Supported Versions

Version/Model Launch Date OpenWrt Version Supported Model Specific Notes
RT-N56U 2011 Breaker Barrier 14.07 Workaround required for 5 GHz radio

Hardware Highlights

CPU Ram Flash Network USB Serial JTag
MIPS 74Kc@533MHz 128MiB 8MiB 4 x 1000 Yes 2.0 Yes Yes?


OEM easy installation

→ Administration → Firmware Upgrade → Choose openwrt-ramips-rt3883-rt-n56u-squashfs-factory.bin.

OEM installation using TFTP
  • Unplug router power cord
  • keep reset button down
  • plug the power cord back
  • release the reset button.
  • led blinks slowly when ready for flashing
  • Assign your PC on eth0
  • tftp
  • tftp> bin
  • tftp> put openwrt-ramips-rt3883-rt-n56u-squashfs-factory.bin

Basic configuration

5 GHz radio

OpenWrt does not initialize the 5 GHz radio correctly by default. To make it work, you will have to:

  1. Set the country code to a specific country on BOTH the 5 GHz radio AND the 2.4 GHz radio.
  2. Go to System → Startup, scroll down to Local Startup, add the line "sleep 2 && /etc/init.d/network restart" before the line "exit 0", and click Submit.
  3. Click System → Reboot → Perform reboot.



Architecture: MIPS
Vendor: Ralink
System-On-Chip: RT3662 (MIPS 74Kc V?.?)
CPU/Speed MIPS 74Kc @ 500 Mhz
Flash size: 8 MB
RAM: 128 MiB
Wireless: Ralink RT3662 + RT3092
Ethernet: RealTek RTL8367M Gigabit w/ vlan support swconfig
USB: Yes 2 x 2.0
Serial: Yes 57600

Opening the case

Remove the screws first, then use your nails.


|    XXXX        | GND RX TX 3.3
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toh/asus/rt-n56u.txt · Last modified: 2014/11/09 09:49 by alex.henrie