Internet of Things (IoT) is a rising technology, which is becoming an important building block of information systems in many different areas, including enterprise environments. For IoT to become a part of process-driven enterprise applications, process modelling notations have to be extended. This thesis focuses on introducing a modelling notation for modelling of properties of real-world entities. It also improves the modelling of IoT devices and different communication types used by them. To solve stated problems, we propose six solutions in form of modelling approaches with corresponding extensions to BPMN. Proposed solutions are based upon and evaluated against four sets of identified requirements. Solution, which satisfies the highest number of requirements, is our final solution and is an adequate answer to our research questions.