Openwrt

Small linux for routers

Router

http://wiki.openwrt.org/inbox/tp-link.tl-wr1043nd

Write firmware

mtd write /tmp/openwrt-brcm47xx-squashfs.trx linux
reboot

mtd -e firmware write /tmp/openwrt-ar71xx-tl-wr1043ndv1-squashfs-universal.bin firmware
reboot

Which version of openwrt is installed.

cat /etc/banner

read /var/log/messages

logread

packages

update package list

opkg update 

install openvpn

opkg install http://downloads.openwrt.org/kamikaze/8.09.2/brcm-2.4/packages/zlib_1.2.3-5_mipsel.ipk
opkg install http://downloads.openwrt.org/kamikaze/8.09.2/brcm-2.4/packages/libopenssl_0.9.8i-3.2_mipsel.ipk
opkg install http://downloads.openwrt.org/kamikaze/8.09.2/brcm-2.4/packages/liblzo_2.03-1_mipsel.ipk
opkg install http://downloads.openwrt.org/kamikaze/8.09.2/brcm-2.4/packages/openvpn_2.0.9-5.1_mipsel.ipk

mount jffs2

mount -t jffs2 /dev/mtdblock3 /jffs/

list wireless

iw phy

serial cable

http://www.nslu2-linux.org/wiki/HowTo/AddASerialPort
http://wiki.openwrt.org/oldwiki/openwrtdocs/customizing/hardware/serial_console
http://wiki.openwrt.org/inbox/tp-link.tl-wr1043nd#oem.installation.using.the.tftp.and.rs232.method
http://jethomson.wordpress.com/2010/02/21/diy-usb-to-serial-cable-for-3usd/

openwrt

http://eko.one.pl/openwrt/
http://openwrt.groov.pl

recover tp-link wr1043nd

you can use any hexeditor to delete the first 0x20200 byte, it will start with 01 00 00 00 54 50 after delete

dd if=wr1043nv1_en_3_9_17_up_boot\(091118\).bin of=tplink.bin.257 skip=257 bs=512

tftp server

code.bin containing openwrt firmware.

• Cut cable of ca-42 and locate the four cables. gnd, rx, tx, ttl

Serial port cummunication values.

115200 8n1

Connect cables to wr1043nd and plug usb in computer. Start terminal emulator.

screen /dev/ttyUSB0

Start router and look at terminal. When waiting for 1 second press

tpl 

• when it show autobooting, it will let you get into U-boot.
• you can set the router ip address by

setenv ipaddr 192.168.1.1

• tftpd server address by

setenv serverip 192.168.1.100

What to write in ubootin

erase 0xbf020000 +7c0000
7c0000: size of the firmware (be aware that u can have diffrent size so u will brick your router) 
tftpboot 0x81000000 code.bin
cp.b 0x81000000 0xbf020000 0x7c0000
bootm 0xbf020000