Developer APIs enable developers to create advanced flight modes outside of the flight stack.
This SDK should allow developers to create drone “applications” that can run on mobile devices (tablets, phones) and on-board companion computers, and that can also seamlessly integrate drones with cloud-based services. The SDK should ideally support Python, C++ and Android Developer APIs, including options like ROS, Cloud etc., and also integration with any simulation environment.
ROS is a partner/complementary project of Dronecode that delivers a set of software libraries and developer tools for building and simulating robot applications. PX4 can integrate with ROS via two different APIs — either where native PX4 applications are ROS nodes or where ROS nodes communicate with PX4 via MAVLink (using mavros, a MAVLink to ROS gateway, with UDP proxy for Ground Control Station).