I am using an arduino with the official arduino ethernet shield. If you have an EthernetServer that has multiple EthernetClients how do you distinguish between the clients? Can you compare the existing client to server.available to determine if it is an existing connection?
Right now, I can allow a client(s) to connect, evaluate the request, send data back to client and then stop the client connection. However, I want to be able to send data back to the client at a later time.