Hi There, For you case, please check if your chromecast can detect a strong Wi-Fi signal from the adapter? If yes, but it still switch to your main router's Wi-Fi, please forget your main router's...

Hi There, Sorry to tell you that we only have English service, can you repost your problem in English? Merry Christmas.

Welcome to Join TP-Link Forum.

Hi There, TL-WA850RE dones't support WDS mode. Our range extender will create a virtual mac address and comunicate with the router, it's the principle of how it works. Sorry for the inconvinience...

Sorry, could you please ask question in english ,we can only understand english here.Thanks

Welcome