System Introspection for System Analysis on Mobile Devices

even complex in<strong>for</strong>mation can be transferred to and displayed on a mobile device.The communication also can be handled over the internet, which allowsthe system to send the data to devices all over the world. The developer canbe miles away to check the robots state and give advice <strong>for</strong> users at the localside. Like the resources on a robot the resources of mobile devices are surelylimited. The system needs to be lightweight and save resources as much aspossible. For example, when observing the robot the mobile phone should notuse up all the battery within 5 minutes.1.3 Use Cases: What a Developer does with the<strong>System</strong>In the appendix of this thesis the use cases <strong>for</strong> the interaction between a developerand the system attached to the robot are described. Important usecases are the request <strong>for</strong> in<strong>for</strong>mation of the components on the robot and therequest <strong>for</strong> components to be logged.The use case “Request a component” explains the way how a component isrequested from the robot. When the expert is successfully connected to theobservation system, he can request the list of components offered by the system.Selecting a single component will trigger the component on the probe to startpublishing its in<strong>for</strong>mation. The in<strong>for</strong>mation is displayed as different views onthe mobile device.The use case “Request components to be logged” starts a logging cycle on theprobe. This cycle collects data from selected components, filters it to the needsof the developer and prints them to a logging file. The developer can selectfrom available components on a selection view and execute the cycle. Whilethe system probe is collecting, it creates temporary files <strong>for</strong> backup. When thedeveloper stops the cycle or disconnects from the probe, the collected data willbe saved as a unique file on the file system.1.4 OutlineComponents running on a robot can be hard to observe. In this thesis a systemis designed and implemented, that allows to filter in<strong>for</strong>mation from componentsof the robot and collect them into several views on external devices like mobilephones. Chapter 2 introduces some work that is related to the the systemcreated in this thesis. Chapter 3 describes the requirements <strong>for</strong> the systemand chapter 4 explains the systems environment. Chapter 5 covers the design3