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Asus RT-N13U

Supported Versions

Version/Model S/N OpenWrt Version Supported Model Specific Notes
original - Barrier Breaker (14.07)
B1 - Barrier Breaker (14.07)

Hardware Highlights

Revision CPU Ram Flash Network Wireless Antenna USB Serial JTag
RT3052 @ 384MHz 32MiB 4MiB 1+4 x100M 2.4Ghz rt2x00 internal Yes Yes Yes but not tested
B1 RT3052 @ 384MHz 64MiB 8MiB 1+4 x100M 2.4Ghz rt2x00 internal Yes Yes Yes but not tested

HW limitations of the switch (see driver source target/linux/ramips/files/drivers/net/ethernet/ralink/esw_rt3052.c):

  • No large frame support (PKT_MAX_LEN at most 1536)
  • Can't have untagged vlan and tagged vlan on one port at the same time, though this might be possible using the undocumented PPE.


To build:

  • Read and follow the build documentation
  • Choose Ralink RT288x/RT305x as target and RT305x based boards as subtarget.
  • The generated firmware you want to use for this device is openwrt-ramips-rt305x-rt-n13u-squashfs-sysupgrade.bin

TFTP Firmware Install


  • Set your computer to a static IP (Other IPs will NOT work).
  • Plug your computer into any LAN port
  • Turn the device off and wait a few seconds. Hold the Restore button in with a pen and insert power. Sometimes Restore button does not work, but WPS button does, use that.
  • Wait until the WPS light blinks slowly and then let go of the Reset button. Your router is now in recovery mode and has the IP Note it will not respond to pings.
  • Send a firmware image using command-line tftp; eg. from Linux:

$ tftp
tftp> binary
tftp> connect
tftp> put openwrt-ramips-rt305x-rt-n13u-squashfs-sysupgrade.bin
Sent 2490464 bytes in 1.2 seconds
tftp> quit

  • or using curl

$ curl -T openwrt-ramips-rt305x-rt-n13u-squashfs-sysupgrade.bin tftp://

  • Wait a minute or two as the device loads the new firmware. You can ping the device at to know when OpenWrt comes online. The WPS light will flash rapidly when OpenWRT begins to initialize, and stay solid when it has finished booting.

This procedure can be used to flash both OpenWRT images or the ASUS factory firmware on the website. If flushing from DD-WRT make sure restore nvram to defaults (otherwise erratic behavior may occur - huge packet loss)

Now follow First Login to learn more about how to set up your device.

Serial Port

Serial port already has headers soldered. It's the 4-pin header in the middle of the board. 3.3V, 57600 8N1. Pin 1 is labeled on the board with a thicker white outline.

Pin 1 Pin 2 Pin 3 Pin 4
Connecting to serial

On Mac OS X: screen /dev/tty.SLAB_USBtoUART 57600

Flash Layout

Asus RT-N13U Flash Layout

FIXME add layout



toh/asus/rt-n13u.txt · Last modified: 2015/09/12 13:27 by tmomas