rrbot : Controller Spawner couldn‘t find the expected controller_manager ROS interface

运行
roslaunch rrbot_gazebo rrbot_world.launch

出现错误
Gazebo [Err] [REST.cc:205] Error in REST request
解决
sudo gedit ~/.ignition/fuel/config.yaml

然后将 url : https://api.ignitionfuel.org 用 # 注释掉
添加 url: https://api.ignitionrobotics.org

错误解决

运行
roslaunch rrbot_control rrbot_control.launch
出现错误
[WARN] [1705567406.356631, 1139.737000]: Controller Spawner couldn’t find the expected controller_manager ROS interface.

解决方法，重新安装
sudo apt install ros-melodic-gazebo-*

重新运行
roslaunch rrbot_gazebo rrbot_world.launch
roslaunch rrbot_control rrbot_control.launch
问题解决

运行
rosrun rrbot_control topic_publisher.py
提示错误
ModuleNotFoundError: No module named ‘rospkg’

解决方法
将 文件topic_publisher.py 中
#!/usr/bin/env python3
改为
#!/usr/bin/env python
问题解决

参考资料：

解决[WARN] : Controller Spawner couldn‘t find the expected controller_manager ROS interface.思路@TOC

关于Gazebo [Err] [REST.cc:205] Error in REST request 问题的解决