LibreMesh

What LibreMesh is

LibreMesh is a free, modular framework for creating OpenWrt-based firmware for wireless mesh nodes. It is intended for people building decentralized, community-run wireless networks. Its codebase provides defaults for Babel, B.A.T.M.A.N. advanced, BMX7, and OLSR; the default network design combines BATMAN-adv at layer 2 with Babel at layer 3 to support roaming and network segmentation. A default flavor is described as ready to work without manual configuration, and the project aims to make mesh setup and management accessible through a web interface usable on smartphones.

You can request a tailored firmware build using the online ImageBuilder selector, compile LibreMesh on a host, or use archived precompiled releases. The project recommends routers with at least 16 MB of flash and 128 MB of RAM, though installation is possible on devices with 8 MB of flash and 64 MB of RAM. Configuration files can be handled with OpenWrt UCI or edited manually; LuCI file management is available by installing luci-app-filemanager. LibreMesh is on-premises firmware and is free to use, copy, modify, and distribute under the AGPL license. The project advises tailoring builds to preserve firmware space and device RAM, and warns against upgrading packages directly.

Who it suits

LibreMesh suits people and groups creating decentralized, community-run wireless mesh networks with OpenWrt-based routers. It is a fit for users comfortable building or selecting firmware and managing configuration through UCI, manual edits, or the available web interface.

Limits

The project recommends 16 MB flash and 128 MB RAM, while noting that installation is possible on 8/64 MB routers. Builds may need customization to preserve firmware space and device RAM.

Getting started

1. Visit the LibreMesh website.
2. Choose a firmware route: request a build through the online ImageBuilder, build on a host, or use an archived release.
3. Check that the router has suitable flash and RAM for the chosen build.
4. Install the firmware on the router.
5. Manage configuration with OpenWrt UCI or edit configuration files manually.

Verdict

Choose LibreMesh if you want a free, modifiable framework for building community-run wireless mesh networks with OpenWrt-based firmware. It provides useful protocol defaults, but router memory and flash constraints mean builds may need tailoring to fit a device.