Difference between revisions of "ROS topics"

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   <nowiki>$ rosrun turtlesim turtle_teleop_key</nowiki>
 
   <nowiki>$ rosrun turtlesim turtle_teleop_key</nowiki>
  
Using rqt graph you can see which topic is making the communication between the nodes, for this you should command  
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Using rqt graph you can see which topic is making the communication between the nodes, for this you should command  
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   <nowiki>$ rosrun rqt_graph rqt_graph</nowiki>
 
   <nowiki>$ rosrun rqt_graph rqt_graph</nowiki>

Latest revision as of 19:08, 19 October 2014

Your turtle simulation node runs with the turtle as static. If you want to move your turtle using the keyboard, you need to have a node that will execute the operation of keyboard. There is a node in the system named turtle_teleop_key. Now you need to make this node communicate with the turtle_sim node as you expect to move the turtle with keystrokes. This communication is done over topic. Turtle_teleop_key node publishes messages to a topic which is subscribed by turtle_sim node. You need to use rosrun command to make the node communication

 $ rosrun turtlesim turtle_teleop_key


Using rqt graph you can see which topic is making the communication between the nodes, for this you should command


 $ rosrun rqt_graph rqt_graph