When programming a robot, we might have to define robot parameters, such as robot controller gains P, I, and D. When the number of parameters increases, we might need to store them as files. In some situations, these parameters have to share between two or more programs too. In this case, ROS provides a parameter server, which is a shared server in which all ROS nodes can access parameters from this server. A node can read, write, modify, and delete parameter values from the parameter server.
We can store these parameters in a file and load them into the server. The server can store a wide variety of data types and can even store dictionaries. The programmer can also set the scope of the parameter, that is, whether ...
