Hi there,
So I have used this method in the past and it works well.
Use Sockets to send and receive data over TCP
Basically you create an endpoint and use sockets to exchange data to an IP and Port(socket).
HTH
GL 
PJ 
fyi, You can make TCP Server or UDP server too. or
Set up an access point
Use the beginAP() function to create an access point without a local WiFi network. The default address for the board in AP mode is 192.168.4.1.