Linksys WRT54GS v3

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bg (G54)
Wireless-G Broadband Router with SpeedBooster
Linksys-WRT54GS-ses.jpg
Support Support page
Wikipedia Linksys routers
InfoDepot Wiki Linksys WRT54GS v3.0
WikiDevi.wi-cat.ru Linksys WRT54GS v3
3rd Party Firmware
dd-wrt Supported
OpenWrt Was Supported
Tomato any flavor Supported
Gargoyle Status Unknown
Platform
BrandModelRev Linksys WRT54GS v3
Serial number prefix CGN5
FCC ID Q87-WT54GV40
Type wireless router
Series WRT54GS
CPU1 checkY Broadcom BCM5352E
CPU1 Type BMIPS3300
CPU1 Speed 200 MHz
Flash1 Chip Brand? Model?
Flash1 Size 8 MiB8,388,608 B <br />65,536 Kib <br />8,192 KiB <br />64 Mib <br />0.00781 GiB <br />
RAM1 Size 32 MiB33,554,432 B <br />262,144 Kib <br />32,768 KiB <br />256 Mib <br />0.0313 GiB <br />
RAM1 Chip Brand? Model?
ETH chip1 Broadcom BCM5352E
Switch Broadcom BCM5352E
Ethernet Port Count 1-100MbE-WAN
4-100MbE-LAN
Wired Standard IEEE 802.3/3u

802dot11 OUI: none specified

Stock bootloader CFE
Stock FW OS Linux
Expansion IF types none specified
Power 12 VDC, 1 A
Connector type barrel
Serial Port (UART) yes
JTAG Port yes
Other

Default IP address: 192.168.1.1
the IP 192.168.1.1 is used by 1335 additional devices
of which 155 are Linksys devices
Default login user: blank
Default login password: admin
blank:admin credentials used by 284 additional devices
of which 135 are Linksys devices

Manuf/OEM/ODM CyberTAN
3rd Party Firmware Support Broadband-Hamnet
, DD-WRT • (List)
, OpenWrt (Was)
, Tomato • (List | DLs)
, TomatoUSB • (List | DLs)
Retail
Availability End of Life
FCC approval date 31 May 2005
Radio 1
Chip1 Broadcom BCM5352E
Chip2 Broadcom BCM2050
Wireless interface OUI none specified
Antenna Connector Type RP-TNC
Wireless Standard IEEE 802.11b/g
802.11g up to 54 Mbps
802.11b up to 11 Mbps
WiFi Operating Frequency 2.4 GHz
Radio cor_rev 9
 FCC ID
Linksys WRT54G v4Q87-WT54GV40
Linksys WRT54G-RGQ87-WT54GV40
Linksys WRT54G-TMQ87-WT54GV40
Linksys WRT54GL v1.0Q87-WT54GV40
Linksys WRT54GL v1.1Q87-WT54GV40
Linksys WRT54GS v4Q87-WT54GV40
Linksys WRT54GS v5.0Q87-WT54GV40
Linksys WRT54GS v5.1Q87-WT54GV40
 CPU1 brandRadio1 chip1 brandRadio1 chip2 brand
Linksys WRT54GS v1.0BroadcomBroadcomBroadcom
Linksys WRT54GS v1.1BroadcomBroadcomBroadcom
Linksys WRT54GS v2.0BroadcomBroadcomBroadcom
Linksys WRT54GS v2.1BroadcomBroadcomBroadcom
Linksys WRT54GS v3BroadcomBroadcomBroadcom
Linksys WRT54GS v4BroadcomBroadcomBroadcom
Linksys WRT54GS v5.0BroadcomBroadcomBroadcom
Linksys WRT54GS v5.1BroadcomBroadcomBroadcom
Linksys WRT54GS v6.0BroadcomBroadcomBroadcom
Linksys WRT54GS v7.0BroadcomBroadcom
Linksys WRT54GS v7.2BroadcomBroadcom

For a list of all currently documented Broadcom chipsets with specifications, see Broadcom.

For a list of all currently documented Linksys devices with specifications, see Linksys.

54 Mbps - 2.4GHz 802.11g = G54 class

Overview

Links of Interest

WRT54G series on Wikipedia
Linksys WRT54Gxx page on the DD-WRT wiki
Linksys WRT54G, WRT54GL and WRT54GS page on the OpenWrt wiki

Flashing

Flashing dd-wrt

 

Support started version: ?
Current supported version: ?

Always make sure your broswer cache is cleared before doing this procedure

1) Restore Factory defaults from linksys webgui, download this dd-wrt build WRT54G Trailed Build

2) Set a static IP on computer than you are flashing with, set it to 192.168.1.5

3) Access the linksys webgui at http://192.168.1.1 l:admin p:admin

4) Go to the tab Administration > Firmware Upgrade and select the WRT54G Trailed Build file that you downloaded in step 1.

5) Go ahead and flash, you need to wait 6 minutes for file to completely flash safely, do not power cycle or reset in any way!

6) Browser should refresh to the new dd-wrt webgui at 192.168.1.1 prompting you to change your user/password. Go ahead and enter a temporary user/pass.

7) Once in the dd-wrt webgui go to Administration > Factory Defaults and select to restore factory defaults.

8) This will hard reset your router, which will take about 2-3 minutes to complete.

9) After it is finished you can then re-access the dd-wrt webgui at 192.168.1.1, it will again want you to set a user/pass, go ahead and do so, then begin to set settings and enjoy dd-wrt.

  • Also as a side note, if you intend on using DHCP, you will want to unset your static ip.
  • If you want to run a different build flavor you are not limited to only running mini, this unit can run micro, mini, nokaid, and std flavors of dd-wrt. Do not use anything bigger than those or risk bricking your unit.
  • Newer builds can be found in the dd-wrt file server. I use broadcom specific eko builds on my v3 which can be found in his build branch of the ftp. Currently I use 15230 mini-hotspot-kaid which seems to work well. Remember, newer is not always better and you should always reference the forum for build posts. Build 12548 also works well on these older G only routers

ftp://ftp.dd-wrt.com/others/eko/V24_TNG (broken link; these files do not exist on the download server.) --Kernel-panic69 23:34, 1 June 2025 (CEST)

Flashing OpenWrt

On the OpenWrt ToH (techdata entry)
On the OpenWrt Wiki
OpenWrt Target: bcm47xx
OpenWrt Subtarget: legacy
OpenWrt Package architecture: mipsel_mips32
Support started version: 0.9
Current supported version: EOL
Last Supported Version: 22.03.7
Comment:
Final version: 22.03.7

Please insert instructions here

Flashing Tomato

Please insert instructions here

Upgrading

Updating DD-WRT

If dd-wrt is already on the router follow these instructions. If stock firmware is on the router follow the flashing instructions.

  1. Check for recommended builds here first.
  2. Set your computer to a static IP of 192.168.1.7. (or to whatever subnet the router is on) Disable all firewalls and security. Disable wireless on your computer and only have the router connected to the flashing computer by the ethernet cable between the two.
  3. Hard reset or 30/30/30 (If the router supports it, if not, reset to defults in the GUI) prior to flashing. Wait. Check for password page on re-login and change password.
  4. Flash firmware. You can use the webgui except if you have a belkin router. (For belkin use tftp.exe to flash)
  5. Wait...at least three minutes. Lights should return to normal. See important2, below. Failing to wait is how most people brick their routers.
  6. Do a power cycle of the router. (Unplug the cord, count to 30 and plug it back in.)
  7. Wait for the lights to return to normal usually about 2 minutes.
  8. Hard reset or 30/30/30 again (If the router supports it, if not, reset to defults in the GUI). Wait. Check for the password page and re-login to change the password. Then you can reconfigure your settings manually.
  9. Once configured set your computer back to autoIP and autoDNS.

Important1: This Hard reset or 30/30/30 works fine for Asus router, but you do have to power cycle after the reset.

Important2: After you flash the firmware, and before you do the hard reset, the router will be building some nvram settings. YOU MUST WAIT FOR THIS TO FINISH PRIOR TO DOING ANYTHING WITH THE ROUTER INCLUDING A HARD RESET. Usually, you can tell when this process is completed by the WAN light coming on, but it does take several minutes. Go have a beer. There are starting to be more and more people who BRICK their routers by not waiting until the nvram is rebuilt, PRIOR to doing a hard reset. YOU NEED TO WAIT!

Pictures

FCCID Q87-WT54GV40

Notes

Other Notes

[Comment added 05/03/06 by PhoneBoy] On my WRT54GSv3, I found that the device wouldn't take ANY firmware unless I reset it using the button rather than just factory reset from the web interface. Word of warning. I was able to download and install the firmware for the purposes of getting vpn up and running. The firmware installed and everything is as before. however, still no vpn.