Design and implementation of wireless alarm system based on nRF24LE1

挪威Nordic半导体推出的2.4G射频系统芯片nRF24LE1是世界上最小、集成度最高的单片超低功耗芯片,本文利用其无线收发功能设计了一种简单的实时监控无线报警系统。系统实现一台主机对多个卡片的同时监控,卡片丢失后主机卡片双端报警。硬件上,卡片与主机外接LED灯和蜂鸣器以实现视觉与听觉上的报警,同时主机外接液晶屏以显示丢失卡片的具体卡号等信息。软件上系统采用主机配给卡片信息的初始化方法,以实现卡片卡号的动态分配。经实际测试,系统最终可实现对25m范围内卡片的监控,报警工作正常,能够满足一般实验室,小型厂房的监控要求。

nRF24LE1 produced by Nordic is the world＇s smallest, most integrated single-chip 2.4 G RF low-power wireless transceiver system chip. In this paper,it is used to set up a simple real-time monitoring system. This system achieves that a host monitors multiple cards at the same time,and the host and cards will do alarm when any cards are lost. In hardware design,this system uses external LED and buzzer to achieve alarm if necessary,and a LCM is used to display lost cards information such as card numbers. In the software design, it uses the initialization method that host distributes card information in order to realize dynamic card number distribution. In the actual test,the system works normally within 25 meters, and it can meet the general laboratory or small plant monitoring requirements.