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Linksys WRT300N v1.0
Linksys WRT300N v1.1a




Linksys Routers


Linksys WRT300N v1.0


Linksys WRT300N




Support Chart at Bottom



NOTE: Do Not flash DD-WRT micro this router.
NOTE: Requires K2.4 for DD-WRT, 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. = CNP01
FCC ID = Q87-WRT300N
CPU Type = Broadcom BCM4704KPBG CT0542 P11 757088.M5 (BCM4704)
MIPS Rev = R1
CPU Speed = 264MHz
Bus = ?
Flash Type = Parallel
Flash Chip = Intel JS28FR320 C3BD70 A5437913
Flash Size = 4MB
Max Firmware Size = 3801088 bytes
RAM Size = 32MB
RAM Chip = hynix 602U HY5DU281622ETP-J
nvram Size = 32kb
Switch = Broadcom BCM5325FKQMG RD0603 P11 765671A.5
Port-based vlan = ?
802.1q vlan = ?
Ethernet Port Count = 1-10/100-WAN 4-10/100-LAN
Wired Standard = IEEE 802.3/3u
boot_wait = ?
bootloader = CFE
Flash Card Socket/Type = No
SD/MMC Mod Support = No
MiniPCI slots = No
PoE = No
Power = 12V/1A
Color of LEDs = ?
Size = 7.4" x 6.9" x 1.6"
USB = No
Serial Port = Yes
JTAG Port = Yes
Supported by TJTAG/Version = Yes/3.02
Supported by dd-wrt as of = v24 - 06/08
dd-wrt K2.4 Support = Yes
dd-wrt K2.6 Support = No
Supported by TomatoUSB as of = ?
TomatoUSB K2.4 Support = Yes (NoUSB-Std (4MB flash) only)
TomatoUSB K2.6 Support = Yes (NoUSB-Std (4MB flash) only)
Special Features = ?

Radio (wl0)

Wireless Radio = ?
WLAN DSP processor = Broadcom BCM4321LKBG HS0607 p10 EN6561.4 N1
Antenna Connector Type = External Fixed
Wireless Standard = IEEE 802.11b/g/n
WiFi Operating Frequency = 2.4GHz
 802.11n Draft = up to 300Mbps
 802.11g = 6, 9, 12, 18, 24, 36, 48, 54Mbps
 802.11b = 1, 2, 5.5, 11Mbps
Radio cor_rev = ?
Radio Capabilities = ?

Links of InterestEdit

Fixme This section is in need of cleanup!



  1. Download DD-WRT v24 Mini from this link:
  2. Read the peacock announcement found here:
  3. Do a proper HARD reset on your router.
  4. Set your computer to a static IP address of Subnet mask to
  5. Plug a lan cable from your computer to a LAN port on the router. Disable any wireless on your computer
  6. Open your web browser to
  7. Find any settings you might want to keep and copy them down or cut and paste them(e.g. MAC addresses for MAC filtering)
  8. Go to Administration, Firmware upgrade, in the linksys webgui.
  9. Browse to the dd-wrt.v24_mini_wrt300n.bin you downloaded, and hit upgrade.
  10. Wait until you can access the dd-wrt webgui at
  11. Power cycle the router
  12. Wait until you can access the dd-wrt webgui at
  13. Do ANOTHER hard reset on the router.
  14. Go in and set your user name and password by carefully typing each of them in.
  15. Set your computer to auto IP and auto DNS.


Fixme This section is in need of cleanup!


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!


Fixme This section is in need of cleanup!

JTAG/Serial InfoEdit


JTAG PinoutsEdit
Fixme This section is in need of cleanup!
JTAG RecoveryEdit
Fixme This section is in need JTAG Recovery Instructions!


Serial PinoutsEdit
Fixme This section is in need of cleanup!
Hyper terminal Setup in Windows XPEdit
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 XPEdit
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 RecoveryEdit
Fixme This section is in need of Serial Recovery Instructions!


Fixme This section is in need of cleanup!

FCC PicturesEdit

Linksys WRT300N v1.0a FCCa Linksys WRT300N v1.0a FCCb Linksys WRT300N v1.0a FCCc

Linksys WRT300N v1.0a FCCd Linksys WRT300N v1.0a FCCe Linksys WRT300N v1.0a FCCf

Linksys WRT300N v1.0a FCCg Linksys WRT300N v1.0a FCCh Linksys WRT300N v1.0a FCCh

Linksys WRT300N v1.0a FCCi Linksys WRT300N v1.0a FCCj Linksys WRT300N v1.0a FCCk

Linksys WRT300N v1.0a FCCl Linksys WRT300N v1.0a FCCm Linksys WRT300N v1.0a FCCn

Linksys WRT300N v1.0a FCCo Linksys WRT300N v1.0a FCCp Linksys WRT300N v1.0a FCCq

Linksys WRT300N v1.0a FCCr Linksys WRT300N v1.0a FCCs Linksys WRT300N v1.0a FCCt

Linksys WRT300N v1.0a FCCu Linksys WRT300N v1.0a FCCw Linksys WRT300N v1.0a FCCx

Linksys WRT300N v1.0a FCCy


Debricking informationEdit

Here is a thread which contains a JTAG method for debricking your WRT300N v1 and v1.1 model.

For further information about JTAG please see the wiki entry entitled TJTAG.


Once you have completed all of the steps above, your router is already set and ready to be used, configured, etc.

Known IssuesEdit
  • Versions 1.0 and 2.0 of this router have 4MB flash, so JFFS will not work with the standard distros. Version 1.1 has 8MB of flash so may (untested) work with JFFS
  • I use static DHCP for my network and found that this page had strange errors (incorrect labels, missing radio buttons). To fix this, navigate to Administration -> Factory Defaults and then restore the factory defaults to the router.
    • Relatively same issue with MAC filtering where the word "error" replaced labels.
  • When editing settings on the Administration page for the first time (after flash or hard reset), make sure that you change the interface language dropdown to Simplified Chinese, then back to English. Otherwise the router will end up in Simplified Chinese until you either change it, or hard reset the router.
  • If you did not hard reset the router before you installed DD-WRT, then the login information is as follows:
    • Username: root
    • Password: Whatever your password was
    • Hard reset the router if you cannot figure out the login information. Refer here for the default login information.
  • Occasionally after changing a setting, the router will lose its connection to the internet. All you need to do to restore the connection is navigate to the Administration page and scroll to the bottom and hit the Reboot Router button.
    • I recommend that you change all the settings you want to change then reboot the router regardless.
Security LEDEdit
  • The security LED will not light up after flashing on version 1.1. To fix this, go to Administration > Commands, type in the following and then click Save Startup:
while sleep 1; do if [ `nvram get wl0_security_mode` = "disabled" ]; then gpio enable 3; else gpio disable 3; fi; done &

As posted by osmosis

On the wiki for 150N is posted

root@DD-WRT:~# gpio enable 5 #(SECURITY LED - off - green)
root@DD-WRT:~# gpio disable 5 #(SECURITY LED - on - green)
root@DD-WRT:~# gpio disable 3 #(SECURITY LED - on - amber)
root@DD-WRT:~# gpio enable 3 #(SECURITY LED - off - amber)

this applies for the WRT300Nv1.0 as well so to incorporate the amber into the mix as not secure: Also confirmed working on the WRT300N v1.1 WifiShadow 02:40, October 1, 2010 (UTC)

while sleep 1; do
if [ `nvram get wl0_security_mode` = "disabled" ]; then
gpio enable 5
gpio disable 3
gpio enable 3
gpio disable 5
done &

Hardware ModificationEdit

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