Similar to an operating system, ROS files are also organized on the hard disk in a particular fashion.
Package：The ROS packages are the most basic unit of the ROS software. It contains the ROS runtime process (nodes),
libraries, configuration files, and so on, which are organized together as a single unit. Packages are the atomic build item and
release item in the ROS software.
Package Manifest：The package manifest file is inside a package that contains information about the package, author,
license, dependencies, compilation flags, and so on. The package.xml file inside the ROS package is the manifest file of that
package.
Meta Package：The term meta package is used for a group of packages for a special purpose. In an older version of ROS such
as Electric and Fuerte, it was called stacks, but later it was removed, as simplicity and meta packages came to existence. One
of the examples of a meta package is the ROS navigation stack.
When the product is ready for shipping, the sensor holder is separated from the Scout MINI. User need to use tool to set the
sensor holder on the Scout MINI. Firstly, put the four slider nuts into the slide way each side on the Scout MINI , and then use
the hexagonal tool to screw corresponding four screws on the holder to the platform. Please refer to the figure shown below.
A node may also advertise services. A service represents an action that a node can take which will have a single result. As
such, services are often used for actions which have a defined beginning and end, such as capturing a single-frame image,
rather than processing velocity commands to a wheel motor or odometer data from a wheel encoder. Nodes advertise
services and call services from one another.
3.1.4.2 ROS Service
3.1.4.3 ROS File System
3.2 Start up and shut down
3.2.1.2 Sensors holder and mobile base
3.2.1 Installation
3.2.1.1 Tool
SCOUT MINI R&D Kit
12
Hexagon key
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