TP-link Archer C9 reverse to factory

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Alex58
DD-WRT Novice


Joined: 04 Dec 2018
Posts: 9

PostPosted: Tue Dec 04, 2018 19:58    Post subject: TP-link Archer C9 reverse to factory Reply with quote
Hello Guys,

I have a Netgear R7800 to install DD-WRT but to make this router available need to reverse two Tp-link Archer C9 (ver 1 and v.2) to factory firmware which I could not manage to do so far. Tftp acts like it is loading the stock firmware but in reality it does not. Is there a way to return stock firmware into Archer C9?

Thank you
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Alex58
DD-WRT Novice


Joined: 04 Dec 2018
Posts: 9

PostPosted: Wed Dec 05, 2018 5:42    Post subject: Reply with quote
jxm wrote:
There are instructions in the TP-Link forum, which work for most TP-Link routers:

https://forum.tp-link.com/showthread.php?81462-How-to-recovery-the-router-when-you-bricked-it

Cheers.


Hi, thank you. Yes, I saw such posts but they do not work any more. TFTP starts fine but DD-WRT bootloader ignores non-DD-WRT firmware. TFTP or system upgrade sessions go as if the new firmware file is being loaded and then after reboot you still have DD-WRT. I am hesitating loading DD-WRT into my new Nighthawk as I do not want to make irreversible change in $300 router.

I liked some DD-WRT features like VPN with individual passwords for users), although some others were unstable on Archer C9 (File server and network printer). My stock R7800 has Open VPN and stable file server but the file server requires giving admin password to every user which is unacceptable, It's network printer is also bad because requires installing a piece of software on every computer. I still prefer to stay with this imperfect firmware rather than going with irreversible change until I learn on C9 if there is a way to reload stock firmware after DD-WRT.
egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 12837
Location: Netherlands

PostPosted: Wed Dec 05, 2018 7:58    Post subject: Reply with quote
To ask about the possibilities to reverse a R7800 ask in the Atheros forum.
I have installed a lot of Netgear routers which are easy to reverse to stock but those were all Broadcom based

_________________
Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
Alex58
DD-WRT Novice


Joined: 04 Dec 2018
Posts: 9

PostPosted: Wed Dec 05, 2018 8:34    Post subject: Reply with quote
jxm wrote:
Check out this thread....
https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=981282
(Note the image with pinouts for serial recovery)

Here is some more information that may be useful
https://openwrt.org/docs/guide-user/troubleshooting/vendor_specific_rescue
https://openwrt.org/docs/techref/hardware/port.serial
https://wiki.dd-wrt.com/wiki/index.php/Serial_Recovery

Cheers


Thank you, good information. Unfortunately did not help so far. I downloaded that firmware and loaded it over tftp but DD-WRT still survived. Tried a few more times with hard resets and once I did a hard reset immediately following firmware update it now became bricked. Just flashing all lights slowly like does restart again and again. At least some movement. Will try UART option on the weekend.
Alex58
DD-WRT Novice


Joined: 04 Dec 2018
Posts: 9

PostPosted: Sun Jan 20, 2019 7:04    Post subject: Reply with quote
Just to update: Archer C9 was easily reversed to factory condition over internal serial port using this video: https://www.youtube.com/watch?v=jHONx_yrrKs&feature=youtu.be
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