I. Introduction
Robotic devices are intelligent and complicated devices with both actuators and sensors. Many of the devices include internal feedback mechanism, which requires high-frequency successive operations of feedback loops to move smoothly. Autonomous flight of a drone is one such example. It uses high definition videos for monitoring (sensing). It autonomously makes physical movement based on the information from the camera. It monitors its surrounding environment constantly and decides changes of the moving direction to avoid any dangers by nearby objects instantaneously. Its video camera generates video frames in high frequency, such as 30 frames per second (30Hz), and based on the video images, an internal processor generates commands in the same order of frequency. Such intelligent robotics devices with high-frequency feedback are our main focus of IoT devices in this paper.