基于433MHz-RFID的无线呼叫系统设计

The Development and Design of Wireless Calling System Based on 433MHz-RFID

采用433 MHz无线射频技术,设计以STM32单片机为中央控制器构建远距离无线呼叫网络.首先通过嵌入式技术实现433MHz无线呼叫系统信号接收和发射,然后通过单片机对433MHz无线射频信号解码,通过蓝牙模块转发给上位机,使上位机能够收到无线呼叫系统的呼叫,及时处理呼叫号码.解决现有有线网络布线繁琐,维护不便,设备固定等缺点.因此该无线呼叫系统成本低、质量高、易用性强,适应公共场所使用.

By adopting 433 MHz radio frequency technology,the design uses the STM32 as the SCM to serve as the central controller so as to construct the long distance wireless calling network.Firstly,the embedded technology is used for the realization of sending and receiving of signals from the 433 MHz wireless calling system;then through the use of single chip machine,the 433 MHz radio frequency signals are decoded,and by aid of the BT module,the decoded signal is sent to upper machine by BT module.Thus the upper machine can receive the calling signal and process the signal promptly.The wireless calling system can rid the existing wired system the disadvantages of its wiring complexity,inconvenience of maintenance,and its equipment being irremovable.Therefore the wireless calling system boasts its low cost,high quality and satisfactory operability and thus can find wide application in public places.