Ring Spotlight wired camera loose connection

Hi,I've just installed my new Ring Spotlight wired camera. There is no problem with the 220 power and also the wifi connection is permanent. After a few minutes (2-3), the connection is lost. The motion sensor is still working it switch on the lights. If I restart the camera it works properly for another 2-3 minutes and then I lose the connection again. I bought 3 stick Up cams also, they are working properly. What can I try to solve this problem? The router (Tplink DECO M4) is only 1.5 meters from the camera.Thanks a lot in advance!