Research and Design of Wireless Sensor Middleware Based on STM32

In order to make agricultural production become more convenient, also meet the requirement of the modern intelligent agriculture to make control equipment integrated and miniaturization, the paper designed a wireless sensor middleware based on STM32. This

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Abstract. In order to make agricultural production become more convenient, also meet the requirement of the modern intelligent agriculture to make control equipment integrated and miniaturization, the paper designed a wireless sensor middleware based on STM32. This wireless gateway receives control command from the control software of agricultural IOT application which installed in the tablet computer through the WiFi/USART module, after the data processing and protocol conversion, then send the control signal to the wireless sensor network through the USART port. At the same time, if a particular model of agricultural sensor changes state, it also can timely feedback to the tablet computer to display through the gateway. This plan solved the problem of real-time monitoring of agricultural information and realized remote control. The experimental results show that, the wireless sensor middleware has the characteristics of light and handy, high control precision, data large quantity and high speed. It’s very appropriate for intelligent agricultural system application. Keywords: STM32

 Wireless sensor  Middleware  Zigbee

1 Introduction With the rapid development of Internet of things, IOT middleware becomes one of the important research topics in related fields in recent years, also acquired a lot of research results, mainly divided into application service middleware, embedded middleware. Such as White [1] put forward a kind of typical middleware based on J2EE architecture, has a good scalability. paper [2] proposed wireless sensor network middleware based on mobile Agent, the middleware has data management, integration, application target adaptive control strategy, Wang fan design and implemented an IOT middleware, that can filter the heterogeneous network data, integrate ZIGBEE and RFID (Radio Frequency Identification, RFID) data into a unified format [3]. Paper [4–7] proposed database based middleware, it views the entire network as a distributed database, users use similar to SQL query command to get the data needed, query is distributed to each node through the network, the nodes determine whether the sensory data satisfy the query conditions, and decide to send data or not. Deng Yihua etc. Put forward embedded RFID middleware on smart RFID read-write device [8], it can realize the management of multiple read/write devices, strengthen the deployment flexibility. The domestic scholars make use of the gateway hardware to research IOT © IFIP International Federation for Information Processing 2016 Published by Springer International Publishing AG 2016. All Rights Reserved D. Li and Z. Li (Eds.): CCTA 2015, Part II, IFIP AICT 479, pp. 579–585, 2016. DOI: 10.1007/978-3-319-48354-2_60

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system [8–11], however, the research and design of STM32 based wireless sensor network middleware is still relatively rare. The research combines the ZigBee wireless sensor network with the STM32 MCU, it has the advantages of simple structure, strong generalization ability and others. The objective of this study