You should be able to use a browser and log in to your WiFi router as admin. There you should be able to see devices connected to your local network.
By MAC ID or IP address.
Your devices will also show their NetBIOS name or Network ID, which will depend on your router. (My Harmony Hub shows up as Slim Devices Inc on my old Airport Extreme router, and as the proper name on my ASUS RT-AC88U).