RobotnixAcademy

Unit 11 · lesson

Prerequisite Checkpoint: Inspect One Node Deeply

A list proves presence. ros2 node info reveals relationships.

Inspect one supplied or local node and record:

  • publishers;
  • subscribers;
  • services;
  • action relationships if present;
  • the exact node name used for inspection.

Bridge question

Which relationships are runtime evidence, and which higher-level conclusions are still assumptions?

For example, seeing a publisher relationship to /scan does not prove the messages are physically accurate or that a Java application consumes them.

Produce a short Node Relationship Record with:

observed relationship:
what it proves:
what it does not prove:
next evidence needed:

Do not turn this into a full ROS graph lesson. If node info is new, reactivate the ROS prerequisite first.