Robot Operating System Cookbook

How it works...

In the previous section, we learned about important elements in the ROS computational network to start with. Following that, in this section, we will warm up using these elements. Let's get started with practicing with the ROS master.

ROS master works much like a DNS server. Whenever any node starts in the ROS system, it will start looking for ROS master and register the name of the node with ROS master. Therefore, ROS master has information about all the nodes that are currently running on the ROS system. When information about any node changes, it will generate a call back and update with the latest information.

The node will provide the details of the topic, such as its name and data type, to ROS master before the node ...