Method for identifying external device by registering features of EM signal and electronic device applying said method

An electronic device, comprising:

• an input device;
• a display device;
• a communication module;
• an electromagnetic (EM) sensing circuit configured to obtain an EM signal;
• at least one processor operationally connected with the input device, the display device, the communication module, and the EM sensing circuit;
• a memory operationally connected with the processor;
• and
• a device registering unit operationally connected with the memory,
• wherein the memory stores instructions, when executed, causing the at least one processor to:
• obtain an EM signal from an external device, using the EM sensing circuit;
• apply the obtained EM signal to a feature extraction model to extract feature data;
• store information mapping the external device and the electronic device in a database included in the memory;
• register an associated service with an external device identified based on the feature data
• store the extracted feature data together with information associated with the external device;
• identify the external device based on feature data with the highest similarity with the feature data of the EM signal between the extracted feature data;
• and
• display candidate devices, similar to the extracted feature data.