The w-iLab.t testbed includes both a wireless mesh and a sensor network infrastructure, which can interact with each other, making it possible to test advanced scenarios such as using the mesh network as a backbone for the sensor network. It is deployed in an office building of 18x90m and is spread out over three floors. It consists out of 200 node fixed locations at the imec office premises, including meeting rooms, classrooms, offices and corridors. The w-iLab.t testbed is centrally managed for control and monitoring purposes. It supports easy configuration and deployment, including installation of new software, protocols and middleware components via an intuitive web-based interface.