I'm new in ROS i installed gazebo and rviz then i installed turtlebot3. IThen i run these commands:
roslaunch turtlebot3_gazebo turtlebot3_world.launch
roslaunch turtlebot3_navigation turtlebot3_navigation.launch
Then on the terminal output was like this:
[ WARN] [1697980994.321218869, 4.902000000]: global_costmap: Parameter "plugins" not provided, loading pre-Hydro parameters [ INFO] [1697980994.343047781, 4.923000000]: global_costmap: Using plugin "static_layer" [ INFO] [1697980994.349648280, 4.931000000]: Requesting the map... [ INFO] [1697980994.559158492, 5.133000000]: Resizing static layer to 384 X 384 at 0.050000 m/pix [ INFO] [1697980994.662667899, 5.232000000]: Received a 384 X 384 map at 0.050000 m/pix [ INFO] [1697980994.668890700, 5.238000000]: global_costmap: Using plugin "obstacle_layer" [ INFO] [1697980994.671354596, 5.241000000]: Subscribed to Topics: scan [ INFO] [1697980994.698207561, 5.267000000]: global_costmap: Using plugin "inflation_layer" [ WARN] [1697980994.745432817, 5.315000000]: local_costmap: Parameter "plugins" not provided, loading pre-Hydro parameters