Method for setting up a control unit as participant in a building installation network , wherein the control unit , a display unit , at least one actuator which can be controlled via at least one API command (application programming interface command) to carry out at least one action and an internet gateway are integrated into the building installation network and wherein the control unit comprises at least one manually operated switching sensor , which method is carried out with the following steps: - Detecting the at least one actuator integrated in the building installation network by the control unit , - Retrieving at least one data record on the at least one detected actuator from a central server via internet via the internet gateway by the control unit , wherein the data record comprises at least one raw API command, one algorithm by which the raw API command can be individualized to be an executable API command and information on the action the actuator carries out when controlled by the API command, - Transmitting information regarding the at least one actuator , details on the at least one possible action of the at least one actuator and operation events detectable by the control unit of its at least one manually operated switching sensor to the display unit by the control unit , - Displaying the information, the details and the operation events detectable by the control unit of its at least one manually operated switching sensor on the display unit , - Assigning by the user of at least one action to be carried out in relation with the at least one actuator to an operation event to be detected by the control unit , - Transmitting the assignment to the control unit , - Individualization of the at least one raw API command corresponding to the assigned action by creating an executable API command, using the algorithm assigned to the raw API command by the control unit , - Storing the individualized API command in a memory of the control unit . - Detecting the at least one actuator integrated in the building installation network by the control unit , - Retrieving at least one data record on the at least one detected actuator from a central server via internet via the internet gateway by the control unit , wherein the data record comprises at least one raw API command, one algorithm by which the raw API command can be individualized to be an executable API command and information on the action the actuator carries out when controlled by the API command, - Transmitting information regarding the at least one actuator , details on the at least one possible action of the at least one actuator and operation events detectable by the control unit of its at least one manually operated switching sensor to the display unit by the control unit , - Displaying the information, the details and the operation events detectable by the control unit of its at least one manually operated switching sensor on the display unit , - Assigning by the user of at least one action to be carried out in relation with the at least one actuator to an operation event to be detected by the control unit , - Transmitting the assignment to the control unit , - Individualization of the at least one raw API command corresponding to the assigned action by creating an executable API command, using the algorithm assigned to the raw API command by the control unit , - Storing the individualized API command in a memory of the control unit . <EOS>