Connecting iOS and Android devices using a WiFi with no internet connection

Question

I have a really huge place in which what I need is that people can chat with each other. I would place WiFi router to cover the whole place but, due to the high amount of people, I can't provide an internet connection through that network. Which technology should I use? I've been reading about AllJoyn but I don't know if that would help me. Also, because of the amount of people (over 75,000) I can't setup a server to handle the service, per connection, 1 devices will have to be the host and the other one will have to be the client. Thanks

Answer 1

If you want to create your own application you could use something like Signalr and Xamarin using their SignalR component.

Taken from the Quick Usage on the component page:

// Connect to the server
var hubConnection = new HubConnection("http://server.com/");

// Create a proxy to the 'ChatHub' SignalR Hub
var chatHubProxy = hubConnection.CreateHubProxy("ChatHub");

// Wire up a handler for the 'UpdateChatMessage' for the server
// to be called on our client
chatHubProxy.On<string>("UpdateChatMessage", message => 
    text.Text += string.Format("Received Msg: {0}\r\n", message));

// Start the connection
await hubConnection.Start();

// Invoke the 'UpdateNick' method on the server
await chatHubProxy.Invoke("UpdateNick", "JohnDoe");

Alternatively there are applications out there that likely do what you want already. For example http://beebeep.sourceforge.net/