# Content ## Hardware details For self-built hardware, it is recommended to have a special repository for its description and link it with a URL or as a submodule here. For any hardware, you should provide a user guide with the following information: - How to check the hardware is working: calibration, validation - Troubleshooting guide, common issues - What was bought were? - What was custom-built, by whom and how ? - Critical hardware parts, what could be modified? - Schematics and/or photos (lots of photos)