Can the Xiaomi MI Robot Vacuum S12 simply be placed in a room and started at the touch of a button on the device or does the corresponding room have to be selected each time using the app? We have 4 cm high thresholds between the rooms and can therefore only vacuum 1 room at a time. We then have to move the robot hoover to the next room by hand. But that's ok. The main thing is that starting is not time-consuming.