  Network emulation is a well-established method for demonstrating and testing
real devices and mobile apps in a controlled scenario. This paper reports
preliminary results for an open-source extension of the CrowNet pedestrian
communication framework. It enables the interaction between simulated and real
devices using the emulation feature of OMNeT++. The interaction is handled by
several OMNeT++ modules that can be combined to match different use-cases.
Initial timing measurements have been conducted for an example application
which creates decentralized pedestrian density maps based on pedestrian
communication. The results indicate that the approach is feasible for scenarios
with a limited number of pedestrians. This limitation is mainly due to the
real-time simulation requirements in coupled emulation.
