I'd like to do a project. Here is the idea, In a class room there are 4 members with their arduinos. I'd like to connect the 4 members in a network and these guys can establish network connection with whomever they want and they can communicate(like chat). I want to build a social network between these arduinos using ethernet. I did some basic ethernet programs. Help me with some tutorials,books,anything that is useful for this project.Thanks...!!
What do you expect to happen, when all users send something at the same time?
You'll need at least one server, which manages the communication.
Bluetooth may be a good starting point, with most networking issues handled on board or in available libraries. Then decide what data (commands, text?) could be sent, and how the receiver should react upon receipt.
A HTTP web based communication setup might be of use. If a server is tied up doing something, the client will wait a little while for the connection to make. The server will handle the client request in turn. You might be able to use the serial monitor as the user interface.