MultiWii

For the IDE it makes no difference if files are named .cpp or .ino. But they get compiled differently: INO files will be concatenated while CPP/H will be compiled to objects and linked together at a later point. Sure, but that's not quite my point. If there was a .h file for each .ino file, then th...

I'm curious, has the following option ever been considered? Create a .h header file for each existing .ino file, but don't change the .ino files to .cpp files. This would maintain compatibility with Arduino IDE, but would also allow the code to be compiled using C/C++ tools such as Eclipse, AVR Stud...

I'm in the process of setting up something very similar to this! My control board hasn't arrived yet though, so I can't help. I will keep you posted though.

In the mean time, may I ask why you've chosen to use MultiWii version 1.9? Is there a reason that you're not using a newer version?