The development of Ambient Assisted Living systems would be facilitated if there was a development environment that allowed to simulate in a computer the physical environment, its inhabitants, as well as the Ambient Assisted Living system. This requires, on the one hand, an infrastructure for simulating the physical environment and, on the other hand, an infrastructure for emulating the Ambient Assisted Living devices. Both can be interconnected through data streams that allow emulated devices to behave as if they were connected to the real world, since they get similar sensor input. This paper introduces advances on a simulation framework for ambient intelligence so that it becomes capable of producing such data streams.