Since my router TPLINK WR841ND v8 apparently is bricked as per the disscusion had in here https://forum.openwrt.org/viewtopic.php?id=72064 and my LAN1 port is not working to try the debricking process without serial, I think my last option is to try to debrick it using the serial port.

As I don't have the appropriate cable right now but I do have an extra router (WR741ND v4.21), I was thinking to follow the steps described in https://wiki.openwrt.org/doc/hardware/p … _a_console to get access to the malfunctioning router through the router that's working OK. Once connected, I would try to debrick it with the steps described in https://wiki.openwrt.org/toh/tp-link/tl-wr841nd#v7 for v7, since for v8 is available only without serial cable.

So I will connect the routers between them through serial port, and then I will connect my PC to the working router through RJ45. Then I will execute all the commands from a telnet window from my PC:

Could anybody tell me if that is feasible to do and that there is no risk to damage the working router?
How should I connect the routers through the serial port? RX with RX, TX with TX or RX with TX and TX with RX? Should the other pins connected as well?
Are the instructions described in https://wiki.openwrt.org/toh/tp-link/tl-wr841nd#v7 suitable for v8 as well?

Thanks for any help you could give me. I will really appreciate it.

(Last edited by Jwaynw on 15 Sep 2017, 04:41)

Do yourself a favour, get the proper ttl level usb serial cable, it saves you a lot of trouble. Keep in mind that your working router uses its very own serial port for its console messages - thereby causing quite some problems for the broken device (and freeing ttys0 up completely, bootloader, kernel and userspace needs quite some additional effort and breakage potential); this would be a different case if one of the devices at your disposal (e.g. a SBC) would offer a usb port which doesn't double up as console.

(Last edited by slh on 15 Sep 2017, 08:04)