First of all; the week scheduler works the following controllers: EcHo, EcHo Plus, SieRRa II. TanGo, AlFa II and DelTa, as they all have an NEB port.
In Project Designer you'll have to add the NEB Port Expansion in order to get the real time clock and the battery function, which is on the Port Expansion.
Start by adding the NEB Port Expansion to your controller in the Systems page.
In the Feedback section you can then create up to 20 events on a specific time of day in the week in the scheduler and make these events go and press a button. You can choose to press the physical button or you can choose to press a button in the graphical interface, e.g. on a SieRRa II.
Top tip: If you want to create an action which is not something you have on an existing button, you can create a hidden page (A page with no "Jump page" function) and execute whatever you like on this particular button.