> For the complete documentation index, see [llms.txt](https://docs.eseye.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.eseye.com/hera204/diagnostics-and-maintenance/device-recovery.md). # Device Recovery The following section describes available options for recovery of malfunctioning device. Should a device become unreachable due to power failure during firmware upgrade, or if its core files were wrongly modified in the file system, Eseye's routers offer several options for recovery. ## Reset button Reset button is located on the back panel of the device. The reset button has two functions: Reboot the device. After the device has powered up, the reset button can be pressed to reboot the device. Start of the reboot will be indicated by the Power LED turning solid red. Reset to factory defaults. After the device has powered on, press the reset button for at least 5 seconds. The device will reset all user changes to factory defaults and reboot. Start of the factory reset will be indicated by the Power LED turning solid red. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.eseye.com/hera204/diagnostics-and-maintenance/device-recovery.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.