$ export TURTLEBOT3_MODEL=${TB3_MODEL}
$ ros2 run turtlebot3_teleop teleop_keyboard
2. 如果 node 節點成功執行，則 terminal 視窗將顯示以下指示。
Control Your TurtleBot3!
---------------------------
Moving around:
w
a s d
x
w/x : increase/decrease linear velocity (Burger : ~ 0.22, Waffle and Waffle Pi : ~ 0.26)
a/d : increase/decrease angular velocity (Burger : ~ 2.84, Waffle and Waffle Pi : ~ 1.82)
space key, s : force stop
CTRL-C to quit
