TP-LINK TL-WR740N v4

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HipHopBlond
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Joined: 26 Nov 2011
Posts: 42
Location: Sofia, Bulgaria

PostPosted: Sat Feb 04, 2012 4:39    Post subject: !?oO Reply with quote
Hello guys I have 3 ddrt routers but the most recent I bought states that the hardware version is WR741N v4.3 Can I do something to help so the build gets released faster? Rolling Eyes
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dabyd64
DD-WRT User


Joined: 27 Sep 2011
Posts: 112

PostPosted: Thu Feb 09, 2012 11:51    Post subject: Reply with quote
Hi, nothing new yet?
Openwrt may be all opensource but is a lot buggy. We need DD-WRT ! Embarassed
Bovoro
DD-WRT Novice


Joined: 13 Feb 2012
Posts: 2

PostPosted: Mon Feb 13, 2012 1:44    Post subject: Reply with quote
dabyd64 wrote:
Firmware from wr703n works perfect on wr740n.
just keep in mind that you won't have USB unless some kind of mod is applied like this:

http://www.zhigao5191.com/computer-network/tp-link740nv5luyouqiguauyinusbkou.html

Finally I got repeater working..but flashing the wr-703n firmware. Wink
Althought it is in chinese, I tried to translate it.

I unpacked the squashfs and extracted it..then tried to translate. There are 120 webpages + 66 help pages = total of 186 pages to translate.
I tried with Chrome's translator but it broke the code in most pages.
They'll show in english in the router, but buttons and few other things won't work as usual.

She only way is manual editing each file's HTML code.

if anyone is interested, here are the squashfs files.
The files to translate would be in:
/web/userRpm (main pages)
/web/localiztion (error strings and other stuff)
/web/help (help pages)


Maybe we can do a "translate team" and distribute the work.

As far as I know this is the only firmware for 4MB ar9331 boards that support repeater mode.


You think that firmware fit on a WR741ND V4 ? Is the same chipset as wr703 , i tried to flahs via web, but no success, error 1800 bad filename
nebbia88
DD-WRT User


Joined: 08 Mar 2010
Posts: 174

PostPosted: Mon Feb 13, 2012 8:40    Post subject: Reply with quote
dabyd64 wrote:
Openwrt may be all opensource but is a lot buggy. We need DD-WRT ! :oops:


this is EPIC :shock:
dabyd64
DD-WRT User


Joined: 27 Sep 2011
Posts: 112

PostPosted: Mon Feb 13, 2012 16:21    Post subject: Reply with quote
Really, all I tried to make openwrt work as repeater leads to topic "issue with ...." which leads to new bug topics.
I am not a linux programmer nor a system designer. I didn't know that I'd need so to just make it work as repeater.
*edit* I finally got openwrt running as repeater (using relayd). It was hard at first, a lot of reading...


-How to flash firmware over Bootloader-

Valid for TPLINK WR-703N and WR740N v4.



This is valid to flash any firmware you want, but also to recover from bad firmware flashing too!!
(If you didn't damage the bootloader itself, which is very strange to be flashed with common firmwares)

Tested firmwares are 740n v4, 703n,openwrt(choose "Factory" file, not "SysUpgrade"!), and DD-WRT (choose "factory-to-ddwrt" , don't use webflash version).



Things you'll need:

Quote:
Terminal(putty, teraterm, hyperterminal, that's your choice)
Tftpd32: http://tftpd32.jounin.net/
firmware (in .bin format)
Ethernet cable
Solder and soldering iron
Thin cable
Serial adapter


STOCK FIRMWARE FOR 740N V4:
http://www.tp-link.es/Resources/software/TL-WR740N_V4_111130.zip
Uncompress and use the file:
wr740nv4_en_3_12_11_up(111130).bin



You have to solder a serial port like here:




Sorry for the mistake. RX and TX are reversed!


If you can read the console but you can't write anything, and you are sure that the soldering is well done and the cable is working, then try this fix.


Once you got the serial, open a terminal with this settings:
Quote:

115.200 baud
8 bit data
1 bit stop
no parity
no flow control


Don't worry about Tx and Rx pins.
Obviously router's RX goes to computer's TX, and so on. But if you get them reversed you won't break anything.
If you don't see anything on console, maybe they are reversed, so try swapping them.

Power on the router and you will see the console booting up.
You will see
Quote:
Autobooting in 1 seconds

That means that the bootloader waits for you 1 second before continue loading.
So you must power on and type "tpl" as soon as you see anything in the console, to enter the command line.
Quote:
tpl


If sucess you will be in command prompt:
Quote:
hornet>


Now, connect an ethernet cable betweeen your computer and the router, any port will be ok but NOT WAN port.
Configure IP address in ethernet interface of computer as:
Quote:
IP address: 192.168.1.100
Subnet mask: 255.255.255.0
gateway: blank
dns1: blank
dns2: blank


Copy "firmware_file.bin" file from into tftpd32's folder. (you can flash any compatible firmware, but in must be in .bin format!)
Now open TFTPF32.

Now, in the bootloader shell, type this and press enter:

Quote:
hornet> tftpboot 0x81000000 firmware_file.bin


(you have to put the same name as the file you copied in TFTPD32's folder)
Then you will see it downloading the file:
Quote:

eth1 link down
dup 1 speed 100
Using eth0 device
TFTP from server 192.168.1.100; our IP address is 192.168.1.111
Filename 'firmware_file.bin'.
Load address: 0x81000000
Loading: #################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
#################################################################
######################################################
done
Bytes transferred = 3932160 (3c0000 hex)


It should put "3c0000 hex" at the end , check it!!
Otherwise DO NOT continue, a bigger file may overwrite your router factory calibration data and you won't be able to recover them.
At this point, don't worry if it was a different size, the transferred data is stored in RAM, so you can retry with other file, or shutdown the router.
You're still in the safe area, nothing is deleted/flashed yet!

When finished type:
Quote:
hornet> erase 0x9f020000 +0x3c0000


(check twice when typing, this is dangerous, you can brick it if wrong numbers are typed, and there is no JTAG!! )

Now, it should have erased 60 flash sectors as this:
Quote:
First 0x2 last 0x3d sector size 0x10000
61
Erased 60 sectors


Now the last command:

Quote:
hornet> cp.b 0x81000000 0x9f020000 0x3c0000


This will copy the image you downloaded with tftpboot and saved to the RAM into the flash.
Again, type the correct numbers, or you will copy some ramdom data from the memory into flash, thus writing incorrect data, overwriting the factory calibration data or even corrupting the bootloader.
When finished, your router will be flashed and ready:
Quote:

Copy to Flash... write addr: 9f020000
done

Now power off the router, wait 2-3 seconds and power on again.

If you flashed the correct file you will have a working router.


Just for letting the people knowing:
I sucessfully flashed the WR703N firmware onto WR740N v4 with this method (to make it work as repeater while I was learning to setup openwrt Laughing ).
Firmware here:
Link to 703N firmware:
http://tplink.cn/downloadfilesuploadfolder/2012110162848.rar
(slow link due chinese server...but only 3.5MB, be patient)


Have fun! Twisted Evil


Last edited by dabyd64 on Sun Aug 03, 2014 1:37; edited 21 times in total
Sash
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PostPosted: Mon Feb 13, 2012 16:24    Post subject: Reply with quote
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checho
DD-WRT Guru


Joined: 27 Feb 2007
Posts: 527
Location: Bulgaria

PostPosted: Tue Feb 14, 2012 20:10    Post subject: Reply with quote
Today I got confirmation from dd-wrt that they received my donated router. I am impatiently waiting for a build and hope they come across no difficulties to make it soon.
dabyd64
DD-WRT User


Joined: 27 Sep 2011
Posts: 112

PostPosted: Wed Feb 15, 2012 12:57    Post subject: Reply with quote
Thanks checho!
Here in Spain, international shippings are very expensive...sending to Germany 25€ + 3€ per Kg!!Evil or Very Mad
Even more than the router itself...
I hope it gets working soon, thanks to developers too Smile


Last edited by dabyd64 on Wed Feb 15, 2012 21:21; edited 1 time in total
checho
DD-WRT Guru


Joined: 27 Feb 2007
Posts: 527
Location: Bulgaria

PostPosted: Wed Feb 15, 2012 15:27    Post subject: Reply with quote
dabyd64 wrote:
Thanks checho!
Here in Spain, international shippings are very expensive...sending to Germany 25€ + 3€ per Kg!!Evil or Very Mad
Even more than the router itself...
I hope it got working soon, thanks to developers too Smile


I have 5 EUR shipping cost and 17 EUR router cost. This is from Bulgaria.
dabyd64
DD-WRT User


Joined: 27 Sep 2011
Posts: 112

PostPosted: Wed Feb 15, 2012 22:01    Post subject: Reply with quote
checho wrote:

I have 5 EUR shipping cost and 17 EUR router cost. This is from Bulgaria.

Nice! I got mine in Amazon at just 13,95€...and I was in premium trial, so free shipping, I was lucky Smile
4-6€ here is for just national shipping (cheapest), and small things, over 2KG the price grows a lot. Confused
mitza97
DD-WRT User


Joined: 29 Dec 2011
Posts: 125

PostPosted: Tue Feb 21, 2012 16:54    Post subject: Reply with quote
Still WIP...nothing new ??? Sad
Bovoro
DD-WRT Novice


Joined: 13 Feb 2012
Posts: 2

PostPosted: Tue Feb 21, 2012 20:14    Post subject: Reply with quote
dabyd64 wrote:
Really, all I tried to make openwrt work as repeater leads to topic "issue with ...." which leads to new bug topics.
I am not a linux programmer nor a system designer. I didn't know that I'd need so to just make it work as repeater.

How to flash wr703n firmware onto wr-740n v4 //741n v4 (they're the same but the 741 has detachable antenna):

If .bin file doesn't work in the web upgrade, you should flash it through the bootloader.

Things you'll need:

Code:
Terminal(putty, teraterm, hyperterminal, that's your choice)
Tftpd32: http://tftpd32.jounin.net/
firmware: http://tplink.cn/downloadfilesuploadfolder/2012110162848.rar
Ethernet cable
Solder
Thin cable
Serial adapter.


(slow link due chinese server...but only 3.5MB, be patient)


You have to solder a serial port like here:
http://wiki.openwrt.org/toh/tp-link/tl-wr741nd
Only look at v4 steps.

Once you got the serial, open a terminal with 115.200baud, 8bit, 1 stop, no parity, no flow control.

Power on the router and you will see the console booting up.
Quick!! Type "tpl" between the first 2 seconds from powerup (without quotes) to enter the comand line.

Now, connect an ethernet cable betweeen your computer and the router, any port will be ok but NOT WAN port.
Configure IP address in ethernet interface of computer as:
Code:
IP 192.168.100.1
subnet mask 255.255.255.0


Open tftpd32, copy "wr703nv1.bin" file from firmware zip into tftpd32's folder.

Now, in the bootloader shell, enter this

Code:
tftpboot 0x81000000 wr703nv1.bin


you'll se it downloading the file.
It should put "3c0000" at the end , check it!!
Otherwise DO NOT continue, shutdown router if you don't know what you're doing! You're still in the safe area!

When finished type:
Code:
erase 0x9f020000 +0x3c0000


(check twice when typing, this is dangerous, you can brick it if wrong numbers are typed)

Now, it should have erased 60 flash sectors.

The last command:

Code:
cp.b 0x81000000 0x9f020000 0x3c0000



This will copy the image you downloaded with tftpbooy, to the flash.
When finished, you'll have finished.
Now reboot router and you can use as a wr703n, except no USB.

I am doing a wireless repeater this way, pretty happy for now, no lags, no reboots, no strage issues.

Have fun! Twisted Evil


Thanks man, i will put hands ASAP,Very Happy
checho
DD-WRT Guru


Joined: 27 Feb 2007
Posts: 527
Location: Bulgaria

PostPosted: Wed Feb 22, 2012 20:53    Post subject: Reply with quote
http://svn.dd-wrt.com:8000/changeset/18526

Good news are that dd-wrt will start to support these starting from the next build. I am glad I could help with my router donated for that purpose. Waiting for the compiled software with no patience at all.
dabyd64
DD-WRT User


Joined: 27 Sep 2011
Posts: 112

PostPosted: Thu Feb 23, 2012 13:47    Post subject: Reply with quote
yes! Very Happy That is fast!
I will donate some cash when I get a job (such a hard thing here), I was fired few weeks ago because there was no job incoming, so no money to maintain all the workers Mad.
Thanks BS, checho Wink
mitza97
DD-WRT User


Joined: 29 Dec 2011
Posts: 125

PostPosted: Fri Feb 24, 2012 15:43    Post subject: Reply with quote
When will be released next build of firmware ? Shocked
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