I'd like to know where to start studying to create an App that works on the local network. I have a version of this App that works using Firebase with my online database. I wanted to now do something similar but locally, with Wifi only Wireless LAN, where you can establish socket connections. This should work on any LAN as well. Can you do this using the internal android bank? Like, make one of the devices the server with the database while the others serve as clients? How can I do this to send data as numbers or strings?
Remembering that my goal is to do this between Android Smartphones, without using another PC (notebook and etc.) as a server.
Thank you in advance.