By clicking on the fourth button at the bottom of the dashboard (to the right of the mode & shortcuts) you can see your timeline. Here you will see detailed information about everything that has happened in your household.
Who adjusted the temperature to 21°C (70°F)? Who let the plumber in at 12 noon?
All notifications are stored in the timeline. All doors and windows that are open or closed, all lights and appliances that are turned on or off. If you move or rename a device, it will also be updated in the timeline.