Ubiquiti AirRouter/AirRouterHP

Installing the firmware

This guide works for both the AirRouter and the AirRouterHP models and no additional modifications needs to be made before flashing the image.

  1. Find the latest Attitude Adjustment image named openwrt-ar71xx-generic-ubnt-airrouter-squashfs-factory.bin or openwrt-ar71xx-generic-ubnt-airrouter-jffs2-factory.bin
  2. Connect to the router with an ethernet cable, flashing over Wi-Fi is not recommended!
  3. Log in to AirOS on the Router and open the System tab
  4. Flash the open-wrt image you downloaded earlier using the firmware update utility in AirOS (make sure you're flashing the file that ends with -factory.bin or you will probably brick your router)
  5. After a few minutes the router will restart and you can login on your router on

Reverting to AirOS

  1. Download the AirOS firmware
  2. Turn off the device and connect to the device with an ethernet cable
  3. Set the computer to or different but not to 192.168.20
  4. Press the reset button while plugging in the power and hold the reset button for ~10 seconds
  5. Ping the IP, if you don't get a response repeat previous step
  6. Upload AirOS using the tftp binary:
    $ tftp
    tftp> mode binary
    tftp> put XM-v5.5.2.build14175.bin flash_update
    Sent 6736122 bytes in 9.4 seconds
    tftp> quit
  7. After the leds have changed you should wait a couple of minutes just in case
  8. Restart the router, by plugging out the power and replug it
  9. AirOS will be accessible on

Serial Port

The board has a non-populated pinhead J3 (also labeled as UART) with a TTL (3.3V) level serial port as described:

3 RX
9 TX
11 GND

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toh/ubiquiti/airrouter.txt · Last modified: 2014/03/25 22:56 by eudoxos