  DroneStick is a novel hands-free method for smooth interaction between a
human and a robotic system via one of its agents, without training and any
additional handheld or wearable device or infrastructure. A flying joystick
(DroneStick), being a part of a multi-robot system, is composed of a flying
drone and coiled wire with a vibration motor. By pulling on the coiled wire,
the operator commands certain motions of the follower robotic system. The
DroneStick system does not require the user to carry any equipment before or
after performing the required interaction. DroneStick provides useful feedback
to the operator in the form of force transferred through the wire,
translation/rotation of the flying joystick, and motor vibrations at the
fingertips. Feedback allows users to interact with different forms of robotic
systems intuitively. A potential application can enhance an automated `last
mile' delivery when a recipient needs to guide a delivery drone/robot gently to
a spot where a parcel has to be dropped.
