  Small mobile robots are an important class of Search and Rescue Robots.
Integrating all required components into such small robots is a difficult
engineering task. Smartphones have already been made small, lightweight and
cheap by the industry and are thus an excellent candidate as main controller
for such robots. In this paper we outline how ROS can be used on Android
devices and then evaluate one sensor which is very important for mobile robots:
the Inertial Measurement Unit (IMU). Experiments are performed under static and
dynamic conditions to measure the error of the IMUs of three smartphones and
three professional IMUs. In the experiments we make use of a tracking system
and an autonomous mobile robot.
