[quote user="Johan Forsl��f"]No, I just meant that I had assumed that the standard values in the demo projects shipping with SimpliciTI would be intended for communication at "useful" distances (across a room at least.)[/quote]
Well, you assumed good. At highest power setting device should have range of kilometres (clear path). Maybe your devices are actually too close and saturate?
The best solution is to grab development kit and play with SmartRF settings.
Regards,
Maciej