As a part of my research I need to have two Raspberry Pis and a Pixhawk all within the body of a UAV. I know I can get one Pi connected to the Pixhawk over mavlink, but how can I get the two Pis talking to each other. The three devices will all be effectively adjacent to each other, and due to the large interference (ESCs etc) within the drone i'd rather stick to wired.
Additionally, weight and power is a concern so i would rather avoid using any extra components if possible.
