The Design And Realization Of Iotgw Based On Cortex-A8

As the third wave of information industry, the Internet of things (IOT) is the important productivity to promote high speed development of the world and has a huge market potential."All things connect" will change people’s life, bringing great convenience in people’s life. As the connection of sensor network and transmission network, the gateway of IOT (IOTGW) mainly has the capability of a wide range of access, protocol translation and manageable, etc. and it is the essential equipment in the IOT system. The result of researchs about IOTGW directly affects the development of the entire IOT system.Traditional gateway is work above the network layer and is only used to connect different network, can not meet the requirements of IOTGW; The IOTGW that has preliminary development is basically focus on the function and ignore the importance of human-computer interaction and user experience. Therefore, according to the actual needs of the new generation IOTGW, and based on the research of embedded system technology, embedded Web server technology, wireless sensor network technology, human-computer interaction or related technology, this article choose the ARM Cortex-A8series processor as the control core of hardware platform, carrying the most popular mobile operating system Android, installing the Web server i-jetty and developing the relevant Web project, combining of Zigbee wireless sensor network to realize a IOTGW that can transmit with the node and has the ability to control and manage the wireless sensor network.In this paper, the hardware system and software system of the gateway has designed detailly. Firstly, design different interface module, mainly including RS232serial interface module and USB interface module based on the processor core modules has selected, for the IOTGW should have the ability of different sensor network to access. Secondly, in view of the protocol conversion capability, design the system data communication protocol that is data frame format to unify the standard of the data transfer. Finally, aiming at IOTGW should have the management ability, develop corresponding Zigbee interface app on Android to realize the local management and install i-jetty Web server to provide a good remote management interface within B/S mode.After the test, the IOTGW system that this paper design runs stably and response rapid, not only has realized the basic function, also has good man-machine interface for conveniently management.