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 = ?
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 = ?
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.
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.
Flash firmware. You can use the webgui except if you have a belkin router. (For belkin use tftp.exe to flash)
Wait...at least three minutes. Lights should return to normal. See important2, below. Failing to wait is how most people brick their routers.
Do a power cycle of the router. (Unplug the cord, count to 30 and plug it back in.)
Wait for the lights to return to normal usually about 2 minutes.
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.
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!
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 File - Save As, and select a place to save it to so you
don't have to enter the settings again.
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
Enter a name for your connection under saved sessions
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:
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.
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