Abstract-Smart environment applications have gained a lot of attention and acceptance from the community. For this reason, many design and evaluation efforts target these applications. However, these applications rely on a software architecture that driven by a well-designed middleware. In this paper we propose design and evaluation requirements for smart environment software architectures and demonstrate how these requirements can be met with a simple, lightweight publishsubscribe design paradigm. We describe our CLM middleware that follows these requirements and illustrate its extensive use as part of the CASAS smart home system.
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