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Network Offloader

The Network Offloader makes Ember footage available over a network share with 2.5 Gbps up-link. The solution uses a customized OpenWrt image for the GL.iNet GL-MT2500 (Brume 2) router.

Setup

The Ember connects to the MT2500 with two cables. The router connects to a Multi-Gig network backbone.

Link
From → To
Purpose

USB 3.0 (MSC)

Ember USB 3.0 → MT2500 USB

Ember USB Mass Storage (MSC) disk (exFAT) to be shared via WebDAV.

1Gbps Ethernet

Ember 1 GbE → MT2500 1 GbE

Control & Status via App & API

2.5Gbps Ethernet

MT2500 2.5 GbE → Network

Multi-Gig network backbone uplink

Network configuration

The default configuration is a fixed network setup:

  • Both Ethernet ports are bridged (br-lan = eth0 + eth1) with a static IP of 192.168.1.1/24.

  • The router (br-lan) will request an address over DHCP as to support multiple units on the network.

Network Share (WebDAV)

Ember USB Disk is mounted, as read-only, at /webdav/ember. The router shares /webdav as a WebDAV network share: http://192.168.1.1:5005/ without authentication nor encryption. When the camera is powered off or recording, there will be /webdav/ember will not be present.

WebDAV Command Line

Check the share and list the camera's files:

Download a clip:

⚠️ Windows: use a third-party WebDAV client (not a mapped drive)

Windows' built-in WebDAV redirector is not suitable for Ember footage: it enforces a default per-file size limit of ~50 MB (registry-tunable) and a hard 4 GB ceiling. Ember clips are 25 GB – 200 GB, far beyond that.

Use a dedicated WebDAV client instead — WinSCP is recommended; it speaks WebDAV directly and handles the large files without the redirector's limits.

OpenWRT Image

The freefly-systems/ember-network-offloader repository contains the OpenWRT customization for the Network Offloader solution. Pre-built image for GL.iNet GL-MT2500 is available. See GitHub Releases.

Updating MT2500

❗Configure your system with IP 192.168.8.10 to access the GL.iNet interface at 192.168.8.1.

Boot and setup MT2500 with a root password. Once login, go to SYSTEM → Advanced Settings → Go To LuCI.

Login with the root password from setup. Go to System → Backup / Flash Firmware → Flash New Firmware Image. Select the image based on your router.

  • GL-MT2500 (ABS) tested with GL-MT2500 Airoha (Airoha PHY)

  • GL-MT2500A (Aluminium) tested with GL-MT2500 (MaxLinear PHY)

Do not keep settings, as the image provide a whole new configuration.

❗Configure your system with IP 192.168.1.10 to access the OpenWRT interface at 192.168.1.1.

Login in OpenWRT without any password.

Once connected, Ember disk will be reported in storage section.

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