A controller (1) for performing presence detection with a first sensor system (41,42) and a second sensor system (31-37) is configured to receive sensor signals from the first sensor system and/or the second sensor system. The second sensor system is of a different type than the first sensor system. The controller is further configured to determine which first one or more areas of the plurality of areas are in both the sensor range of the first sensor system and the sensor range of the second sensor system based on the sensor signals and control the second sensor system to perform, with respect to the first one or more areas, a second task other than a first task to be performed by the first sensor system. The first task comprises obtaining sensor data to be used for presence detection in the first one or more areas.