We describe the initial process of eliciting requirements for an Internet of Things (IoT) application involving a hospital emergency room. First, we discuss the process of modeling IoT systems through Rich Pictures and Use Cases. Then, we demonstrate how these can be used to model emergency room systems. Then we create Use Case models for a particular situation - a patient potentially suffering from a myocardial infarction. Finally, we discuss generalization of the specific case to a broader hospital wide system. We believe that such an approach can lead to increased efficiency, increased safety, and better tracking of people, equipment and supplies.
Keywords: Internet of Things; healthcare; requirements elicitation; use cases.