Linksys WRT54G v2.2

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Linksys WRT54G v2.2
Availability: common

Manuf/OEM/ODM CyberTAN

FCC approval date: 17 September 2004
Country of manuf.: China
Serial Num. Prefix: CDF7

Local image
Linksys WRT54G-02.jpg

Type: wireless router

FCC ID: Q87-WT54GV22
Industry Canada ID: 3839A-WT54GV22

Power: 12 VDC, 1 A
Connector type: barrel

CPU1: Broadcom BCM4712
FLA1: 4 MiB
4,194,304 B
32,768 Kib
4,096 KiB
32 Mib
0.00391 GiB
(Intel TE28F320C3BD70)
RAM1: 16 MiB
16,777,216 B
131,072 Kib
16,384 KiB
128 Mib
0.0156 GiB
(Hynix HY5DU281622ET-J × 2)

Expansion IFs: none specified
JTAG: yes, 12-pin header, unpopulated
Serial: yes, 10-pin header, unpopulated, (115200,8,N,1)

WI1 chip1: Broadcom BCM4712
WI1 chip2: Broadcom BCM2050
WI1 802dot11 protocols: bg
WI1 antenna connector: RP-TNC

ETH chip1: Broadcom BCM4712
Switch: Broadcom BCM5325E
LAN speed: 10/100
LAN ports: 4
WAN speed: 10/100
WAN ports: 1

bg

Stock bootloader: CFE

Stock FW OS: Linux

Third party firmware supported: DD-WRT • (List), OpenWrt, Tomato • (List), TomatoUSB • (List)

Default SSID: linksys (50 addl. devices)
Default IP address: 192.168.1.1
the IP 192.168.1.1 is used by 1012 additional devices
of which 136 are Linksys devices
Default login user: blank
Default login password: admin
blank:admin credentials used by 261 additional devices
of which 137 are Linksys devices

802dot11 OUI: 00:12:17 (16 E, 32 W, 2004), 00:13:10 (17 E, 17 W, 2004)
Ethernet OUI: 00:12:17 (16 E, 32 W, 2004), 00:13:10 (17 E, 17 W, 2004)

 FCC ID
Linksys WRT54G v3.0Q87-WT54GV22
Linksys WRT54G v3.1Q87-WT54GV22
Linksys WRT54GS v1.1Q87-WT54GV22
Linksys WRT54GS v2.0Q87-WT54GV22
Linksys WRT54GS v2.1Q87-WT54GV22
 CPU1 brandWI1 chip1 brandWI1 chip2 brand
Linksys WRT54G v1.0BroadcomBroadcomBroadcom
Linksys WRT54G v1.1BroadcomBroadcomBroadcom
Linksys WRT54G v2.0BroadcomBroadcomBroadcom
Linksys WRT54G v2.2BroadcomBroadcomBroadcom
Linksys WRT54G v3.0BroadcomBroadcomBroadcom
Linksys WRT54G v3.1BroadcomBroadcomBroadcom
Linksys WRT54G v4BroadcomBroadcomBroadcom
Linksys WRT54G v5BroadcomBroadcomBroadcom
Linksys WRT54G v6BroadcomBroadcomBroadcom
Linksys WRT54G v7.0AtherosAtheros
Linksys WRT54G v7.2BroadcomBroadcom
Linksys WRT54G v8.0BroadcomBroadcom
Linksys WRT54G v8.1BroadcomBroadcom
Linksys WRT54G v8.2BroadcomBroadcom
Linksys WRT54GHRalinkRalink
For a list of all currently documented Broadcom chipsets with specifications, see Broadcom.


Wireless-G Broadband Router

 • Support page • Downloads (US)

Additional FCC IDs of Q87-HGA5T-1 (Linksys HGA5T, high gain antennas), Q87-HGA7T-6 (Linksys HGA7T, high gain antennas)

Wi-Fi Certified (alt.) (as of 10/01/2004)

There is an additional certification of W002940 (10/29/2004) for this device which notes added WPA2 capability.

Links of Interest[edit]

Flashing[edit]

Flashing DD-WRT[edit]

 
  1. Read the peacock announcement found here: http://www.dd-wrt.com/phpBB2/viewtopic.php?t=51486
  2. Do a Hard reset or 30/30/30 on the router according to note 1 of the peacock announcement (30/30/30)
  3. Set a static IP on your computer to 192.168.1.7. Subnet mask should be 255.255.255.0.
  4. Connect the lan cable from your computer to a LAN port of your router. Make sure your router is plugged in. Nothing should be connected to your computer or the router except the lan cable between them. Turn your firewall and any wireless computer connections OFF.
  5. Power cycle the router (unplug the power from the router for 30 seconds and then plug it back in)
  6. Open your browser to 192.168.1.1 by putting that in the browser address window of your browser. You should open the linksys webgui and NOT a page that says Management Mode. If you see management mode, power cycle the router again.
  7. Leave the username blank and enter "admin" as the password
  8. Go to administration and firmware upgrade
  9. Navigate to the folder that you are using, and select dd-wrt.v24-15230_VINT_mini.bin
  10. Hit upgrade
  11. When you get a message that the upgrade is successful, wait FIVE FULL minutes before continuing.
  12. If you don't get success, repeat from steps 6 up to this one. If you still don't get success, clear your browser cache. Try using a different browser as well, to navigate to 192.168.1.1.
  13. When you can access the dd-wrt webgui using a browser at 192.168.1.1, power cycle the router.
  14. When you can again access the dd-wrt webgui using a browser at 192.168.1.1, do another Hard reset or 30/30/30 on the router.
  15. At this point you can choose to put a different build on, depending on what you needs are.
  16. Reset your computer ethernet connection to auto IP and auto DNS
  17. Check for recommended builds here.

Flashing OpenWRT[edit]

Linksys WRT54G On the OpenWrt Wiki

Using the Linksys web GUI[edit]

It is possible to install OpenWrt directly with the Linksys web GUI. If you are initially installing OpenWrt use the Linksys web GUI, this is the easiest way.

  • Download the openwrt-wrt54g-squashfs.bin firmware image from the brcm-2.4 folder to your PC.
  • You can find that image at: http://downloads.openwrt.org/backfire/10.03.1/brcm-2.4/
  • Actually the safest version to use would be 8.09. Hmmm, it looks like 10.03.1 is safe but you must use the brcm-2.4 variant like in the link above. I am not risking bricking my router for the initial flash, so I am going with 8.09.
  • Open http://192.168.1.1/Upgrade.asp in your browser or manually go to http://192.168.1.1 → Administration → Firmware Upgrade
  • Upload openwrt-wrt54g-squashfs.bin
  • Wait 2 minutes. The router will reboot itself automatically after the upgrade is complete.
  • Your router should now be telnettable at 192.168.1.1. The web interface luci is also available at http://192.168.1.1 . Telnet is disabled and ssh is enabled once a password has been set.
  • Type these commands out in telnet/ssh. This is to ensure that tftp is available, in case your router gets bricked.
nvram set boot_wait=on
nvram set boot_time=10
nvram set wait_time=10 #important for some models
nvram commit && reboot
  • You're done! At this point, you are free to continue using brcm-2.4. However, if you wish to use brcm47xx, proceed below.
  • Download the image openwrt-brcm47xx-squashfs.trx here: http://downloads.openwrt.org/backfire/10.03.1/brcm47xx/
  • Upload using luci at System > Flash Firmware
  • OR, you can simply ssh into the router,

cd /tmp wget http://downloads.openwrt.org/backfire/10.03.1/brcm47xx/openwrt-brcm47xx-squashfs.trx sysupgrade /tmp/openwrt-brcm47xx-squashfs.trx

  • Wait for the router to reboot and login! In case you somehow found out that you can't telnet, then ssh should be possible since your previous settings before flashing remained (unless you used sysupgrade -n)

Using the TFTP method[edit]

Right after flashing at your first login to OpenWrt set the following NVRAM parameters to enable tftpd at bootup:

nvram set boot_wait=on
nvram set boot_time=10
nvram set wait_time=10
nvram commit && reboot

NOTE: Do not touch any other NVRAM parameters. NVRAM is only used as environment for the bootloader. OpenWrt ignores NVRAM parameters.

NOTE: On WRT54GL (at least), you should probably use 'wait_time' instead of 'boot_time'. bg300: Added.

NOTE: On WRT54GS v1.1 too you have to use 'wait_time' instead of 'boot_time', anyway if in doubt add both parameters.

Once you have set the NVRAM parameters above it is possible to use a TFTP client to flash OpenWrt. The TFTP method is also the recommended way to restore the original Linksys firmware or switch to other third-party firmwares.

First download a firmware image file ending in ".bin", e.g. openwrt-wrt54g-squashfs.bin.

Then follow the Generic TFTP flashing instructions.

Flashing Tomato[edit]

Flashing Gargoyle[edit]

Install Guide

Upgrading[edit]

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!

Upgrading OpenWrt[edit]

Using mtd OR sysupgrade[edit]

If you have already installed OpenWrt and like to reflash for e.g. upgrading to a new OpenWrt version. It is important that you put the firmware image into the ramdisk (/tmp) before you start flashing.

cd /tmp/ wget http://downloads.openwrt.org/backfire/10.03.1/brcm47xx/openwrt-brcm47xx-squashfs.trx # The file must be the trx file. mtd write /tmp/openwrt-brcm47xx-squashfs.trx linux && reboot

OR

cd /tmp/ wget http://downloads.openwrt.org/backfire/10.03.1/brcm47xx/openwrt-brcm47xx-squashfs.trx # The file must be the trx file. sysupgrade /tmp/openwrt-brcm47xx-squashfs.trx

Feel free to explore the rest of sysupgrade options by typing 'sysupgrade' in the terminal.

Using LuCI[edit]

  1. Select Administration in the top right corner
  2. Choose the System > Flash Firmware tab
  3. Click Browse and navigate to the firmware (it must be a .trx file) you wish to flash to
  4. Click 'Upload image'
  5. Follow the instructions

Upgrading from Tomato[edit]

The instructions from the Tomato upgrade instructions are confirmed to work with Backfire (10.03.1-rc4, r24045)


Reverting[edit]

Reverting to OEM Firmware from DD-WRT[edit]

  1. Read the peacock announcement found here: http://www.dd-wrt.com/phpBB2/viewtopic.php?t=51486
  2. Do a Hard reset or 30/30/30 on the router according to note 1 of the peacock announcement (30/30/30)
  3. Set a static IP on your computer to 192.168.1.7. Subnet mask should be 255.255.255.0.
  4. Connect the lan cable from your computer to a LAN port of your router. Make sure your router is plugged in. Nothing should be connected to your computer or the router except the lan cable between them. Turn your firewall and any wireless computer connections OFF.
  5. Power cycle the router (uplug the power from the router for 30 seconds and then plug it back in)
  6. Open your browser to 192.168.1.1 by putting that in the browser address window of your browser. You should open the linksys webgui and NOT a page that says Management Mode. If you see management mode, power cycle the router again.
  7. Enter your username and password
  8. Go to administration and firmware upgrade
  9. Navigate to the folder that you are using, and select WRT54G_v4.21.1_fw.bin once you've unzipped it.
  10. Hit upgrade
  11. When you get a success, wait FIVE FULL minutes.
  12. When you can again access the Linksys webgui using a browser at 192.168.1.1, do another Hard reset or 30/30/30 on the router.
  13. Reset your computer ethernet connection to auto IP and auto DNS

JTAG-Serial Info[edit]

JTAG[edit]

JTAG Pinouts[edit]

 nTRST   1o o2	GND
   TDI   3o o4	GND
   TDO   5o o6	GND
   TMS   7o o8	GND
   TCK   9o o10	GND
 nSRST  11o o12  N/C

Using Universal JTAG Adapter

 white    1o o2	 black
   red    3o o4	 GND
  blue    5o o6	 GND
 green    7o o8	 GND
 yelow    9o o10  GND
 orange  11o o12  N/C

DD-WRT JTAG Recovery[edit]

  • /noemw switch required for backup & flash
  • /noemw /nocwd switches required for erase
  1. Backup CFE x2 (Compare the files, they must match exactly or there is something wrong with your JTAG setup)
  2. Erase Wholeflash x2
  3. Flash CFE
  4. Unplug Power
  5. Unplug JTAG Cable

TFTP:

  1. Set Rig ip static 192.168.1.10
  2. Plug network cable from rig to port 1
  3. Get TFTP ready, server ip - 192.168.1.1, Password - blank, file - dd-wrt.v24_mini_generic.bin
  4. Plug in power
  5. As soon as windows says "connected" hit upgrade. May have to use a network hub to make sure windows is always connected.
  6. Hard Reset 30\30\30

Serial[edit]

Serial Pinouts[edit]

 VCC  1 o o 2  VCC
 TX1  3 o o 4  TX0
 RX1  5 o o 6  RX0
 N/C  7 o o 8  N/C
 GND  9 o o 10 GND
Hyper terminal Setup in Windows XP
In Windows XP, Click Start Button - All Programs - Accessories - 
   Communication - HyperTerminal
Enter a name for the connection, Click ok
Choose com port you adapter is plugged into, Click ok
Set:
 Bits per second = 115200
 Data Bits = 8
 Parity = none
 Stop bits = 1
 Flow control = none
Click ok
Click File - Save As, and select a place to save it to so you 
             don't have to enter the settings again.
Putty Setup in Windows XP
After installing putty, run it
 Serial line = The COM port your using for serial (ie. COM3)
 Speed = 115200
Click on Serial under Connection
 Serial line to connect to = same as above (Serial line)
 Speed (baud) = 115200
 Data bits = 8
 Stop bits = 1
 Parity = none
 Flow control = none
Click Session
 Enter a name for your connection under saved sessions
Click Save
Click Open

DD-WRT Serial Recovery[edit]

Modified Redhawk0 instructions

  1. Connect Serial cable
  2. Start one of the programs from above
  3. Get TFTP ready with file selected
  4. Use dd-wrt.v24_mini_wrt54g.bin
  5. Connect power to the router
  6. start a rapid fire Cntl-C as you plug the router to power
  7. type "nvram erase" w/o quotes, hit enter
  8. type "flash -noheader : flash1.trx" w/o quotes, this starts the tftp daemon, hit enter
  9. but have tftp.exe ready
  10. Click go or start on TFTP
  11. give it 5 minutes after it finishes
  12. then power cycle....hard reset...then config
  13. when it stops spitting out txt in the serial consol....hit the enter key...you should get a login prompt...at that point, power cycle it, Hard reset or 30/30/30...then config
  14. you'll see it boot up

USB Info[edit]

No USB

vlan Info[edit]

DD-WRT vlan Info[edit]

Confirmed the WRT54G v2.2 supports port-based vlans via the GUI & nvram.

"/proc/switch/eth0" does exist

WRT54G v2.2's ports are mapped like this:

4 3 2 1 | case labels
3 2 1 0 | nvram port numbers

Defaults[edit]

root@DD-WRT:~# nvram show | grep vlan.ports
vlan0ports=3 2 1 0 5*
vlan1ports=4 5
size: 19306 bytes (13462 left)
root@DD-WRT:~# nvram show | grep port.vlans
port5vlans=0 1 16
port4vlans=0
port3vlans=0
port2vlans=0
port1vlans=0
port0vlans=1
size: 19306 bytes (13462 left)
root@DD-WRT:~# nvram show | grep vlan.hwname
vlan1hwname=et0
vlan0hwname=et0
size: 19306 bytes (13462 left)

GUI[edit]

Port 4 moved to WAN's vlan

root@DD-WRT:~# nvram show | grep vlan.ports
vlan0ports=3 2 1 0 5*
vlan1ports=4 5
size: 19478 bytes (13290 left)
root@DD-WRT:~# nvram show | grep port.vlans
port5vlans=0 1 16
port4vlans=1 18 19
port3vlans=0 18 19
port2vlans=0 18 19
port1vlans=0 18 19
port0vlans=1 18 19
size: 19478 bytes (13290 left)
root@DD-WRT:~# nvram show | grep vlan.hwname
vlan1hwname=et0
vlan0hwname=et0
size: 19478 bytes (13290 left)
root@DD-WRT:~#

nvram[edit]

Port 4 moved to WAN's vlan

root@DD-WRT:~# nvram show | grep vlan.ports
vlan0ports=2 1 0 5*
vlan1ports=3 4 5
size: 19420 bytes (13348 left)
root@DD-WRT:~# nvram show | grep port.vlans
port5vlans=0 1 16
port4vlans=0
port3vlans=0
port2vlans=0
port1vlans=0
port0vlans=1
size: 19420 bytes (13348 left)
root@DD-WRT:~# nvram show | grep vlan.hwname
vlan1hwname=et0
vlan0hwname=et0
size: 19420 bytes (13348 left)
root@DD-WRT:~# lsmod
Module                  Size  Used by
ip_nat_pptp             2560   0 (unused)
ip_conntrack_pptp       3036   1
ip_nat_proto_gre        1664   0 (unused)
ip_conntrack_proto_gre    2584   0 [ip_nat_pptp ip_conntrack_pptp]
etherip                 5104   0 (unused)
switch-robo             5356   0 (unused)
switch-core             6352   0 [switch-robo]
root@DD-WRT:~# ls /proc/switch
eth0
root@DD-WRT:~# cat /proc/switch/eth0/vlan/0/ports
0       1       2       5t*
root@DD-WRT:~# cat /proc/switch/eth0/vlan/1/ports
3       4       5t
root@DD-WRT:~# cat /proc/switch/eth0/vlan/2/ports
3
root@DD-WRT:~# nvram show | grep vlan.ports
vlan0ports=2 1 0 5*
vlan1ports=3 4 5
size: 19560 bytes (13208 left)
root@DD-WRT:~#

Pictures[edit]

DarkShadow's Unit
FCCID Q87-WT54GV22

Notes[edit]

DD-WRT Notes[edit]

Rare 32MB[edit]

anectine17 wrote: The v.2 and v.2.2, on occasion, came with a 32MB RAM chip with only 16MB enabled. The vast majority of these routers came with a basic 16MB RAM chip. To tell whether or not you have the "special" one with the 32MB chip, you have to open the router and read the number on the RAM chip itself. If you have chip #issi is42s16800a-7t, you can enter

nvram set sdram_init=0x008
nvram set sdram_ncdl=0x000
nvram commit
reboot

and that will enable all 32MB. If you have any other chip, that hack will not work...in fact if you try it, you'll end up with a brick. Good luck.

The Hynix chip, HY5DU281622ET-J is the most common one in the v.2 and v.2.2. I've taken apart probably 50 v.2's and a dozen 2.2's and I've seen 2 of the 32MB chips in the v.2.2, and 4 in the v.2. They're out there, but getting harder and harder to come by. Most people hang on to them once they get them.

Hardware Modification[edit]

See Also[edit]