ros2 launch crazyflie launch.py backend:=sim error

[Guohao23]

HI! I followed the instructions mentioned on your website for crazyswarm2, not able to perform software in loop simulation. I am getting an error while running the command "ros2 launch crazyflie launch.py backend:=sim". ubuntu:20.04 galactic

guo@Guo:~/crazyswarm2/ros2_ws$ros2 launch crazyflie launch.py backend:=sim
/opt/ros/galactic/bin/ros2:6: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
  from pkg_resources import load_entry_point
[INFO] [launch]: All log files can be found below /home/guo/.ros/log/2024-04-24-08-25-11-284052-Guo-6165
[INFO] [launch]: Default logging verbosity is set to INFO
[WARNING] [launch_ros.actions.node]: Parameter file path is not a file: teleop.yaml
[INFO] [crazyflie_server-3]: process started with pid [6171]
[INFO] [teleop-1]: process started with pid [6167]
[INFO] [joy_node-2]: process started with pid [6169]
[INFO] [gui.py-4]: process started with pid [6173]
[teleop-1] terminate called after throwing an instance of 'rclcpp::ParameterTypeException'
[teleop-1]   what():  expected [double] got [not set]
[ERROR] [teleop-1]: process has died [pid 6167, exit code -6, cmd '/home/guo/crazyswarm2/ros2_ws/install/crazyflie/lib/crazyflie/teleop --ros-args -r __node:=teleop -r emergency:=all/emergency -r takeoff:=all/takeoff -r land:=all/land'].
[crazyflie_server-3] Traceback (most recent call last):
[crazyflie_server-3]   File "/home/guo/crazyswarm2/ros2_ws/install/crazyflie_sim/lib/crazyflie_sim/crazyflie_server", line 33, in <module>
[crazyflie_server-3]     sys.exit(load_entry_point('crazyflie-sim==2.0.0', 'console_scripts', 'crazyflie_server')())
[crazyflie_server-3]   File "/home/guo/crazyswarm2/ros2_ws/install/crazyflie_sim/lib/crazyflie_sim/crazyflie_server", line 25, in importlib_load_entry_point
[crazyflie_server-3]     return next(matches).load()
[crazyflie_server-3]   File "/usr/lib/python3.8/importlib/metadata.py", line 77, in load
[crazyflie_server-3]     module = import_module(match.group('module'))
[crazyflie_server-3]   File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
[crazyflie_server-3]     return _bootstrap._gcd_import(name[level:], package, level)
[crazyflie_server-3]   File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
[crazyflie_server-3]   File "<frozen importlib._bootstrap>", line 991, in _find_and_load
[crazyflie_server-3]   File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
[crazyflie_server-3]   File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
[crazyflie_server-3]   File "<frozen importlib._bootstrap_external>", line 848, in exec_module
[crazyflie_server-3]   File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
[crazyflie_server-3]   File "/home/guo/crazyswarm2/ros2_ws/install/crazyflie_sim/lib/python3.8/site-packages/crazyflie_sim/crazyflie_server.py", line 26, in <module>
[crazyflie_server-3]     from .crazyflie_sil import CrazyflieSIL, TrajectoryPolynomialPiece
[crazyflie_server-3]   File "/home/guo/crazyswarm2/ros2_ws/install/crazyflie_sim/lib/python3.8/site-packages/crazyflie_sim/crazyflie_sil.py", line 10, in <module>
[crazyflie_server-3]     import cffirmware as firm
[crazyflie_server-3]   File "<frozen zipimport>", line 259, in load_module
[crazyflie_server-3]   File "/home/guo/.local/lib/python3.8/site-packages/cffirmware-0.1-py3.8.egg/cffirmware.py", line 15, in <module>
[crazyflie_server-3] ModuleNotFoundError: No module named '_cffirmware'
[ERROR] [crazyflie_server-3]: process has died [pid 6171, exit code 1, cmd '/home/guo/crazyswarm2/ros2_ws/install/crazyflie_sim/lib/crazyflie_sim/crazyflie_server --ros-args -r __node:=crazyflie_server --params-file tmp_server.yaml'].
[gui.py-4] Traceback (most recent call last):
[gui.py-4]   File "/home/guo/crazyswarm2/ros2_ws/install/crazyflie/lib/crazyflie/gui.py", line 22, in <module>
[gui.py-4]     from nicegui import Client, app, events, ui, ui_run, Tailwind
[gui.py-4] ModuleNotFoundError: No module named 'nicegui'
[ERROR] [gui.py-4]: process has died [pid 6173, exit code 1, cmd '/home/guo/crazyswarm2/ros2_ws/install/crazyflie/lib/crazyflie/gui.py --ros-args -r __node:=gui -r __ns:=/ --params-file /tmp/launch_params_tv2wfp5y'].

[knmcguire]

There are two issues here:
1- [crazyflie_server-3] ModuleNotFoundError: No module named '_cffirmware'
2- [gui.py-4] ModuleNotFoundError: No module named 'nicegui'

To fix 1- you'll need to go back to the installation step 7 and do that again (see instructions). It is not able to find the python bindings in the same path
To fix 2- That is missing documentation error on our side. we'll add it to the documentation. You can fix this by installing the right module pip3 install nicegui