Hey @J-M-L @hzrnbgy thanks so much for your quick replies.
I was thinking that Wifi would be the best choice. It's the HOW that I am being stuck at mostly. Should the app on the computer run a WebClient and the Arduino Boards be programmed as WebServers?
I forgot to mention something important, I need the data in realtime at a rate of around 10 times per second. Would this be a problem with the above solution?
While continuing to search for ways to creating a communication between my Arduino board and computer, I found that OSC could be a simple and very good solution since it works with devices that are connected to same network. I will look into this.
@hzrnbgy OSC can use the UDP protocol, so I think I am heading to somewhere close to what you suggested 
The image above shows the parameters of the OSC_In node in TouchDesigner.