Arduino Uno WiFi Broadcasting Issues

Yes but I want them to communicate without server

You still didn't specify what kind of messages you want to send.

Emnatz:
Yes but I want them to communicate without server

How can that be possible? AFAIK one of the devices has to act as a server and an Access Point so that the others can communicate with it.

...R

There's WiFi P2P, but I don't know how well supported it is.

You can have an action point / station configuration without necessarily having a client / server configuration in the transport layer.