Thank you all for your answers! I am learning a lot..
Nick_Pyner:
This is incomprehensible, not helped by the link you posted being unusable.
Sorry for that, here is the link for the one I am asking about:
Nick_Pyner:
As yet. there is nothing to suggest why you need four Arduinos. Are they remote from each other?
This is an art project, so the reason I am using 4 boards is completely aesthetic. I also meant minimal on how they look that's why 3 of the boards should work as standalone (as I also understood, this board will not need any extra shield or another component to access the WiFi). And no, they are all in the same room and should be connected physically using wires.
I hope this made it a bit more clear, but I am still trying to figure out if what I want to achieve is doable and if there is a tutorial of fetching numerical data from an API and send it to another board or directly to the PC.