低成本餐饮点菜终端无线解决方案

在分析无线餐饮点菜设备发展的基础上，给出了主题的应用背莆。硬件电路中选择了Integration公司低成本的IA4421芯片作为无线通信电路的主芯片，并设计了通信圉件程序。当多个无线餐饮点菜终端与主机通信时，通过简化Modbus协议使之应用于此半双工系统。实验证明，此无线解决方案稳定可靠，现场效果非常理想。

The Low-cost Wireless Solution of Restaurant Ordering Terminal Device

The paper gives the background of the application after analysis of restaurant ordering wireless terminal device development. In the hardware circuit,it selects low-cost IA4421 as the wireless communication＇s main chip which is produced by Integration Company At the same time it sets wireless communication configuration parameters. When a number of wireless terminals communication with host, the thesis simplifies Modbus protocol in order to apply to the half - duplex communication system. This wireless solution is stable and reliable and the device performs very well in the thai.