WR841N(D) V7 USB 2.0 Mod

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Btc
DD-WRT User


Joined: 26 Feb 2009
Posts: 56

PostPosted: Tue Oct 11, 2011 18:06    Post subject: Reply with quote
I thought at first it could be an easy task. Correct me if I am wrong, I guess WR1043ND and WR841ND are very similar and it would be just a matter of "copy/paste" modules as they would be cross-compatible. Or I am terribly wrong as these routers are only lookalike?

One thing I find quite difficult is finding the application binaries for routers like WR841ND, I mean, on Broadcom routers you can find them everywhere to download and/or extract them from a mega build using the firmware modkit just as easy.

And also, you say that dd-wrt wouldn't waste time trying to support a mod that 1/10 of the people would be capable to do, so what about the SD/MMC card mod on WRT54G? I guess it has a close level of difficulty. So, I don't think it is ridiculous.
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gregrice
DD-WRT Novice


Joined: 06 Dec 2011
Posts: 4

PostPosted: Thu Dec 08, 2011 15:01    Post subject: Unable to enumerate USB device on port 1 :( Reply with quote
Hi all!

First is want to say thanks Simon for providing us this cool mod!
But i have a little issue with it, altough i followed the process to the letter.

You can see on the attached pictures my device, which is a WR841N v7.2



I think i have soldered good the data+/-, and haven't cut or short anything around the resistors (made under magnifying glass).

Measured the voltage of the regulator made with L7805, 470uF condensator and a 100uF condensator, and it seems a fix 5.02V.

But when i connect any USB device to it (tried already with a 16Gb Kingston pendrive, 60GB External 2,5" HDD, 500Gb External 3,5" HDD (with external power supply, external USB 4port HUB) i get this dmesg output,
no matter which firmware using:
Code:

usb 1-1: new high speed USB device using ar71xx-ehci and address 2
usb 1-1: device descriptor read/64, error -71
usb 1-1: device descriptor read/64, error -71
usb 1-1: new high speed USB device using ar71xx-ehci and address 3
usb 1-1: device descriptor read/64, error -71
usb 1-1: device descriptor read/64, error -71
usb 1-1: new high speed USB device using ar71xx-ehci and address 4
usb 1-1: device not accepting address 4, error -71
usb 1-1: new high speed USB device using ar71xx-ehci and address 5
usb 1-1: device not accepting address 5, error -71
hub 1-0:1.0: unable to enumerate USB device on port 1

Full dmesg output

If you take a look at the full dmesg output you could that - i think - the usb port is properly recognised, but somehow because this error i cannot mount or use anything

Already tried with the firmware what posted by Simon,
and ANOTHER from the openwrt forum, which is
compiled for directly to the v7 series of wr841n.

Has anybody meet with this problem before?

There must be some solution out there, because without the usb i cannot use the features of the openwrt with a few Kbytes of free space :'([/url]

SOLVED


Last edited by gregrice on Wed Dec 21, 2011 7:51; edited 1 time in total
gregrice
DD-WRT Novice


Joined: 06 Dec 2011
Posts: 4

PostPosted: Thu Dec 15, 2011 17:02    Post subject: Reply with quote
Can somebody measure the value of R674?
It's located next to R601.
I think i've fried it, this is causing my issue maybe :S
Simon94
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Joined: 24 Jul 2009
Posts: 31

PostPosted: Fri Dec 16, 2011 22:05    Post subject: Reply with quote
I dont know, my Multimeter only shows crazy values... Which resistance has it on your board? I guess it must be something between 2,5 and 15k..


Whats the resistance between D+ and D- when Device is powered off?

Maybe D-/D+ are wrong soldered? (D+ on D- and D- on D+ haha)
gregrice
DD-WRT Novice


Joined: 06 Dec 2011
Posts: 4

PostPosted: Wed Dec 21, 2011 7:48    Post subject: Reply with quote
Simon94 wrote:
I dont know, my Multimeter only shows crazy values... Which resistance has it on your board? I guess it must be something between 2,5 and 15k..


Whats the resistance between D+ and D- when Device is powered off?

Maybe D-/D+ are wrong soldered? (D+ on D- and D- on D+ haha)


Replaced with a 15k resistor and seems like it was good, because everything is working now!

Thanks!
2of1
DD-WRT Novice


Joined: 24 Dec 2011
Posts: 3

PostPosted: Sun Dec 25, 2011 15:28    Post subject: Reply with quote
Simon's rapidshare link no longer works.
Could someone please post the latest firmware binary?
Thanks!
gregrice
DD-WRT Novice


Joined: 06 Dec 2011
Posts: 4

PostPosted: Sun Dec 25, 2011 22:40    Post subject: Reply with quote
2of1 wrote:
Simon's rapidshare link no longer works.
Could someone please post the latest firmware binary?
Thanks!


The latest bin from Simon was on megaupload, not rapidshare.
Anyway i've uploaded here: http://www.multiupload.com/5K4UHKIHF9
But please verify the checksum before you flash it:
Code:
2cd9669bac62f0d7ac651443bae4656d
Simon94
DD-WRT Novice


Joined: 24 Jul 2009
Posts: 31

PostPosted: Fri Jan 06, 2012 16:49    Post subject: Reply with quote
Come on Guys - No need to use my old build!!

Just use the mr3420 build from http://downloads.openwrt.org/snapshots/trunk/ar71xx/ .


Dont forget to flash this over TFTP, because the signatures arent identical.
Delart
DD-WRT Novice


Joined: 30 Jun 2010
Posts: 4

PostPosted: Sat Jan 07, 2012 23:38    Post subject: Reply with quote
Sorry for offtopic

Or you can wait for dd-wrt for new 842ND model. Sales was started recently in Europe. Just got one on test right now together with 2543ND.

MrDeth
DD-WRT Novice


Joined: 29 Jan 2012
Posts: 1

PostPosted: Sun Jan 29, 2012 14:16    Post subject: Reply with quote
Simon94 wrote:
You can´t flash it via Factory Webinterface because the header of the image isn´t correct.

Flash it directly via TFTP.

Or use the following steps:

First flash this
factory image via Factory webinterface.

Then just upgrade with the sysupgrade command to my build.



can you explain in detail how to flash an image via non TFTP ?
i make USB mod, but i don't have see in log any log when i connect my usb stick ...
can you help ?
DrStein
DD-WRT Novice


Joined: 19 Feb 2011
Posts: 12

PostPosted: Wed Feb 29, 2012 9:27    Post subject: Reply with quote
Simon94 wrote:
Come on Guys - No need to use my old build!!

Just use the mr3420 build from http://downloads.openwrt.org/snapshots/trunk/ar71xx/ .


Dont forget to flash this over TFTP, because the signatures arent identical.


I found out an easier way: first flash WR841N-squashfs-factory via stock webGUI then flash MR3420-squashfs-sysupgrade using mtd command via ssh or telnet.
mirek550
DD-WRT Novice


Joined: 21 Apr 2012
Posts: 1

PostPosted: Wed Apr 25, 2012 4:47    Post subject: Help Reply with quote
Hi

I have problem witch 602 resistor because i lost it...
Now i have new one but i recognized only gnd side and i dont know were i can solve second side....
Can somebody check for me were can i solve that 602 resistor please ??? I dont know what to do Sad

Sad careless...
chris19
DD-WRT Novice


Joined: 05 May 2012
Posts: 1

PostPosted: Sat May 05, 2012 11:22    Post subject: Serial access Reply with quote
Hi,

I know this topic is about USB mod for 841nd, but didn't found topic about the serial access to this board.

As seen the picture on the first post I removed R613 and bridged C496. I used CA-42 cable... but I can't access the router via serial. The cable is working, because I used it yesterday for a ASUS WL-520GC.
I tried to switch TX and RX, but nothing...

My router is WR841ND v7.2.

Is there any method to debug?
MasterGipy
DD-WRT Novice


Joined: 29 May 2012
Posts: 1

PostPosted: Tue May 29, 2012 14:51    Post subject: Reply with quote
Anyone could re-up the build please?
mer
DD-WRT Novice


Joined: 12 Mar 2011
Posts: 1

PostPosted: Tue Jul 10, 2012 21:05    Post subject: Reply with quote
I have big problem!

I broken the r602 resistor with pads....

Router works but i don't have usb, Somebody know a other point on the usb mod in the v7.1 board?
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