Steps to start the launch file of crazyflie 2.0. Start with the script that will launch Gazebo. The launch file maybe crazyflie_sim.launch .
$ cd '/home/shetty/catkin_ws/src/crazyflie_ros/crazyflie_2.0/crazyflie_gazebo/launch'
$ ls
$ roslaunch crazyflie_sim.launch
Next, open the script containing python programs for various tasks:
$ cd '/catkin_ws/src/crazyflie_ros/crazyflie_2.0/crazyflie_gazebo/scripts'
$ ./run_cfs.sh
After running the above script, gyrobias found must be printed on the screen.
Then,run the python programs for several tasks such as testing the vertical trajectory, helix trajectory, waypoint navigation,etc.
$ cd '/catkin_ws/src/crazyflie_ros/crazyflie_2.0/crazyflie_gazebo/scripts'
$ ls
$ python vertical_trajectory.py