Abstract
The paper addresses the challenges of implementation of Internet of Things concept when solving the prob-lems of distributed diagnostics in a technical sphere and medicine. To implement data exchange in a sensor network as in an open, distributed and self-organized system it is proposed to develop multi-agent software for diagnostic devices. A mediator agent pattern is proposed as a solution, that implements intermediary functionality in wireless sensor network (the network powered by such a software is called a Mediator network). The devices for data processing under the mediator agent control implement not only their direct purpose, but also take part in data transfer between other devices and adapt time sampling in-tervals. Load balancing is provided this way by load distribution between the sensors according to events velocity. The paper describes the functionality and architecture of a mediator agent, its pattern in the form of UML classes diagram, and imple-mentation features for a sensor network under control of FreeRTOS free real time operating system. The described solution was tested in practice for one of the medical monitoring problems to implement the intravenous infusion monitor. The bene-fits of the solution include adaptability of nodes connections according to the current load, interoperability due to reconfigu-ration, self organization, and the possibility of new nodes to be included themselves and failure tolerance.
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