Facilitating the interaction of human users and machines with smart devices 
is important to drive the successful adoption of the Internet of Things in 
people's homes and at their workplaces. In this poster contribution, we 
present an approach to support users controlling smart devices in their 
environment. To do this, we propose to embed semantic metadata in the 
representations of smart things. By means of this metadata and a semantic 
reasoning service, our system enables users to specify a desirable state of 
their smart environment and produces a machine-readable description that 
details which steps are necessary to reach this state, where each step 
corresponds to a Web request to a smart device. A client application that 
could, for instance, run on the user's smartphone, can distill the necessary 
steps required to reach the user's goal state from this description and 
execute them to modify the smart environment on behalf of the user.