a method for wirelessly transmitting data to a control unit , such as a blasting machine , selected from a plurality of control units from an operating device selected from a plurality of operating devices , and a system intended for the method . the control unit is connected to a plurality of detonators , which are controlled by the control unit via an electrical wire or a fuse . the operating device is associated with the appropriate control unit in a step in which address data and / or encryption data is exchanged between the units . only one operating device can be associated with a pre - determined control unit at any given moment . the data transmitted in accordance with the method preferably comprises at least a fire command , which instructs the control unit to fire the detonators .