hello_world script doesnt get past waiting for crazyswarm service

[seitzseb]

Hello whoenig,
i am having trouble starting the hello_world script, where, when starting it, nothing happens. when i Ctrl+C it, it appears to be struggling at the following Part of the Code:

^CTraceback (most recent call last):
  File "/home/sebastian/ros2_ws/install/crazyswarm2_examples/lib/crazyswarm2_examples/hello_world", line 33, in <module>
    sys.exit(load_entry_point('crazyswarm2-examples', 'console_scripts', 'hello_world')())
  File "/home/sebastian/ros2_ws/build/crazyswarm2_examples/crazyswarm2_examples/hello_world.py", line 13, in main
    swarm = Crazyswarm()
  File "/home/sebastian/ros2_ws/build/py_crazyswarm2/py_crazyswarm2/crazyswarm_py.py", line 58, in __init__
    self.allcfs = CrazyflieServer(crazyflies_yaml)
  File "/home/sebastian/ros2_ws/build/py_crazyswarm2/py_crazyswarm2/crazyflie.py", line 670, in __init__
    self.emergencyService.wait_for_service()
  File "/opt/ros/galactic/lib/python3.8/site-packages/rclpy/client.py", line 161, in wait_for_service
    time.sleep(sleep_time)
KeyboardInterrupt

do you have any suggestion what could fix this problem?

[whoenig]

This usually means that crazyswarm-server is not running. Did you roslaunch crazyswarm hover_swarm.launch?

[seitzseb]

i just tried it and bash doesnt find the command roslaunch. do i have to setup the roslaunch command ?

[whoenig]

Sorry, this is ROS2, so you need ros2 launch crazyswarm2 launch.py.

[seitzseb]

thank you!