Abstract: The invention relates to a method of determining the proximity of radio frequency devices using the analysis of a series of receive signal strength indicator (RSSI) values. In particular the invention further relates to a method for the control of a switch based on the proximity of the radio frequency devices.
Abstract: A method of controlling an authorization device arranged to authorize a mobile communication device, the method including the steps of: a central control device generating a control parameter associated with the one or more authorization devices, the central control device communicating the control parameter to the one or more authorization devices, the central control device generating a Bluetooth compatible PIN based on the control parameter, and the central control device communicating the PIN to a mobile communication device.