Pi.Alert or WatchYourLAN can alert you to unknown devices appearing on your WiFi or LAN network
GadgeteerZA · news.movim.eu / gadgeteerza-tech-blog · Saturday, 17 September, 2022 - 14:04
You can self-host these open source apps that will regularly scan the devices connected to your WIFI / LAN and alert you the connection of unknown devices. Pi.Alert has a few extras like warning of the disconnection of "always connected" devices, additional notification options, presence history, and others I show in the video.
In this video I compare these two apps and show what they look like in action, as well as covering some tips and solutions for issues I had experienced.