Hi there,

I get "checksum bad" error when I run tftpboot command (right after connecting the LAN cable). I went step-by-step through phukit's comment above (first comment in this thread).

I'm using TFTPD32. In TFTPD32 GUI I can't see any tftp "job" running, so it seems that the router does not download anything at all (I tried tftp from other computer, and it works well, the job appears in tftp GUI).

Here is the printout when I run the tftpboot command (and attach the LAN cable):

ar7100> tftpboot 0x81000000 myfirmware.bin
Using eth0 device
TFTP from server 192.168.0.5; our IP address is 192.168.0.2
Filename 'myfirmware.bin'.
Load address: 0x81000000
Loading: T checksum bad
checksum bad
checksum bad
checksum bad
T checksum bad
checksum bad
checksum bad
T T T T T T T T
Retry count exceeded; starting again
Using eth0 device
TFTP from server 192.168.0.5; our IP address is 192.168.0.2
Filename 'myfirmware.bin'.
Load address: 0x81000000
Loading: T T T T T T T T T T

Additional remarks:
My computer's ip : 192.168.0.5, subnet mask : 255.255.255.0 , def gw: none

printenv command result:

ar7100> printenv
bootargs=console=ttyS0,115200 root=31:02 rootfstype=jffs2 init=/sbin/init mtdparts=ar9100-nor0:128k(u-boot),1024k(kernel),4096k(rootfs),64k(art)
bootcmd=bootm 0xbf020000
bootdelay=1
baudrate=115200
ethaddr=00:1D:0F:11:22:33
ipaddr=192.168.0.2
serverip=192.168.0.5
stdin=serial
stdout=serial
stderr=serial
ethact=eth0

Can anyone help please, why is bad checksum message keep appearing?

Hi guys, I'm unsure my router could be recovered or otherwise.
When powered up, all led would lit and subsequently remain with the power led.
The lan led switch at step 5 and I could ping.

I am using the same controller and driver as step 0, but I am stuck at step 7.
When entering the line screen /dev/tty.SLAB_USBtoUART 115200 8N1
Terminal just revert with a blank page and stays there forever.

Any pointers that I have missed or done wrong?

Thanks in advance.

Working corect unbrick TL-WR1043ND V2.1

windows xp sp3 notebook , usb ttl rs232 prolific PL2303 adaptor,tftpd32 4.52,putty, firmware TL-WR1043ND-V2-FW0.0.3-stripped.bin .
after install USB SERIAL RS232 in Windows XP, find device manager : ports COM & LPT ,configure PUTTY serial line COM number,speed baud 115200,8 ,1,none parity,none flow.
dizable wifi adaptor and all another lan inteface/adaptor ,only enable RJ45 and settings ipv4 IP adress manual 192.168.1.100,mask 255.255.255.0 ,gateway 192.168.1.1
in tftpd32 folder copy PUTTY ,firmware TL-WR1043ND-V2-FW0.0.3-stripped.bin and rename to 6F01A8C0.img
TFTPD32 config/settings to lan 192.168.1.100

putty , typing very fast (command for stoping loading router boot interface ).
---------
tpl
--------
commands using

tftp
erase 0x9f020000 +0x7c0000
cp.b 0x81000000 0x9f020000 0x7c0000
boot.m 0x9f020000
___________________________
second options

Putty ,command
-------------
  firstboot -y
---------------
after execute remove and insert power cable very fast and typing
---
   tpl
   tftp
erase 0x9f020000 +0x7c0000
cp.b 0x81000000 0x9f020000 0x7c0000
boot.m 0x9f020000
-------------------

visit https://www.youtube.com/watch?v=t35Pei_eb6o
https://www.youtube.com/watch?v=wCwBvoueBG4

(Last edited by icxnc1 on 7 Mar 2016, 01:15)

Can I use serial db9 for this purpose? Congect pin 2 3 and 5?

Can I use windows 10?

I can´t write at Putty Terminal, I only can write after appears " Uncompressing Kernel Image ... Stream with EOS marker is not supportedLZMA ERROR 1 - must RESET board to recover" so I cant write after "Autobooting 1 second..."

TERMINAL IS LIKE THIS:
U-Boot 1.1.4 (Jun 13 2014 - 15:14:01)

ap135 - Scorpion 1.0DRAM:
sri
Scorpion 1.0
ath_ddr_initial_config(178): (16bit) ddr2 init
tap = 0x00000003
Tap (low, high) = (0x0, 0x1b)
Tap values = (0xd, 0xd, 0xd, 0xd)
64 MB
Flash Manuf Id 0xef, DeviceId0 0x40, DeviceId1 0x17
flash size 8MB, sector count = 128
Flash:  8 MB
Using default environment

*** Warning *** : PCIe WLAN Module not found !!!
*** Warning *** : PCIe WLAN Module not found !!!
In:    serial
Out:   serial
Err:   serial
Net:   ath_gmac_enet_initialize...
athrs_sgmii_res_cal: cal value = 0xe
No valid address in Flash. Using fixed address
No valid address in Flash. Using fixed address
ath_gmac_enet_initialize: reset mask:c02200
Scorpion  ----> S17 PHY *
athrs17_reg_init: complete
: cfg1 0x80000000 cfg2 0x7114
eth0: ba:be:fa:ce:08:41
eth0 up
athrs17_reg_init_wan done
SGMII in forced mode
athr_gmac_sgmii_setup SGMII done
: cfg1 0x800c0000 cfg2 0x7214
eth1: ba:be:fa:ce:08:41
eth1 up
eth0, eth1
Setting 0x18116290 to 0x58b1a14f
Autobooting in 1 seconds
botting image at 9f020000 ...
   Uncompressing Kernel Image ... Stream with EOS marker is not supportedLZMA ERROR 1 - must RESET board to recover

HELP ME PLEASE

Thanks for the guide. Just fixed my router using this :-)

Thanks for the guide. I was close to throwing away my router, because some things were not working for me. But I made it in the end
Here are some things that I struggled with, but solved eventually. (Hopefully it will save time for others with bricked TP routers):

* I got the serial communication working, using a raspberry pi and the 'gnu screen' program. I could see the router booting up, ending in kernel panic. BUT I couldn't get a command prompt by typing 'tpl'.
After many attempts I did a loopback on the serial communication from the rPI by connecting the Rx and Tx pins together. That is when I realized that 'screen' was only sending CR on a 'enter' keypress.
That's when a changed to "picocom", starting it with the command:

picocom -b 115200 -f n -p n -d 8 --omap crcrlf /dev/ttyAMA0

* The next mistake that I made was typing the commands for a version 1.x model, while I have a version 2.x model (e.g. ip address of the PC should be 192.168.1.100)

* The last thing that did not work for me, was flashing the latest OEM firmware, but when I flashed the latest openwrt-...-factory.bin, the router was finally and successfully unbricked!! :-)

Hope that you can all learn from my mistakes.

(Smart people learn from their mistakes, wise people learn from others' mistakes)

I'm totally noob at this stuff, but I bought a bricked router to learn some new things.  These instructions brought my v2 back to life.  Thanks also to the OP.  My wifi bubble continues to grow with the help of these great forums/members.

Hi guys, great job!
Unfortunately doesnt work on my V2.1. with win7 (6 4)
After "tftpboot" command in putty I got this :
______________________________________________________
eth0 link down
*** Warning: no boot file name; using '6F01A8C0.img'
Using eth1 device
TFTP from server 192.168.1.100; our IP address is 192.168.1.111
Filename '6F01A8C0.img'.
Load address: 0x81000000
Loading: *
TFTP error: 'File not found or No Access' (1)
Starting again
_________________________________________________________
Can you help me, pls....

(Last edited by puiusoft on 1 Jun 2016, 18:52)

I did it............
No putty.......no other extra cables....just tftp.....
Here is how
http://forum.tp-link.com/showthread.php … bricked-it
Just use wr1043v2_tp_recovery.bin for the firmware, and dont forget about 192.168.0.66 !
Hope you succeded too....
See you guys!

(Last edited by puiusoft on 4 Jun 2016, 06:21)

I think there are 2 way to unbrick router belong to the way to login in router.
-First login is  tplinklogin.net
- The second is  tplinkwifi.net

Hello,

I would kindly ask you to help unbrick tl-wr1043ND v.3.0
I have the following problem
made pines just like in the picture

Now I do not know if it's ok or not. On the USB-TTL I connect them from the bottom up: RX-TX-GND-3.3V

when I connect with putty it does not happen nothing just waiting for a response.

With one USB-TTL, this showed me this.

I have no solution whatsoever, so I ask you for help.

tnx

Sorry, I can not upload the pictures, but I do not know why. if anyone knows how to order it, please ask for advice.

(Last edited by jurcek85 on 17 Sep 2017, 13:09)