RealEstateCore ontology, it is designed to provide a standard way of representing smart building components such as sensors, actuators, and devices etc, so you should be good to use it..
The host device, in this case a PC, can be considered an IoT device that harvests data from the network using its NIC, it seems conceptually correct!!! The capability to ingest data can be represented as a property of the requester component with a data type of "byte array" or "string" and this property can be updated when new data is received, right?
You were previously using JSON-LD ,right?, that allows you to represent data as a graph with nodes and edges, which is similar to the way that RDF is used to represent ontologies. Overall, it is important to carefully consider the ontology and the components.
Energy Grid Ontology for Digital Twins is Now Available