Hi sonium,
Could you please elaborate on how you managed establish a physical connection between RPi and Openlink software? Are you using a USB port? If so, I remember the documentation was saying that if you connect a PC (Mac, Linux, whatever) to the USB port, the CC3D hardware (LibrePilot) will shutdown all other rest of the external connections in order to maker sure that you don't burn your PC. If so, how can you gather information while flying?
Thank you!