Design And Implementation Of IOT Gateway Based On Embedded Operating System μTtenux

The Internet of things (IOT) is transforming from concept into actual product under the development and improvement of involved technology, penetrating into people’s production and life. The development of the IOT brings with it new intelligent operation mode in agriculture, industry, transportation, communication, commodity logistics industry. IoT is divided into sensor network layer, transmission layer and application layer in overall frame. As the devices increased in the sensor network layer, there are not identical protocol follows. But the network layer and application layer can base on existing Ethernet,2G/3G/4G, xPON, GPRGS, ADSL network technology. Gateway, as the equipment connection between bottom sensor network layer and middle transmission layer, is a very important part. There is not a uniform standard or specification, which brought difficulties and challenges to the design of universal gateway.The purpose of this paper is to design a universal intelligent gateway, using embedded operating system and ARM Cortex M3/4chips. And then give a solution of ZigBee and TCP/IP protocol conversion gateway on this platform. This design uses the μTenux and μT/Studio, providing two times development API to users. The specific work and results are as follows:1. Analyze the μT/OS kernel of μTenux, and transplantation method of TCP/IP, GUI, FatFS Midware on it.2. Design IoT gateway architecture, GW-Open Platform, based on ARM Cortex M core and μTenux.3. Build μT/Studio open source cross compiler environment using Eclipse and GCC/GDB tool chain in the Windows XP/7system.4. Design a gateway blending ZigBee and TCP/IP protocol on GW-Open Platform. The gateway provides Wi-Fi control interface for user, supporting OTA, risk management and behavior analysis.5. Verify the basic properties and feasibility of the design by using STM32F432NI OEM board and UART interface Wi-Fi module, SPI ZigBee module.