ization of domain-specific programming abstractions for wireless sensor actor networks can greatly ease application development. A high level of abstraction from underlying system complexity fosters fast prototyping and less erroneous source code. However, especially in this domain access to low-level parameters can be mandatory to allow for sophisticated application fine-tuning. In this paper, we present a layered system access interface we developed for our middleware platform FACTS to address this challenge. Context-based configuration and control of system-level resources is facilitated by relying on lean additions to the FACTS framework. These will be discussed with the help of a common use case to illustrate the simple, rful abstraction provided. Categories and Subject Descriptors C.3 [Special-Purpose and Application-Based Systems]: Real-time and embedded systems General Terms Design Keywords Wireless Sensor Actor Networks, Middleware, Layered System Access
Kirsten Terfloth, Jochen H. Schiller