The autopilot has a 4 GB eMMC flash memory that comes pre-flashed and provides: Linux 3.8 kernel compiled with the PREEMPT option (best results we measured) Debian Wheezy file system ROS Hydromedusa mavros ROS package APM running natively in Linux (and linked with ROS through mavros) preconfigured daemons for launching everything automatically, WiFi dongles support Erle-brain has been successfully tested in copters, planes and rovers. Thanks to the contribution of many there're drivers for most of the sensor and we keep working hard to provide support for even more accessories. Learn more: https://erlerobotics.com/blog/erle-brain/