Hi there,
I found a small issue with the text of the mini project. It states to use the following code to see a demo.
roslaunch turtlebot3_teleop keyboard_teleop.launch
If you execute that it will complain as it can’t find a launch file named that way. Instead, the command should display the following command.
roslaunch turtlebot3_teleop turtlebot3_teleop_key.launch