The functional requirements specify what the espresso machine is supposed to do . Each requirement has a user story and a priority. The stories state what the user expects in the end product, that implies hardware capabilities and feature set of the Rust firmware.
ID Title User Story Priority Status
F001 Repeatability As a coffee drinker, I want to pull espresso shots with repeatable temperature profiles. high done F002 Temperature As a coffee drinker, I want to set the target water temperature, so that I can adjust the machine to my coffee beans. high done F003 Steam As a coffee drinker, I want to put the machine in steam mode, so that I can steam milk. medium planned F004 Pressure As a coffee drinker, I want to adjust the brew pressure, so that I can experiment with novel brewing techniques. low planned F005 Brew Information As a coffee drinker, I want to know water temperature and brew pressure, so that I know if I need to adjust my preparation method. high done F006 Temperature Accuracy As a manufacturer, I want to temperature controller to achieve +/- 3°C accuracy (without water flow), so that the machine delivers repeatable results. medium done F007 User Analytics As a manufacturer, I want to log machine usage and state to a server, so that I can improve the espresso machine design. medium done F008 Eco Mode As a manufacturer, I want the machine to turn off when its not used for more than 20 min. medium planned F009 Debug Information As a student, I want the machine to provide as much internal information as possible, so that I can debug my application easily. low done