I am creating a game in Unity and I would like to create an ability for players to join the game that others have created on the same wifi. I would like it to be as effortless as possible(e.g. players don't have to find out their wifi, etc). The game is cross-platform - you could have one player on PC, other on Android device, etc.
Now I know that there is a game that has similar mechanism to what I would like to achieve: SpaceTeam. Basically you select whether you use BT or wifi, and wait for other players to join.
How can I do this in Unity, or something similar that satisfies my needs?