OK, so after some struggles, I managed to connect my router (not TP-link) with my device EAP615 Wall. after some time I managed to make internet work. Nonetheless I want to change the names of...

@d0ugmac1 thank you very much! I found the new device and bought it!

@d0ugmac1 thank you for all support and advice. it looks like my device burnt out. Maybe you can recommend similar range extender that doesn't need electric socket ? I have my device on the ceiling...

@d0ugmac1 how could i do that? i understand that my wifi router is the power source. correct? I don't have an alternative

@d0ugmac1 It goes from my wifi router. Maybe there's some problem with the cable, but I checked it three times. everything should be working :( can it be that something happened with the extender?

Hello, i have EAP225-Wall at my home and it was working perfectly until one day electricity was gone for a day and internet connection as well. After the electricity got back and internet was fixed...