An apparatus, and computer program can recognize an IoT device. The apparatus, for example, may comprise at least one processor, and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to receive an indication of an identifier of another apparatus via wireless communication, retrieve an emission pattern, and display a representation of the emission pattern according to a time-synchronization signal, wherein the retrieved emission pattern and the received indication are associated with each other. Similar and related example apparatus and example computer programs are also provided.