A method for controlling an external device (6-8, 10) having a wireless communication function (6a-8a, 10a), in which an application is executed on a mobile digital terminal (1), in particular a tablet or smartphone, and sequentially outputs digital content which changes over time by an output unit of the terminal (1), which content, in addition to the data (2a) to be output, contains a number of embedded or linked control commands which are sequentially executed by a respectively associated module (1a, 1e) of the mobile digital terminal when sequentially displaying the content in accordance with flow control (1c) of the mobile digital terminal (1), and in which, when at least one particular control command from the number of control commands is reached, a wireless communication module (1e) of the mobile digital terminal (1) is used to wirelessly control the external device (6-8, 10) in order to cause a function of the external device (6-8, 10) in a substantially synchronous manner with the display of the content or a content section.