Hi guys, I have tested that the robot can move in a real environment. Tring to move the robot in simulations but not working. First, run the virtual world command

roslaunch turtlebot3gazebo turtlebot3world.launch

then run the tele control command

roslaunch turtlebot3teleop turtlebot3teleop_key.launch

The virtual robot doesn't respond to the tele control.

And I run rqtgraph, there a three node "/gazebo" "/gazebogui" "/turtlebot3teleopkeyboard". And I check the topic "/cmd_vel", no one was subscribing it.

Isn't any connections between these topics. Did I miss any command?