This repo is built on top of tello_ros
For the installation of tello_ros, check the original repo.

There are 4 ROS packages:

• tello_driver is a C++ ROS node that connects to the drone
• tello_msgs is a set of ROS messages
• tello_description contains robot description (URDF) files
• tello_gazebo can be used to simulate a Tello drone in Gazebo,
• tello_action can be used to control a Tello drone based on distance. Contribution of this Repo
• tello_interfaces support messages based on distance. Contribution of this Repo

tello_ros is devloped with tello SDK 1.3
Therefore, distance based control is not possible.
I have developed distance based service call.

ros2 service call /tello_action tello_msgs/TelloAction "{cmd: 'takeoff'}"
ros2 service call /drone1/move_cmd tello_interfaces/srv/HexaCmd "{dir: x, dist: 5}"
ros2 service call /tello_action tello_msgs/TelloAction "{cmd: 'land'}"
dir should be among x, y, z, xy. (xy means z axis rotation), the unit of dist is m or radian.

source {tello_ros_ws}/install/setup.bash ros2 launch tello_gazebo simple_launch.py ./demo/hexa_drone_rc.bash