Abstract: Among others, the invention relates to a method and a system for controlling a system for receiving a wireless data transmission between at least two components (12, 100, 50), wherein at least one wireless interface (102, 112) can be activated, or is activated, for wireless data transmission. According to the invention, a first component (100) monitors an environment for the occurrence of at least one predefined change and/or for the occurrence of at least one predefined feedback from the environment. Once such a change, or feedback, has occurred, a wireless interface (102) is activated for the wireless data transmission, and optionally for the energy supply of a second component (50) via the wireless interface. The predefined change or feedback is caused particularly in that the second component (50) is returned to the environment. The system may be a system (10) for determining the identity and/or authorization, such as a locking system.