Please find the full paper at http://doi.org/10.1145/2836127.2836132. You may cite the paper as below: Kathiravelu, P., Sharifi, L., & Veiga, L. (2015). Cassowary: Middleware Platform for Context-Aware Smart Buildings with Software-Defined Sensor Networks. In 2nd Workshop on Middleware for Context-Aware Applications in the IoT (M4IOT 2015), co-located with ACM/USENIX/IFIP Middleware 2015. Dec. 2015. ACM. pp. 1 – 6. http://doi.org/10.1145/2836127.2836132