For our knob we chose a design which is based on older faucet handles. The kob has ten rounded corners for better comfort while controlling the interface. The knob itself has the ability to be rotated and can also be moved on the X, Y and also the Z axis to access the different levels of the interface.
On the top of the knob are also two buttons, placed to skip music titles very fast without the need to access the menu.
The mobile application is used to to see a detailed view of the water consumption, set up the different modes to fit the users needs and the user profiles. The syncronization of the music library is also set up via smartphone. The user also has the opportunity to set the preheat temperature for the shower to solve the problem with standing inside a shower and recieving cold water.