Re: The connection with EA Online was lost PS4 Battlefield 4

@IDFWU1337, If you have multiple PS4 on the same local LAN, it is actually best always to have all of them wired all the way if possible!

But as also remarked above by @dustin_fools96, make sure you set them up with a dedicated IP address in your Router config page.  That in itself will make your connection line very solid and even local small bursts on the LAN will not disturb your gameplay, as the router will then keep your PS4 assigned to same end-IP number and the EA network will then not think you bailed off and kick your line to them.

The fiddle WiFi connections does typically give frequently the EA Connection Lost error message, as just a few millisecs off the network with a few data packages disturbed and the EA network will kick you off with that specific message given.