mavros package for ROS Noetic
check out into a catkin_ws
catkin_make install
flight controller connected on usb /dev/ttyACM0
. ~/catkin_ws/install/setup.bash
roslaunch offboard offboard.launch
flight controller over UDP
. ~/catkin_ws/install/setup.bash
roslaunch offboard offboard.launch fcu_url:=udp://192.168.1.200:14550?ids=255,240@