ROS2 Launch: Analyzing Node Startup Without Topic Information

The provided output from a ROS2 launch file shows the successful startup of two nodes: 'socket_can_receiver_node_exe-1' and 'pe_ars408_node-2'. However, there is no information about any topics being published or subscribed to.

This indicates that the launch file likely focuses on setting up and running these nodes without explicitly defining any communication channels (topics) between them. The nodes might be communicating through other mechanisms, such as services or direct inter-process communication.

To confirm this and determine the communication methods used, you can investigate the following:

• Node Code: Examine the source code of the nodes themselves to identify any topic-related operations like publishing or subscribing.
• Launch File: Check the launch file for any declarations of topics or related components, such as topic remappings.
• ROS Master: Use the rosnode info command to inspect the nodes and their associated topics.

By investigating these aspects, you can gain a deeper understanding of the communication behavior of the launched nodes and identify the absence or presence of topic-based interactions.