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Wireless Sensor Networks (WSNs) consist of networks composed of tiny devices equipped with sensing, processing, storage, and wireless communication capabilities. WSN nodes have limited computing resources and are usually powered by batteries. First generations of WSNs were designed to attend requirements of a unique target application usually with a single user, who was also the infrastructure owner. However, the rapid evolution in this area and the increasing of the complexity of the sensors and applications pose new challenges to WSN solutions, which can be addressed by specific middleware platforms for these networks. Existing middleware systems provide suitable mechanisms to define the high-level application logic and to deal with heterogeneity and distribution issues of WSN, but most of them do not provide explicit mechanisms to define the underlying autonomic behavior of the system, an …