TP-Link TL-WR841ND v7.x

Wikidevi Notes
AR7241-AH1A + AR9287-BL1A

The default SSID is TP-LINK_XXXXXX where XXXXXX is the last three octets of the wireless interface MAC address (uppercase letters).

"2050500124 Rev:1.0" is silkscreened on the board.

The power supply included with the device is a Leader Electronics MU05-N090060-A1. ID/OD/Len measurements are approximate.

See also TP-Link TL-WR841N v7.x (same aside from the antenna configuration)

Links of Interest

 * On DD-WRT forums

Flashing DD-WRT
DD-WRT Wiki First setup a TFTP server which is serving the firmware file. (Only flash "factory-to-"ddwrt/openwrt files)
 * http://www.dd-wrt.com/phpBB2/viewtopic.php?p=484186
 * http://www.dd-wrt.com/phpBB2/viewtopic.php?t=82136

Then we have to setup the network settings. Type the following things into the bootloader prompt. Replace ROUTERIP and SERVERIP with the right IPs.

setenv ipaddr ROUTERIP

setenv serverip SERVERIP

Now we have to load the firmware into the memory!. Replace FACTORY-TO-OPENWRT/DDWRT.bin with the right filename of the image!

ar7240> tftpboot 0x80000000 FACTORY-TO-OPENWRT/DDWRT.bin

You will read something like that. The size is very important. Note it. It can differ to the example.

Bytes transferred = 3932160 (3c0000 hex)

The last steps are erasing the flash and writing the new image to the right address. Replace 3c0000 with the address you noted before.

ar7240> erase 0x9f020000 +0x3c0000

ar7240> cp.b 0x80000000 0x9f020000 0x3c0000

ar7240> bootm 0x9f020000

Flashing OpenWRT
OpenWRT Wiki


 * 1) Download V7 image: http://downloads.openwrt.org/attitude_adjustment/12.09/ar71xx/generic/openwrt-ar71xx-generic-tl-wr841nd-v7-squashfs-factory.bin
 * 2) Log in to router web interface and select the firmware image you just uploaded as an update
 * 3) Sit and wait while it flashes. It will reboot and be accessible at 192.168.1.1.
 * Warning! in some cases after reboot you don't have web interface (GUI), only telnet and ssh access. You can install GUI, for details see: doc/howto/luci.essentials, but before install LuCI (GUI) you need to configure your router to have access to internet, for configuration see: doc/howto/internet.connection

USB Info

 * USB 2.0 Mod (R601(D+) R602(D-) ADD 5V,GND)

Pictures
TP-Link Images

Hardware Modification

 * WR841N(D) V7 USB 2.0 Mod (R601(D+) R602(D-) ADD 5V,GND)
 * USB 2.0 Mod (R601(D+) R602(D-) ADD 5V,GND)