I have a simple questions but can't seem to find any info.

I am using an Arduino as an action node. Eventually, the node will not need the ros.h header at all but in my testing I decided to set it up as a subscriber just to get my function to work.

This brought up the question... Can I include Pusblisher/Subscriber and other ROS headers without including the full ros.h? I found the headers I'm looking for under ros_lib/ros/publisher.h / subscriber.h/ nodehandle.h .... but using

#include "ros/publisher.h" 

doesn't work.

How can I include these headers specifically to save space in the arudino RAM?

LET ME KNOW WHAT OTHER INFO YOU MAY NEED. I am in a coffee shop about to leave on a business trip so I didn't have much time to give much detail...sorry and thank you!