connecting to multiple peers over wi-fi

I have to implement wifi connection with more than one device at a time. In the current example, if i am connecting any two peers, data can be exchanged between them but 开发者_如何学Gothose devices are no more available in other devices. I want to implement something like server-client over wifi. In which server can communicate with all and client can communicate with server. All simultaneously. It is something like this post

I want to know is it possible to connect with more than 1 device simultaneously over wifi? If yes, then what is the maximum number of devices that can be connected in same pattern?