The ros_comm stack contains the ROS middleware/communications packages. These packages are collectively known as the ROS "Graph" layer. They provide implementations and tools for topics, nodes, services, and parameters. This includes the supported ROS client libraries: roscpp, rospy, and roslisp.
Backwards compatibility for C Turtle
C Turtle has an empty version of the ros_comm stack. This is provided so that stacks may update their dependencies for Diamondback but not break dependency compatibility with a C Turtle release.
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ros_comm developers only: release instructions