A Control Engineering Framework for Quadrotors: An Application for the Crazyflie 2.X Topics: Engineering Applications on Robotics and Automation; Guidance, Navigation and Control; Mobile Robots and Autonomous Systems; Robot Design, Development and Control; Vehicle Control Applications In Proceedings of the 18th International Conference on Informatics in Control, Automation and Robotics ICINCO - Volume 1, 359-366, 2021