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Limrox TechAIoT hardware for engineers and integrators
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Firmware updates and recovery

How to update Limrox device firmware safely, and how to recover a device that no longer boots.

Update over the web console

Open System > Firmware, click Check for updates and follow the prompts. The device keeps the previous firmware in a fallback partition and rolls back automatically if the new image fails to boot.

Before you start

  • Keep power stable — use a UPS or PoE during the update.
  • Export your configuration backup first (System > Backup).
  • Do not close the browser tab while the progress bar is running.

Update with a USB stick

Download the .lfw image from Downloads, copy it to a FAT32 USB stick, insert it into the device and choose System > Firmware > From USB.

Recovery mode

If the device fails to boot three times in a row it enters recovery mode:

  1. The status LED flashes amber twice per second.
  2. The device hosts a captive portal at 192.168.4.1 on Wi-Fi AP LIMROX-RECOVERY.
  3. Upload the last-known-good .lfw image there; the device reboots into it.

Force recovery manually

Hold the recessed RESET button for 10 seconds at power-on until the LED turns amber.

If recovery also fails

Devices that cannot reach recovery mode usually have a hardware fault or corrupted bootloader. Contact support with your serial number and the LED blink pattern — we can ship a factory-restore tool for the N1 family.

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