By Flávia C. Delicato, Paulo F. Pires, Thais Batista
After a quick creation and contextualization on the net of items (IoT) and net of items (WoT) paradigms, this well timed new booklet describes one of many first examine tasks aimed toward tackling the various demanding situations all for construction a middleware-layer infrastructure in a position to understanding the WoT imaginative and prescient: the SmartSensor infrastructure. it truly is according to present standardization efforts and designed to regulate a particular form of actual units, these equipped to form a instant Sensor community (WSN), the place sensors paintings collaboratively, extracting information and transmitting it to exterior networks to be extra analysed and processed. Middleware recommendations for the net of Things describes this infrastructure and its RESTful-based programming version that enables builders create purposes with no need particular wisdom approximately actual units or networking environments. it's also proven, step-by-step, the way to create an online Mashup software utilizing SmartSensor.
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Extra info for Middleware Solutions for the Internet of Things
RESTful web services versus big web services: making the right architectural decision. In Proceeding of the 17th International Conference on World Wide Web. cfm? id=1367606. 22. , et al. (2008). Tiny web services: design and implementation of interoperable and evolvable sensor networks. In Proceedings of the 6th ACM Conference on Embedded Network Sensor Systems. USA. 23. 30:9090/RDF/RQL/. 24. Resource Description Framework (RDF). (2010). org/ RDF/. 25. RFC 2068. (1997). 1. org/html/rfc2068. 26.
MEMSIC technology for WSN platforms is based on the TinyOS operating system and programs to be deployed in the nodes are written in nesC language. As specified in the MIS logical architecture, a sensor node must have three basic functional blocks to be integrated into the SmartSensor infrastructure: Communication, Publication, and Sensor. TinyOS adopts a component-based and event-driven programing model, and nesC is a language derived from C, so it does not natively incorporate concepts of object-oriented programing.
7 Temperature data provided by a sensor with ID = 11 Fig. 4 Accessing and Using WoT-Enabled WSNs Through the SmartSensor 27 is performed using the traditional TCP/IP protocol stack between the application and the gateway. Once the gateway receives the HTTP request, the SIM components process the message content and then build a new message in the specific format of the WSN platform whose nodes need to be tasked to meet the request. This new message in the format understood by the sensor nodes is sent through a serial cable that connects the desktop computer to the wireless communication component (part of the gateway implementation that acts as the WSN sink node).