The object of the invention is an electrical interface module. The electrical interface module has a memory device for storing data and an integrated wireless interface that makes data available to an external reading device, wherein the electrical interface module can exchange data with other nearby electrical interface modules via the integrated wireless interface, wherein adjacent electrical interface modules form a logical bidirectional data bus via the integrated wireless interfaces, wherein data are made available by one nearby electrical interface module or by the other nearby electrical interface modules via the integrated wireless interface(s) in the manner of a bus to the external reading device, and wherein each electrical interface module makes a unique identification available via the integrated wireless interface, so that each electrical interface module is unambiguously identifiable.