The CSensrvChannelFinder class provides an API that allows clients to discover the sensor channels supported by Sensor Services and receive notifications when channels are installed and uninstalled.

The channel specific header files e.g. for orientation, acceleration, proximity, will document whether a secure id, vendor id or a set of capabilities, if any, is required by the client to be able to view a channel or receive notifications for it. See the channel specific header files for these requirements.

On instantiation of this class a session connection to the Sensor Server is made. The Sensor server is a transient server and is started, if not already running, when a session connection is made. The sensor server is shutdown when a device-configured timeout period expires after the last session connection has been dropped. The Sensor Server will not shutdown if there is a session connection to it.

Each item in RSensrvChannelInfoList returned by FindChannelsL() contains a channel Id which is only valid for the lifetime of the sensor server. If a client requires that this id remains unchanged then the client must ensure that an instance of either CSensrvChannelFinder or CSensrvChannel remains instantiated. This keeps a session connection with the server open which prevents the sensor server from shutting down.