The number of interconnected devices around us is constantly growing. However, it may become challenging to control all these devices
when control interfaces are distributed over mechanical elements,
apps, and configuration webpages. We investigate interaction methods for smart devices in augmented reality. The physical objects
are augmented with interaction widgets, which are generated on
demand and represent the connected devices along with their adjustable parameters. 
For example, a loudspeaker can be overlaid with a controller widget for its volume. 
We explore three ways of manipulating the virtual widgets: 
(a) in-air finger pinching and sliding, (b) whole arm gestures rotating and waving, 
(c) incorporating physical objects in the surrounding and mapping their movements
to the interaction primitives. We compare these methods in a user study with 25 
participants and find significant differences in the preference of the users, 
the speed of executing commands, and the granularity of the type of control.