Wireless electronic ordering system is an important part of the information management of restaurants. The application of this system will not only bring good economic benefits to catering enterprises, but also be conducive to the promotion and application of advanced science and technology in the national economy, and produce good social benefits. At present, there are many high-end and low-end ordering systems in China, but the promotion speed is very slow. The reason is the lack of mid-range products suitable for China\'s national conditions. This paper analyzes the advantages and disadvantages of various ordering systems in the domestic market, points out that the key difference between ordering systems lies in the choice of ordering terminals and communication methods, and on this basis proposes a mid-range wireless ordering terminal solution suitable for specific application occasions: using embedded systems to develop wireless ordering terminals and using short-range wireless communication technology for data transmission. The article first analyzes the system composition and function allocation of wireless ordering machines, and on this basis designs the hardware of each component module of the system. Then, the whole process of touch screen data acquisition is analyzed, the various factors affecting the accuracy of touch screen data are discussed, and a \"three-step method\" for data correction is proposed. Then the article compares several commonly used small-range wireless communication methods, determines the use of wireless radio frequency single chip to achieve short-range wireless communication, and elaborates on the design of data frame format and hierarchical communication protocol. The model of the communication system adopts the method of master station inquiry and slave station monitoring. Finally, the specific development of the software, first of all, the transplantation of μC/OS-Ⅱ operating system and the design of Boot Loader startup code are studied, and they are successfully transplanted and downloaded to S3C44BOX. Then, based on this operating system, the design of the ordering interface, communication protocol and key driver is carried out. This design has certain reference and guiding significance for the development of terminals based on embedded μC/OS-Ⅱ operating system, and has commercial practical value for self-service catering industry. At the same time, as a handheld product, it can be carried with you and can be used in a variety of occasions that support wireless Internet access, with certain market application prospects and commercial practical value.
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