Hard reset D-Link DIR-825

Known hardware revisions and OpenWRT compatibility
Hardware specifications

Factory reset (Hard reset) Power ON the router. The reset button is the small hole on the back panel – use a paperclip to hold it down for 10 seconds. Release. Wait 30 sec – 1 min for the reboot process to finish.
Firmware Firmware link
Default username admin
Default password [leave blank]
Default IP address