NO cmd_vel on rqt graph
i want to navigate P3AT robot spawned in usarsim through teleop_twist_keyboard package (in ROS).
I have connected ros to usarsim using executive_usarsim package and spawned the P3AT robot in usarsim, but when i run teleop_twist_keyboard and presses keys to move the robot, nothing happens. please help me out.
I have tried to run $rosrun rqt_graph rqt_graph, the following rqt graph appears: Click to view rqt_graph
then i have run $ rostopic echo /executive_usarsim/status, following graph appeared: Click to view graph
then i observed the cmd_vel is not present. what to do next. please help.
NOTE: i am using ROS-fuerte on UBUNTU 12.04 LTS. [with USARSim simulator] see full description: click here
cmd_vel is not published so its not on rqt_graph. try
rostopic info cmd_velto see topic publishers and subcribershello, @bvbdort . from rostopic info cmd_vel.
since no one is subscriber. i want executive_usarsim to be a subscriber.
here is the rqt graph obtained. https://tucrlab.files.wordpress.com/2...
Are you sure that executive_usarsim is subscribing to cmd_vel topic? You may wanna view "All Nodes and Topics" in rqt_graph (Upper left drop down menu) or check it using
rostopic list. Also, check your launch file if you are usingremapto change topic names.i am using usarsim_inf & it works fine.