Hovers the drone based on optical flow made for Linux video Devices. Computes Pitch- and roll attitude from downward looking camera looking at a textured floor. It can be used to determine speed when navigating without GNSS — in buildings, underground, or in any other GNSS-denied environment. The video below shows PX4 holding position using the Ark. Paparazzi is a free software Unmanned Aircraft System. nl/islandora/object/uuid%3A6e3ce742-a974-491d-97c2-1cafc090b3d9 The gain. This module implements monocular vision height estimation and uses this estimate to stabilize a quadrotor using only a downwards facing camera and an IMU. MicoAssitant software can used for configure protocol or other parameter of MTF-01. Step1 : Connect the MTF-01 to PC by using the USB to TTL module.