I need to have a LAN based client/server communication, where either of client/server can send/receive message (event) to/from other client/server( something like LAN messenger). Client (phone/tablet) will send some message to server, server will send it to a particular client (phone/tablet)
Basically its a restaurant app with tablet on each table, user will book order using tablet. At some point server need to send some trigger to a particular table tablet to play some promos.
Any recommendations for 3rd parties in this regard?