I don't think C7 V2 will have a new interface

lange945 wrote All the firmwares i tried came from the official site. I tried all the versions I could find. None of them work. Wi-Fi Powerline extender is composed of two parts: powerline adapter...

seems no app for this function

have you tried to change a different cable ? Suggest also check the link speed on your PC or test with other PC

have no ideal, better check the compatibility list: http://www.tp-link.com/en/comp-list.html

nope