I might have bricked my router (again ) . However at the moment I don't have access to a serial console to fix it.
According the the "power" LED I should have gotten the device into "failsafe mode". Its flashing faster then normal. Trying to SSH into the router still gives me "connection refused". Of course I messed up Luci in the process so I'm only getting "bad gateway" over http.
It´s not death. It works, in the sense that it hands out IP over DHCP and I can access the internet on the WAN side.
Any suggestions, besides get a serial cable?? It doesn't seem to have the TFTP option in its bootloader.
some additional info: I flashed my own build. Same build enviroment as I´m using with my MT76xx devices, but I wanted to try my TP Link routers as well.
The same "side effects" I had on an Archer C7 v4, but that one is recoverable over TFTP. My MT76xx builds never showed this behaviour...