yongqi's profile - activity

I am using Indigo and Turtlebot. The robot has a map and it can go anywhere after I send command. I want it be suspended after after I send a command. Is there a method to suspend ROS or Turtlebot? Thanks.

Thanks a lot

Thanks for your reply. I am using python and Turtlebot. The Subscriber:rospy.Subscriber('/moblie_base/sensors/core', SensorState, self.pick_up), Publisher:self.vol_pub = rospy.Publisher('volice', String, queue_size=1) Publisher will publish topic in pick_up, can I set the Subscriber interval?

Or how can I set the Publisher interval?

After I create a Subscriber, it will give me message all the time. But I do not want the Subscriber listens all the time, how to set the Subscriber interval? Thanks

no,it did not build, when I enter rosrun + the package name, it can not find this package. Or after I enter two TAB, it did return the package name.

I have installed indigo followed link text successfully in ubuntu 14.04. But when I create a new package, I can not build it using catkin_make, it only returns

thinker@thinker:~/turtlebot$ catkin_make
Base path: /home/thinker/turtlebot
Source space: /home/thinker/turtlebot/src
Build space: /home/thinker/turtlebot/build
Devel space: /home/thinker/turtlebot/devel
Install space: /home/thinker/turtlebot/install
####
#### Running command: "make cmake_check_build_system" in "/home/thinker/turtlebot/build"
####
####
#### Running command: "make -j4 -l4" in "/home/thinker/turtlebot/build"
####

here is the ROS_PACKAGE_PATH: /home/thinker/turtlebot/src:/home/thinker/catkin_ws/src:/home/thinker/huilong/src:/opt/ros/indigo/share:/opt/ros/indigo/stacks what can I do next? thanks

Thanks a lot

no, I don't have this package. But I have it in my robot computer, I want to add the displays manually on my desktop computer while don't use ssh. Can this be achieved? If not, I don't know what is the HOST_MASTER_URI used for(I have set it http://thinker.local:11311 ). Thanks very much.

thanks, it works.I have another question.When I control the robot through desktop computer without ssh like thiszyq@zyq:~$ rosrun rviz rviz -drospack find rbx1_nav/sim.rviz, it told me [rospack] Error: package 'rbx1_nav' not found. But I have set the HOSTNAME and URI, what should I do thanks

hi, I am using indigo in ubuntu14.04.2. I am trying to connect my desktop computer(zyq.local) and another computer(thinker.local). I can ping them from each one, and I have set the hostname and host_master_uri like this: in my desktop computer:

export ROS_HOSTNAME=zyq.local
export ROS_MASTER_URI=http://thinker.local:11311

in another:

export ROS_HOSTNAME=thinker.local

then I login the robot computer through ssh

ssh thinker.local -l think
roscore &
roslaunch rbx1_bringup fake_pi_robot.launch

after this I open another terminal in my desktop computer an connect robot computer again

ssh thinker.local -l think
rosrun rviz rviz -d `rospack find rbx1_nav`/sim.rviz

now error occurs:rviz: cannot connect to X server I do not why, two computers can ping each other. Thanks.

I am using indigo in ubuntu. I installed ROS OpenNI driver like this:

sudo apt-get install ros-indigo-openni-cammer

after this I entered roslaunch rbx1_vision openni_node.launch and got error:

[openni_node.launch] is neither a launch file in package [rbx1_vision] nor is [rbx1_vision] a launch file name
The traceback for the exception was written to the log file

I got the same error after I run roscore, I don't know why. Thanks.

I am using indigo in Ubuntu 14.04.2. I try to install a web camera driver like this:

cd ~/catkin_ws
https://github.com/ericperko/uvc_cam
rosmake uvc_cam

errors occur no matter whether I enter the uvc_cam folder or not:

[ rosmake ] WARNING: The following args could not be parsed as stacks or packages: ['uvc_cam']
[ rosmake ] ERROR: No arguments could be parsed into valid package or stack names.

thanks.