Thanks for information, I think all the problem comes from DD, I used it on windows and I don't have any knowledge of using that, any command I use it doesn't work and I get same command in output. Is there something wrong with DD ? or I don't know anything of it ?
I've bought CH340G Serial Converter from Aliexpress and it's on the way. I got some pins ( 6pin, 8pin, 10pin),
Can you see if I got the right item ? I have put the links down below .
aliexpress.c o m/item/1PCS-CH340G-Serial-Converter-USB-2-0-To-TTL-6PIN-Module-for-PRO-mini-Instead-of/32309334168.html
Also I found way on the Internet, about using "TFTPD32" software and holding reset button for 4-5 sec and meanwhile turning on router, it will try to get the firmware automatically but I couldn't make it and after a few hours of trying it didn't work, the problem was with TFTP server address, I couldn't find it and also only power link and LAN is up, the rest of the lights are off.
About using serial connector, What part did you mean I need to follow ? Is it the right one ?
At the time of writing, the only known method of installation involves access to the bootloader, which requires using the serial console. This in turn requires opening the device to access the contacts on the circuit board.
Once a serial console has been established (see below for further details) the following method worked for at least one person:
Download the openwrt-lantiq-xrx200-TDW8970-uImage-initramfs image from wherever you can find it (the official release does not supply a uImage with an initramfs, so booting that just gives you an error about a missing root filesystem.)
You can build the image with initramfs yourself (see OpenWrt build system). Note that it's necessary to choose to compress the initramfs with LZMA (this worked at least for me) to succesfully boot.
Ensure that you have a working tftp server on you system, serving the initramfs image, and to have ethernet connnected to the device with a proper ip address set.
Connect to the serial console, power the device on and press any key on the serial console until you get a prompt, then run commands similar to these:
Set the device's IP if you don't want the default 192.168.1.1: (so you don't have to move your TFTP server onto a different subnet)
Thanks in advance .