Executing control commands dependent on detected presence

A device (1) controllable by short-range point-to-point radio frequency signals, such as Bluetooth signals from a mobile device (23), is configured to receive, for example from the mobile device and adjacent lighting devices (11-12), one or more signals comprising the short-range point-to-point radio frequency signals, determine a change in the received radio frequency signals from the one or more signals, the presence of e.g. A resident (51) is detected based on this change, a control command is determined from the short-range point-to-point radio frequency signal, and the control command is executed depending on the detected presence. 一种可由短程点对点射频信号（例如来自移动设备（23）的蓝牙信号）控制的设备（1），被配置为：例如从移动设备和相邻照明设备（11-12）接收包括短程点对点射频信号的一个或多个信号，根据一个或多个信号确定接收到的射频信号的变化，基于该变化检测例如居民（51）的存在，根据短程点对点射频信号确定控制命令，以及取决于检测到的存在来执行控制命令。