Intro to ROS -- ROS Tutorials 0.5.2 documentation

Let's look at the ROS system from a very high level view. No need to worry how any of the following works, we will cover that later. ROS starts with the ROS Master. The Master allows all other ROS pieces of software (Nodes) to find and talk to each other. That way, we do not have to ever specifically state "Send this sensor data to that computer at 127.0.0.1. We can simply tell Node 1 to send messages to Node 2. How do Nodes do this?