@Alex-Kushleyev Thanks for getting back to me. The end goal is that I would like to create an application that will be working with VOXL's serial ports, similar to the examples. I saw here that I will need to make use of the voxl_io library to do so. I am just not sure what the correct process is to actually include this library in my code. Let's say I make a new .c file on my VOXL2. What's the correct process for getting the voxl_io library to be included with this so that I can have it compile and run while using functions from the library? Could you provide me with some steps or a guide on how I can include this library in a program so it can reference it?