[SOLVED] WRT32X back to stock Firmware

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sufgi123
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Joined: 17 Apr 2015
Posts: 13

PostPosted: Mon Jul 30, 2018 19:02    Post subject: [SOLVED] WRT32X back to stock Firmware Reply with quote
Hi,
I have Linksys WRT32X
How can I back to factory firmware from dd-wrt ?


Last edited by sufgi123 on Tue Jul 31, 2018 17:01; edited 1 time in total
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spuriousoffspring
DD-WRT Guru


Joined: 05 Apr 2017
Posts: 983
Location: South of Heaven, USA

PostPosted: Mon Jul 30, 2018 23:16    Post subject: Reply with quote
If you haven't overwritten the stock partition you can switch back with the 3x power switch method or via Telnet / SSH commands.
For the WRT32X the commands are:
fw_printenv boot_part
* This will give a 1 or 2
fw_setenv boot_part 1
or
fw_setenv boot_part 2
* Use opposite number returned from first command.

EDIT: I forgot to include that the above commands are for while on the stock OpenWrt Venom firmware.
While on DD-WRT the commands are:
ubootenv get boot_part
then
ubootenv set boot_part 1
or
ubootenv set boot_part 2

If you have overwritten the stock firmware the steps are a bit more complex. This was posted a while back:

ghoffman wrote:
i've spent a number of hours over the past two weeks trying to get dd-wrt on and off a wrt32x. to summarize:

stock -> ddwrt works by gui (flashes other partition) AND by mtd write (summarized above; pick your partition)

stock-> openwrt/lede works by ssh and sysupgrade (probably works by gui but i didnt try)

openwrt -> stock works by ssh/mtd write.

ddwrt -> stock: i had to enable ssh, then flash both mtd5 and mtd7 partions with stock flat firmware file, AND erase nvram partition (mtd erase nvram), then power cycle router. i cant completely explain why, but i think the ddwrt nvram values make openwrt or stock firmware hang, and issing the 'reboot' command at the ddwrt command line re-writes nvram. anyway, only by completely getting rid od ddwrt could i get back to stock.

so: from stock, you can get lede on one partition and dd-wrt on the other.
from dd-wrt: you have to get rid of dd-wrt remanants everywhere to get back to stock or lede.

the quick way to get back to a 'clean' setup is from serial, using the 'run update_both_images' uboot command. i think by flashing both mtd5 and mtd7 with stock, and earsing nvram, this accomplishes the same thing, without serial access.

short story - it's currently hard to get from dd-wrt back to stock, but it can be done without serial access.

_________________
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http://www.dd-wrt.com/phpBB2/viewtopic.php?t=311117

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https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=315569

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FIRMWARE: OpenWrt SNAPSHOT r8217-2cc821e / LuCI Master (git-18.276.41146-280dd33)
MODEM: ARRIS SURFBoard SB8200
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USB NAS: Western Digital BLACK 1 TB Hardrive + Startech USB 3.0 External SATA III Enclosure


Last edited by spuriousoffspring on Tue Jul 31, 2018 4:22; edited 1 time in total
sufgi123
DD-WRT Novice


Joined: 17 Apr 2015
Posts: 13

PostPosted: Tue Jul 31, 2018 2:37    Post subject: Reply with quote
I think I have written over the stock.
Can you explain by details how to back to stock firmware with links to files I need.

Thank you
spuriousoffspring
DD-WRT Guru


Joined: 05 Apr 2017
Posts: 983
Location: South of Heaven, USA

PostPosted: Tue Jul 31, 2018 4:17    Post subject: Reply with quote
I attached the flat stock Venom image. Also here's a link to help with MTD info:
https://wiki.openwrt.org/doc/techref/mtd

I haven't personally tried the aforementioned method. However, I can confirm the attached file does successfully flash via USB-TTL Serial Cable.

Unless you are absolutely sure of what you are doing I would not recommend going any further!

The safest approach may be to wait and see if Brainslayer can add a 'return to stock' feature in one of the next DD-WRT builds.

_________________
DD-WRT Installation & Setup TUTORIAL
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=311117

WRT32X DD-WRT Installation Procedure
https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=315569

IPVanish OpenVPN Client Setup TUTORIAL
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=308565

FIRMWARE: OpenWrt SNAPSHOT r8217-2cc821e / LuCI Master (git-18.276.41146-280dd33)
MODEM: ARRIS SURFBoard SB8200
ROUTER: Linksys WRT32X
USB NAS: Western Digital BLACK 1 TB Hardrive + Startech USB 3.0 External SATA III Enclosure
sufgi123
DD-WRT Novice


Joined: 17 Apr 2015
Posts: 13

PostPosted: Tue Jul 31, 2018 4:54    Post subject: Reply with quote
Thank you for trying helping me.
It's new for me and I need instruction step by step what to do.
spuriousoffspring
DD-WRT Guru


Joined: 05 Apr 2017
Posts: 983
Location: South of Heaven, USA

PostPosted: Tue Jul 31, 2018 5:44    Post subject: Reply with quote
Like I said I haven't verified this for myself and there is a good chance of soft-bricking your WRT32X.
Use at your own risk.

Read the entire thread before you begin

First, enable SSH in DD-WRT GUI Services Tab - Services Sub Tab - Secure Shell Section - SSHd (Enable)

Second, download and install PuTTY and WinSCP (assuming you are using a Windows PC)
PuTTY:
https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html
WinSCP:
https://winscp.net/eng/index.php

PuTTY & WinSCP login credentials:
User Name is always: root
Password is: your dd-wrt admin password

Third, use WinSCP to copy the venom.img (attached to last post) to /tmp on your WRT32X.

Forth, open PuTTY and SSH into router

The commands you will need to enter:

erase nvram
mtd -r -e kernel1 write venom.img kernel1

EDIT: Correct commands are:
mtd -e linux -r write /tmp/venom.img linux
mtd -e linux2 -r write /tmp/venom.img linux2

I highly recommend you get a USB-TTL cable. It is the only way to recover your WRT32X if something goes wrong.
https://www.adafruit.com/product/954

Good Luck!

_________________
DD-WRT Installation & Setup TUTORIAL
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=311117

WRT32X DD-WRT Installation Procedure
https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=315569

IPVanish OpenVPN Client Setup TUTORIAL
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=308565

FIRMWARE: OpenWrt SNAPSHOT r8217-2cc821e / LuCI Master (git-18.276.41146-280dd33)
MODEM: ARRIS SURFBoard SB8200
ROUTER: Linksys WRT32X
USB NAS: Western Digital BLACK 1 TB Hardrive + Startech USB 3.0 External SATA III Enclosure


Last edited by spuriousoffspring on Mon Sep 03, 2018 18:14; edited 1 time in total
sufgi123
DD-WRT Novice


Joined: 17 Apr 2015
Posts: 13

PostPosted: Tue Jul 31, 2018 8:34    Post subject: Reply with quote
Great, Thank you
I will try later
spuriousoffspring
DD-WRT Guru


Joined: 05 Apr 2017
Posts: 983
Location: South of Heaven, USA

PostPosted: Tue Jul 31, 2018 9:03    Post subject: Reply with quote
I just re-read @ghoffman's instructions and I forgot he says to flash both partitions.
After the first commands above you would also need to enter:
mtd -r -e kernel2 write venom.img kernel2

* You will have to copy the venom.img file with SCP again beforehand as it is erased after each reboot.

_________________
DD-WRT Installation & Setup TUTORIAL
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=311117

WRT32X DD-WRT Installation Procedure
https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=315569

IPVanish OpenVPN Client Setup TUTORIAL
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=308565

FIRMWARE: OpenWrt SNAPSHOT r8217-2cc821e / LuCI Master (git-18.276.41146-280dd33)
MODEM: ARRIS SURFBoard SB8200
ROUTER: Linksys WRT32X
USB NAS: Western Digital BLACK 1 TB Hardrive + Startech USB 3.0 External SATA III Enclosure
sufgi123
DD-WRT Novice


Joined: 17 Apr 2015
Posts: 13

PostPosted: Tue Jul 31, 2018 10:40    Post subject: Reply with quote
Thank you
After both commands I should reboot the router ?
or I need to reboot it after each command and do it again for second kernel ?
Can I keep dd-wrt in 1 partition and factory in other, and switch between them ?
spuriousoffspring
DD-WRT Guru


Joined: 05 Apr 2017
Posts: 983
Location: South of Heaven, USA

PostPosted: Tue Jul 31, 2018 10:57    Post subject: Reply with quote
That's what the -r in the command is for. However, if the router does not reboot then just enter the command reboot
_________________
DD-WRT Installation & Setup TUTORIAL
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=311117

WRT32X DD-WRT Installation Procedure
https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=315569

IPVanish OpenVPN Client Setup TUTORIAL
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=308565

FIRMWARE: OpenWrt SNAPSHOT r8217-2cc821e / LuCI Master (git-18.276.41146-280dd33)
MODEM: ARRIS SURFBoard SB8200
ROUTER: Linksys WRT32X
USB NAS: Western Digital BLACK 1 TB Hardrive + Startech USB 3.0 External SATA III Enclosure
spuriousoffspring
DD-WRT Guru


Joined: 05 Apr 2017
Posts: 983
Location: South of Heaven, USA

PostPosted: Tue Jul 31, 2018 11:00    Post subject: Reply with quote
FYI: While on the stock Venom firmware or OpenWrt the command to reset is:
firstboot
reboot

_________________
DD-WRT Installation & Setup TUTORIAL
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=311117

WRT32X DD-WRT Installation Procedure
https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=315569

IPVanish OpenVPN Client Setup TUTORIAL
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=308565

FIRMWARE: OpenWrt SNAPSHOT r8217-2cc821e / LuCI Master (git-18.276.41146-280dd33)
MODEM: ARRIS SURFBoard SB8200
ROUTER: Linksys WRT32X
USB NAS: Western Digital BLACK 1 TB Hardrive + Startech USB 3.0 External SATA III Enclosure
sufgi123
DD-WRT Novice


Joined: 17 Apr 2015
Posts: 13

PostPosted: Tue Jul 31, 2018 14:23    Post subject: Reply with quote
Hi,
I enter "mtd -r -e kernel1 write venom.img kernel1"
and get "Could not open mtd device: kernel1
Can't open device for writing!"

What to do ?
spuriousoffspring
DD-WRT Guru


Joined: 05 Apr 2017
Posts: 983
Location: South of Heaven, USA

PostPosted: Tue Jul 31, 2018 14:52    Post subject: Reply with quote
That could be my mistake.
Try the command this way:
mtd -e kernel2 -r write venom.img kernel2

_________________
DD-WRT Installation & Setup TUTORIAL
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=311117

WRT32X DD-WRT Installation Procedure
https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=315569

IPVanish OpenVPN Client Setup TUTORIAL
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=308565

FIRMWARE: OpenWrt SNAPSHOT r8217-2cc821e / LuCI Master (git-18.276.41146-280dd33)
MODEM: ARRIS SURFBoard SB8200
ROUTER: Linksys WRT32X
USB NAS: Western Digital BLACK 1 TB Hardrive + Startech USB 3.0 External SATA III Enclosure
sufgi123
DD-WRT Novice


Joined: 17 Apr 2015
Posts: 13

PostPosted: Tue Jul 31, 2018 14:57    Post subject: Reply with quote
now I can't connect the router through WinSCP.
I get "The server rejected SFTP connection"

and when I copied the img file, there was no tmp directory, I have made a new one.
sufgi123
DD-WRT Novice


Joined: 17 Apr 2015
Posts: 13

PostPosted: Tue Jul 31, 2018 15:11    Post subject: Reply with quote
I found the tmp directory and do it all again, but still get the error "Could not open mtd device: kernel1
Can't open device for writing!"
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