Aggregation of sensor appliances using device registers and wiring brokers

The invention provides for a computer system (300, 400), comprising a device register (320, 410) for creating and registering one or more device objects (322, 324, 326, 412). At least one device object of the one or more device objects is configured for communicating with a network connector (404) of a sensor appliance (306, 308, 310, 402) via a network connection (312, 414). The device object is configured for exposing at least one parameter of the sensor appliance by declaring its capabilities. The computer system further comprises an aggregation model (334, 422) for aggregating the at least one parameter of the at least one device objects; a set (340, 416) of wiring definitions descriptive of raised events created by changes or updates in the at least one parameter; and a wiring broker (328, 420) for updating the aggregation model in accordance with the raised events.