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Topic: Tplink WR940N v2 upgrade ram/flash/uboot succeed.

The content of this topic has been archived on 21 Apr 2018. There are no obvious gaps in this topic, but there may still be some posts missing at the end.

I had upgrade ram to 64MB, flash to 16MB & upgrade u-boot of 841nd v8 without problem. The router run 841nd v8 firmware work perfect, except two lan led not blink.

http://thumbnails112.imagebam.com/39849/589915398481861.jpg http://thumbnails111.imagebam.com/39849/c759d6398481869.jpg http://thumbnails112.imagebam.com/39849/8cc253398481879.jpg http://thumbnails110.imagebam.com/39849/08161b398481883.jpg

verry good!

Hello leeandy,
Any issues with this router until now?
Regarding upgrade how to: ram exchange is pretty straight forward , only a matter of finding a usable chip and some soldering skills.
Can you make a tutorial about flash upgrade? I am pretty sure that the flash chip has to be programmed before soldering.. Or is there another way?  I have an 8meg flash available but, I allready hard bricked another router by damaging the spi controller while exchanging ...
Some help would be apreciated.

Hi mihai_spatariu

My router running 2 months without any problem, it very stable.

To upgrading flash, follow these step:
- First & important: backup u-boot & art partition.
To backup uboot/art:
cat /dev/mtd0 > /tmp/uboot.bin
cat /dev/mtd4 > /tmp/art.bin
and copy backup file by any scp software you like.
- Use any compatible serial flash programmer (ex: CH341 is very cheap programmer) to flashing uboot backup to new flash. Or you can use programmer copy whole orig flash to new flash.
- Flash new uboot mod, you need to use wr841n v8 uboot, how to: https://github.com/pepe2k/u-boot_mod
- Flash 841nv8 or 941nv5 firmware by command: sysupgrade -F xxxx.bin, you can't flash firmware by Luci gui. More infos: https://forum.openwrt.org/viewtopic.php … 19&p=3
- If wifi radio not work, reflash art mtd.

Good luck.

congratulations  ...

good job  smile

(Last edited by micro77 on 31 May 2015, 21:16)

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