Abstract: A rain detection device for sensing rain drops on a surface includes at least one sensor unit and at least one evaluation unit. The sensor unit includes at least one capacitive sensor element. The sensor element is configured such that a capacitance characteristic of the sensor element changes based on an object contacting the surface. The evaluation unit is configured to detect rain drops on the surface based on a differential signal of the sensor element. The evaluation unit is configured to detect a rain drop on the surface based on a symmetry characteristic of the differential signal with respect to a zero point.

Abstract: The invention relates to a method for operating a service in an environment outside a mobile electronic device. The service is able to be operated by means of a host system with a human-machine interface adapted to the environment. The mobile device is brought into communication with the host system which senses the operability of the service by the mobile device, the host system is downloaded with a proxy for operating the service and the service operation is transferred onto the host system by means of its human-machine interface. The host system comprises means for reproducing information, controlling means for a user, a communication processor, a memory for storing a proxy software for operating a service and a processor for operating the proxy software.