Description: The prominent visions of wireless sensor networks that appeared about
a decade ago have spurred enormous efforts in research and development of this
new class of wireless networked embedded systems. Despite the significant effort
made, successful deployments and real-world applications of sensor networks are
still scarce, labor-intensive and oftenn cumbersome to achieve. In this article, we
survey prominent examples of sensor network deployments, their interaction with
the real world and pinpoint a number of potential causes for errors and common
pitfalls. In the second half of this work, we present methods and tools to be used
to pinpoint failures and understand root causes. These instrumentation techniques
are specifically designed or adapted for the analysis of distributed networked embedded
systems at the level of components, sensor nodes, and networks of nodes.
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