  In this article we revisit Wireless Sensor Networks from a contemporary
perspective, after the surge of the Internet of Things. First, we analyze the
evolution of distributed monitoring applications, which we consider inherited
from the early idea of collaborative sensor networks. Second, we evaluate,
within the current context of networked objects, the level of adoption of
low-power multi-hop wireless, a technology pivotal to the Wireless Sensor
Network paradigm. This article assesses the transformation of this technology
in its integration into the Internet of Things, identifying outdated
requirements and providing a critical view on future research directions.
