> For the complete documentation index, see [llms.txt](https://admin-things5.gitbook.io/things5/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://admin-things5.gitbook.io/things5/device/manage-firmware.md).

# Manage Firmware

Manage device firmware and variables

Firmware in T5 represent the set of variables of the model of a device, that is the virtual representation of the real physical machine or better of its model.

Each model must therefore hold at least one firmware in which to declare those variables, that could be different from version to version.