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OpenWrt support for N2QF and Tube-U4G

Quick start guide

OpenWrt based firmware

Download the prebuilt OpenWrt based firmware here: Download

Connect devices

Prepare following equipments and connect them as illustration below:

  • Computer(PC/NB)
  • PoE adapter
  • Tube-U4G
  • N2QF
  • 4G/LTE SIM card

Reflash firmware with Web fail-safe mode

  • Power off
  • Keeping press reset button and power on N2QF
  • Release reset button right after the ethernet LED blink 3 times (The LED will have a short fast blinks when Web fail-safe mode enabled)

Setup computer with static IP mode, and set the IP to

Open with browser, it will display following Web fail-safe page:

Select the OpenWrt based firmware for N2QF and click "Update firmware".

Wait around 5 minutes for the device to finish firmware reflash.


There is no sign indicating the end of process. Just reconnect the device directly after a proper period of time. The process won't break the bootloader code. So it's safe to power off and retry again.

Setup 4G/LTE

Setup computer to DHCP mode. The computer should obtain an IP 192.168.1.### from N2QF DHCP server.

After getting IP, open with browser:

Click Login button to login without password.

Enter "Network >> Interfaces" page and click "Add new interface..." button

Fill the form with following values and then click "Create interface":

  • Name: wwan
  • Protocol: ModemManager

Fill the options in the "General Settings" tab with following configurations

  • Protocol: ModemManager
  • APN: internet

Change to "Firewall Settings" and adjust settings:

  • Create / Assign firewall-zone: wan(empty)

and then click "Save"

Noticing that the page showing pending changes and click "Save & Apply" to apply the changes.

Wait 10~20 seconds for 4G/LTE connection establishing, it will show connected information with Uptime and IPv4 values.

Turn on WiFi Radio

The default WiFi Radio is off.

Enter the page "Network >> Wireless" and click "Enable" button.

After 3~5 seconds, the radio should be running and start broadcasting WiFi signal with SSID=OpenWrt.