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Linksys WRT54G2 v1.0
Linksys WRT54G2.jpg
Wireless-G Broadband Router




Linksys Routers


WRT54G2 v1.0


Linksys WRT54G2 v1.0


Not for 2MB Devices


Not for 2MB Devices


Not for 2MB Devices


Not for 2MB Devices

NOTE: Requires Micro, Do not flash anything else.
NOTE: Requires K2.4, Do not flash anything else.
NOTE: During configuration or flashing a device, the only that should be hooked to the device is the computer and power.



Serial Num. = CSV0
FCC ID = Q87-WRT54G2V1
CPU Type = Broadcom BCM5354KFBG (BCM5354 chip rev 3)
MIPS Rev = ?
CPU Speed = 240MHz
Bus = ?
Flash Type = Parallel
Flash Chip = EON EN29LV160AB-70TCP H25842B 0807TSC
Flash Size = 2MB
Max Firmware Size = 1900544 bytes
RAM Size = 16MB
RAM Chip = hynix 751E C HY57V281620FTP-H
Switch = Broadcom BCM5354KFBG (SoC)
nvram Size = 32kb
Port-based vlan = Yes - GUI and nvram with micro-plus-SSH
802.1q vlan = ?
Ethernet Port Count = 1-10/100-WAN 4-10/100-LAN
Wired Standard = IEEE 802.3?
boot_wait = ?
bootloader = CFE
Flash Card Socket/Type = No
SD/MMC Mod Support = No
MiniPCI slots = No
PoE = No
Power = 12V/.5A
Color of LEDs = Green/Amber
Size = 7.99" x 1.38" x 6.3"
USB = No
Serial Port = Yes
JTAG Port = Yes
Supported by TJTAG/Version = Yes/3.02
Supported by dd-wrt as of = v24 svn10709
dd-wrt K2.4 Support = Yes
dd-wrt K2.6 Support = No
Special Features = ?

Radio (wl0)

Wireless Radio = Broadcom BCM5354KFBG (SoC)
WLAN DSP processor = Broadcom BCM5354KFBG (SoC)
Antenna Connector Type = Internal
Wireless Standard = IEEE 802.11b/g
WiFi Operating Frequency = 2.4GHz
 802.11g = 6, 9, 12, 18, 24, 36, 48, 54Mbps
 802.11b = 1, 2, 5.5, 11Mbps
Radio cor_rev = 13
Radio Capabilities = ap sta wet led wme 802.11d 802.11h rm cqa mbss4
                     afterburner acktiming

Links of Interest


These are instructions for the WRT54G2 V.1 ONLY

  1. Download
  2. Download
  3. Download tftp.exe
  4. Reset the router to defaults on the Linksys Admin page, and let it reboot or manually reboot it after its finished. Read the peacock announcement and take special note of number 11, (how to tftp).
  5. Set your computer to a static IP address of and for a mask and plug ethernet cable into LAN port of the G2v1 unit.
  6. Log in admin page (username is blank, password = admin) and navigate to firmware upgrade page. Browse to the VxWorksKiller-G2V1-new.bin file, press Upgrade and wait 120 seconds for it to reboot on its own, if it does not, then powercycle the router manually. Wait another 12 0seconds and reboot it again. Router should now be listening for tftp transfer of dd-wrt firmware.
  7. Tftp the DD-WRT firmware to the router, use "dd-wrt.v24-10709_NEWD_micro.bin" that you downloaded in step 2; after sucessful tftp, wait 3 min for the router to finish writing new nvram deafults, etc... It should reboot on its own at least two times, so give it 3 min and then go to (If it not reboot on its own, wait another 1 min, and then power cycle it)
  8. When if finishes booting a hard reset on the unit...let it boot again, and configure.
  9. Upgrade the NEWD_Micro.bin build 12548 after you have dd-wrt running, following the steps in note 1 of the peacock announcement
  10. Don't forget to set your computer back to automatically obtaining DHCP and DNS.
  11. Check for recommended builds here.


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 (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. 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!


Warning - There is only one way to revert at this time. Through JTAG and it has a generic mac address that can be fixed with mac clone.

OK...anyone willing to try it with is a "generic" original Linksys wholeflash for the WRT54G2V1.

It has an embedded MAC address of 00:21:29:00:00:01

This MUST be loaded back to the unit with exceptions.

This is an altered/edited wholeflash.bin file from my virgin unit...before dd-wrt was loaded.

[EDIT] - reported to be working.


ridley Reverting WRT54G2 to vxworks WITHOUT JTAG

JTAG/Serial Info


JTAG Pinouts
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
  • /noreset switch required
JTAG Recovery
  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


  1. Set Rig ip static
  2. Plug network cable from rig to port 1
  3. Get TFTP ready, server ip -, Password - blank, file - dd-wrt.v24_micro_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 Pinouts
VCC  1 o
 TX  2 o
 RX  3 o
N/C  4 o
GND  5 o
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
 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
Serial Recovery

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_micro_generic.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 should get a login that point, power cycle it, Hard reset or 30/30/30...then config
  14. you'll see it boot up

vlan Info

Confirmed the WRT54G2 v1.0 supports port-based vlans via the GUI with build 14929.

Confirmed the WRT54Gs v1.0 supports port-based vlans via nvram with build 14848 micro-plus-ssh

WRT54G2 v1.0's ports are mapped like this:

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


root@DD-WRT:~# nvram show | grep vlan.ports
vlan1ports=4 5
vlan0ports=3 2 1 0 5*
size: 17376 bytes (15392 left)
root@DD-WRT:~# nvram show | grep port.vlans
port5vlans=0 1 16
size: 17376 bytes (15392 left)
root@DD-WRT:~# nvram show | grep vlan.hwname
size: 17376 bytes (15392 left)
root@DD-WRT:~# lsmod
Module                  Size  Used by
ip_nat_pptp             2192   0 (unused)
ip_conntrack_pptp       2524   1
ip_nat_proto_gre        1552   0 (unused)
ip_conntrack_proto_gre    2312   0 [ip_nat_pptp ip_conntrack_pptp]
switch-robo             5036   0 (unused)
switch-core             5984   0 [switch-robo]
root@DD-WRT:~# ls /proc/switch
root@DD-WRT:~# cat /proc/switch/eth0/vlan/0/ports
0       1       2       3       5t*
root@DD-WRT:~# cat /proc/switch/eth0/vlan/1/ports
4       5t
root@DD-WRT:~# cat /proc/switch/eth0/vlan/2/ports


root@DD-WRT:~# nvram set vlan1ports="3 4 5"
root@DD-WRT:~# nvram set vlan0ports="2 1 0 5*"
root@DD-WRT:~# nvram commit
root@DD-WRT:~# reboot


root@DD-WRT:~# nvram show | grep vlan.ports
vlan1ports=3 4 5
vlan0ports=2 1 0 5*
size: 17459 bytes (15309 left)
root@DD-WRT:~# nvram show | grep port.vlans
port5vlans=0 1 16
size: 17459 bytes (15309 left)
root@DD-WRT:~# nvram show | grep vlan.hwname
size: 17459 bytes (15309 left)


WRT54G2 v1.0 WRT54G2 v1.0 WRT54G2 v1.0

WRT54G2 v1.0 WRT54G2 v1.0 WRT54G2 v1.0

WRT54G2 v1.0 WRT54G2 v1.0

FCC Pictures

Linksys_WRT54G2_v1.0_FCC Linksys_WRT54G2_v1.0_FCC Linksys_WRT54G2_v1.0_FCC

Linksys_WRT54G2_v1.0_FCC Linksys_WRT54G2_v1.0_FCC Linksys_WRT54G2_v1.0_FCC

Linksys_WRT54G2_v1.0_FCC Linksys_WRT54G2_v1.0_FCC Linksys_WRT54G2_v1.0_FCC


Hardware Modification

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