Hey guys, I just got this router and wasn't happy with the speeds i got and decided to flash openwrt, which ran like a charm via FW upgrade in the stock UI, used 18.06.2 factory, not upgraded.
Opened up the interface and couldn't get it to connect ( I use a PPoE connection ) via WAN and like the idiot I am, i set the LAN as PPoE and after it restarted, I couldn't open the interface via 192.168.1.1
Is the Failsafe my only chance now? I don't know how to work with such software, any recommendation would be welcome.
I would like to restore it to stock and try connecting it again, if it doesn't work, I'd flash the OEM FW and return it to store, I doubt I can return it in this state.
As you want to reset everything anyway, do a pushbutton reset. Allow OpenWrt to boot up fully. Press and hold the reset button for at least 5 seconds then release. After a few seconds all the lights should blink off and the router reboot (this reboot will take longer than normal). It will then have default settings.
I did reset an Archer C7 v5 once and when I remember right the router will just reboot and load the old config if the reset button isn't pressed long enough.
Usually this works flawlessly. In your case I would try to reboot the router one last time(without a reset) and if there isn't any change you still can try to reinstall the firmware via TFTP.