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# Short firmware links These links download the same firmware bytes as the original GitHub release, with shorter filenames. Each link is pinned to one version and verified against its SHA-256 checksum when the site is built. Existing links keep their original firmware; a new release gets a new link. For **RAK4631 Full Companion**, use the **UF2** for a bootloader-drive drag-and-drop update. Use the **DFU ZIP** when pasting a custom download URL into the Windows or Linux MeshCore firmware tool. The ZIP is the native application update package, not the release's download bundle. These files do not install a bootloader or SoftDevice. The 1.17.1.10 preview2 files are for MeshTalk testing with Keymind Cascade and USA Cascade defaults. The original release includes instructions, qualification reports and checksums. See the [firmware picker](firmware_picker.md) for other board and release choices. ## Adding links for another release Add an entry to `docs/_data/firmware_shortlinks.json` with a unique, version-specific filename, exact release tag and asset name, byte size, label and SHA-256 checksum from the validated release. Keep the original firmware extension. Never change or remove a published filename's version, source or checksum. Labels can be corrected without changing the download. The documentation build downloads and verifies the pinned files before publishing them under `d/`. A missing asset, incorrect checksum or changed published link stops deployment instead of publishing a different image.