Hard reset TP-LINK AC1750 / Archer C7

Factory reset (Hard reset) Turn on the router and locate the reset button (hole) on the back panel. Press and hold (use a paper clip) for more than 5 minutes and the router will reset. Visit http://tplinkwifi.net to create a new login password.
Firmware Firmware link
Default username N/A
Default password You set it at http://tplinkwifi.net
Default IP address