Designed And Implementation Of A Lan Protocol Stack Based On The 433M Module

As the development of the internet of the things, sensor technology, wide area network, and LAN network technology, such as Wi-Fi, ZigBee, Bluetooth are rapidly developing. But there is no appropriate technology when the environment is poor or the device require strong penetrating power and long distance of data transmit.Firstly the article introduces some local area network technology that is commonly used and analyses their characteristics and suitability for the field, then introduced the construction of LAN framework and related technologies and the features of the protocol designed for the hardware module. With the guidance of A LAN Standard Architecture, the reference of wireless protocol standard, especially the IEEE802.15.4 standard ZigBee protocol, product needs, the system design, module design and interface design The article gives a detailed description of 433 M band wireless protocol design process which is based on 433 module. Also the article introduced design of the protocol frame structure, primitive and protocol procedures and application layer interactive message. Finally it introduced the protocol in the server and client and the result that test.This protocol is a master-slave star topology structure, it also implement automatic roaming function except automatically joined network, broken network, data communication and makes the network coverage area according to demand.