Install DD-WRT on WRT1900ACS V2

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oliver44
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PostPosted: Fri Jan 14, 2022 4:50    Post subject: Reply with quote
I had no problem upgrading to ddwrt from the linksys software interface !

wrt1900acs v2

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saphirely
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PostPosted: Wed Feb 09, 2022 0:21    Post subject: Reply with quote
I bought a WRT1900ACS(?) with dual partition openwrt 21.02.1 in Canada recently.
I hope to write another partition DDWRT, and keep current one partition OpenWRT, is it possible?

I confused which folder should be correct for me under https://.../betas/2022/02-05-2022-r48296

The label bottom is [code]
Model No. WRT1900ACS
8840-00073
Rev A00
FCC-ID Q87-WRT1900ACV2
IC 3839A-WRT1900ACV2[/code]

I checked CPU info in openwrt 21.02.1, it is 1.6Ghz dual-core, and 512M memory with 128M flash space.
blkt
DD-WRT Guru


Joined: 20 Jan 2019
Posts: 5660

PostPosted: Wed Feb 09, 2022 6:35    Post subject: Reply with quote
If Model No. listed on bottom label of the router in the upper right is WRT1900ACS (and no V2) you have V1.
Ignore all the FCC ID and IC info. /dd-wrtv2/downloads/betas/2022/02-09-2022-r48305/linksys-wrt1900acs/

Highly recommended to have DD-WRT on both partitions as they share the same nvram configuration space.

Safest route is to flash factory stock Linksys firmware and use stock firmware environment to flash DD-WRT.
Or try what dkfusion did with factory-to-ddwrt.bin and openwrt webui, just be prepared for a serial recovery.
saphirely
DD-WRT User


Joined: 13 Dec 2020
Posts: 266

PostPosted: Mon Feb 21, 2022 0:27    Post subject: Reply with quote
Thank Mr. blkt.

Also I checked with service-staff from linksys.com then confirmed my device is ACSv1, because it is different with the previous owner's word.
I confirmed and have been enjoyed that only DDWRT is so delicated that seperated ACSv1 and ACSv2, my goal is that let higher performance CPU (true ARMv7) work stable instead of Netgear R6250 which CPU is over 82 °C

Before goodbye with openwrt, I have tested three versions 21.02.1, and 21.02.2 just released on Feb18 2022, and divested-wrt-snapshot-r18807+10-7fae1e5677-mvebu-cortexa9-linksys_wrt1900acs-squashfs-factory.img, I am not satisfied with all of them because of losing WiFi5GHz frequency,

Quote:
Safest route is to flash factory stock Linksys firmware and use stock firmware environment to flash DD-WRT.
Or try what dkfusion did with factory-to-ddwrt.bin and openwrt webui, just be prepared for a serial recovery.


Yes, I have returned the stock firmware FW_WRT1900ACS_1.0.3.187766_prod.img successfully, I did not equip an USB-TTL cable.
How ever, I flashed factory-to-ddwrt.bin 02-20-2022-r48402 over the stock twice, it failure then return stock interface..

Is there something wrong? I guess the factory-to-ddwrt.bin should be .img ?
Because no problem if I try to flash with openwrt-21.02.1/2-mvebu-cortexa9-linksys_wrt1900acs-squashfs-factory.img then openwrt-21.02.1/2-mvebu-cortexa9-linksys_wrt1900acs-squashfs-sysupgrade.bin.

Or can I flash just on openwrt with
Step1: scp factory-to-ddwrt.bin root@192.168.1.1:/tmp
Step2: sysupgrade -n -v /tmp/factory-to-ddwrt.bin ?

Maybe the new size of 02-20-2022-r48402 is too big to fill, so I downloaded the very old version you mentioned, it works.
After download Jan-07-2018-r34411-factory-to-ddwrt.bin and Jan-07-2018-r34411-ddwrt-linksys-wrt1900acs-webflash.bin, flash suceed.
Then flash 02-20-2022-r48402-factory-to-ddwrt.bin and 02-20-2022-r48402-ddwrt-linksys-wrt1900acs-webflash.bin, Great!

Router Model Linksys WRT1900ACS
Firmware Version DD-WRT v3.0-r48402 std (02/20/22)
Kernel Version Linux 4.9.302 #3113 SMP Sun Feb 20 13:12:29 +07 2022 armv7l

CPU Model Marvell Armada 385
CPU Features VFP VFPv3 NEON VFPD32 EDSP FASTMULT HALF TLS THUMB
CPU Clock 1600 MHz
Load Average 0.03, 0.01, 0.00
Temperatures CPU 72.2°C / WL0 46.0 °C / WL1 47.5 °C

Memory Free 420404 KiB /511840KiB 82%

NVRAM 27KiB/128KiB
JFFS2 90.11KB/30.06MB

Thank BS team.

Is it possible to put shutdown in /usr/sbin ?
[/quote]
blkt
DD-WRT Guru


Joined: 20 Jan 2019
Posts: 5660

PostPosted: Mon Feb 21, 2022 9:30    Post subject: Reply with quote
It is a known issue, factory stock Linksys firmware cannot handle factory-to-ddwrt.bin somewhere over 32MB.

You did the right thing to go back to factory stock Linksys firmware, though -F -n -v might have worked YMMV.
recox
DD-WRT Novice


Joined: 20 May 2022
Posts: 1

PostPosted: Fri May 20, 2022 10:21    Post subject: Reply with quote
likeyea wrote:
dkfusion wrote:

The current stock firmware that is installed is 1.0.3.187766


I had this happen with a 1200ac v1.

Flashing the latest factory-to-ddwrt resulted in the linksys interface claiming it succeeded, but then it would boot back to stock.

...

I read in another thread (which i can't find again) that it has to do with that version of stock firmware not liking the newer dd-wrt bin files.

the solution was to do the first install from oem interface with an older factory-to-ddwrt version. I used r34315, and then upgraded that to latest webflash, and that worked for me. Ymmv

I'm running r47942 at present.


I had the same problem. I couldn't change the firmware through the default linksys interface, I had errors with wherever version

Reading this
https://www.reddit.com/r/DDWRT/comments/cjy8f4/cant_flash_linksys_wrt_1900_ac_router_with_ddwrt

I noticed one guy that says about images more than 30mb.
Then I read this post with someone who first installed OpenWRT (which is 10mb the image) and it worked.

Then I installed the version 36247 (first the factory-to-ddwrt.bin and then ddwrt-linksys-wrt1900acsv2-webflash.bin)

And it was working fantastic.

After this I installed the latest version 44715 (first factory then webflash) and now I got the latest firmware for the WRT1900ACS v2


I hope it helps someone.
the-joker
DD-WRT Developer/Maintainer


Joined: 31 Jul 2021
Posts: 2146
Location: All over YOUR webs

PostPosted: Fri May 20, 2022 10:52    Post subject: Reply with quote
recox wrote:
I noticed one guy that says about images more than 30mb.
Then I read this post with someone who first installed OpenWRT (which is 10mb the image) and it worked.

Then I installed the version 36247 (first the factory-to-ddwrt.bin and then ddwrt-linksys-wrt1900acsv2-webflash.bin)

And it was working fantastic.

After this I installed the latest version 44715 (first factory then webflash) and now I got the latest firmware for the WRT1900ACS v2


I hope it helps someone.


Version 44715 is a two year old version, not even close to latest.

See http://ftp.dd-wrt.com/dd-wrtv2/downloads/betas/2022/ for latest builds adn Im sorry to tell you that since 44715 is too old, you will need to nvram reset after flashing current supported build and reconfigure from scratch due to the massive ammount of changes to dd-wrt since two years ago.

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blkt
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PostPosted: Sat May 21, 2022 3:06    Post subject: Reply with quote
No need for OpenWrt, reddit provided examples (2017 to early 2018). Suggest r34411, works every time.

Then webupgrade to a current 2022 dd-wrt build. Telnet or SSH as username root nvram erase && reboot.
the-joker
DD-WRT Developer/Maintainer


Joined: 31 Jul 2021
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Location: All over YOUR webs

PostPosted: Sat May 21, 2022 13:53    Post subject: Reply with quote
@recox

You also dont need to flash the factory to dd-wrt and then the webflash.

The factory to dd-wrt already installs the given DD-WRT version assuming you're using stock firmware to begin with.

The webflash is ONLY to upgrade an older dd-wrt version to a newer version of dd-wrt via the web interface.

You shouldn't use the webflash for anything else but flashing via web interface to upgrade dd-wrt to dd-wrt.

In contrast, the factory to dd-wrt image can be used for e.g. for recovery but never as a upgrade anything or as its main usage to flash stock to dd-wrt.

You should also NEVER go from OpenWRT to DD-WRT or vice versa, this means from specific 3rd party FW to different 3rd party firmware. BIG no no.
What needs to happen is using a stock firmware that doesn't lock 3rd party fw from installing or imposes some other restrictions.

I hope you haven't been digging yourself a hole by just doing whatever reddit says.

that said, you are using a two year old version like I said previously.

Use the latest build on http://ftp.dd-wrt.com/dd-wrtv2/downloads/betas/2022/ ONLY for upgrading dd-wrt to dd-wrt ONLY and forever.

And dont forget to nvram reset after upgrade and re configuring from scratch.

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blkt
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Joined: 20 Jan 2019
Posts: 5660

PostPosted: Sun May 22, 2022 4:55    Post subject: Reply with quote
Reddit is correct, you need to install an older factory-to-ddwrt under 32MB. It's the entire point of this thread.

A well known Marvell issue, workaround recommend first 2018 build factory-to-ddwrt before current webflash.
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