ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange |
1 | initial version |
ROS packages can subscribe and publish regardless of the other nodes. (can be ROS/ROS2/Noetic/Melodic) I think your struggle will be with running the ROS Noetic package in a ROS Melodic environment, you have to make sure all the dependencies can be found.
If it's an option for your case I'd settle for one ROS version, or have 2 ROS systems that interact (1 running ROS Noetic, 1 running ROS Melodic)