Method for transmitting data between a first and a second module (1, 4), wherein the first module comprises transmitters for light and also light-sensitive receivers, wherein the second module comprises transmitters for light and also light-sensitive receivers, characterised in that - in a first method step, the time base of the first module is synchronised with the time base of the second module, - in a second method step, the transmitters of the first module each emit a light signal pulse individually one after the other and/or in numerical order within a particular time range, in particular a time slot, - wherein the particular receiver of the second module at which the strongest receive signal occurs, in particular during the execution of the second method step, is determined, in particular by control electronics of the second module, wherein the particular time range, in particular the time slot, and/or the number of the particular time range in which the strongest receive signal occurs is/are determined, - in a third method step, the determined time range and/or the determined number is/are communicated from the second module to the first module, - in a fourth method step, the particular transmitter of the first module that is associated with the determined time range and/or the determined number is determined, in particular by control electronics of the first module, and is used for the subsequent transmission of data from the first module to the second module, wherein at least one of the modules has a preferential direction, either as a result of differently radiating light cones of the transmitters or as a result of corresponding receive cones, i.e. light-sensitive regions, of the receivers, in particular wherein at least the second, third and fourth method steps are carried out recurrently over time. wherein the first module comprises transmitters for light and also light-sensitive receivers, wherein the second module comprises transmitters for light and also light-sensitive receivers, characterised in that - in a first method step, the time base of the first module is synchronised with the time base of the second module, - in a second method step, the transmitters of the first module each emit a light signal pulse individually one after the other and/or in numerical order within a particular time range, in particular a time slot, - wherein the particular receiver of the second module at which the strongest receive signal occurs, in particular during the execution of the second method step, is determined, in particular by control electronics of the second module, wherein the particular time range, in particular the time slot, and/or the number of the particular time range in which the strongest receive signal occurs is/are determined, - in a third method step, the determined time range and/or the determined number is/are communicated from the second module to the first module, - in a fourth method step, the particular transmitter of the first module that is associated with the determined time range and/or the determined number is determined, in particular by control electronics of the first module, and is used for the subsequent transmission of data from the first module to the second module, - in a first method step, the time base of the first module is synchronised with the time base of the second module, - in a second method step, the transmitters of the first module each emit a light signal pulse individually one after the other and/or in numerical order within a particular time range, in particular a time slot, - wherein the particular receiver of the second module at which the strongest receive signal occurs, in particular during the execution of the second method step, is determined, in particular by control electronics of the second module, wherein the particular time range, in particular the time slot, and/or the number of the particular time range in which the strongest receive signal occurs is/are determined, - in a third method step, the determined time range and/or the determined number is/are communicated from the second module to the first module, - in a fourth method step, the particular transmitter of the first module that is associated with the determined time range and/or the determined number is determined, in particular by control electronics of the first module, and is used for the subsequent transmission of data from the first module to the second module, wherein at least one of the modules has a preferential direction, either as a result of differently radiating light cones of the transmitters or as a result of corresponding receive cones, i.e. light-sensitive regions, of the receivers, in particular wherein at least the second, third and fourth method steps are carried out recurrently over time.