I am working on a project that has multiple sketches that need to share a common set of includes. It consists of several Arduinos that communicate via RF chips to each other. Each unit responds to a combination of commands; some shared; some unique to each board. I would rather have just one include file that has all the commands in it to ease in maintaining the project. My problem is I don't know the proper way to do this in the Arduino environment. Do I simply make a "library" that has no code and only the include file or what is the best way to handle this situation.
In other IDE's there would simply be a global area that would be linked to but I do not know how Arduino IDE handles this.
Each module would be complied and loaded separately but use the same structures and defines for the command structure.