jrieffel's profile - activity

I believe I'm sending topic data over a foreign relay, but nothing comes out on the foreign machine

On machine1:

rostopic pub -r 10 /foo /std_msgs/String hello

rosrun foreign_relay foreign_relay adv http://machine2:11311 /machine1/foo /foo

rostopic echo /foo shows a parade of hellos, as you'd expect

on machine 2:

rostopic list shows /machine1/foo

rostopic info /machine1/foo shows * /foo_foreign_relay_0_adv_1306438093482799609 ( http://machine1:54200/ )

but rostopic echo /machine1/foo is empty

roswtf on machine2 reports:

ERROR Could not contact the following nodes: * /foo_foreign_relay_0_adv_1306439078454201491

ERROR The following nodes should be connected but aren't: * /foo_foreign_relay_0_adv_1306439078454201491->/rostopic_16013_1306439118679 (/machine1/foo)

suggestions on debugging?

thanks.

If I understand how ROS topics work, then communication between two robots running ROS via topics should be relatively straightforward. Am I correct, and if so can you point me to a helpful resource on the matter?

attempting to install either gscam or usb_cam results in errors involving boost:

Any advice?

bash-3.2$ rosmake gscam

(after some success...:)

[ rosmake ] All 24 linesluginlib: 3.0 sec ] [ roscpp: 0.7 sec ]
[ 2 Active 19/33 Complete ] {------------------------------------------------------------------------------- mkdir -p bin cd build && cmake -Wdev -DCMAKE_TOOLCHAIN_FILE=rospack find rosbuild/rostoolchain.cmake ..
[rosbuild] Building package pluginlib [rosbuild] Including /Users/rieffelj/ros/ros_comm/clients/roslisp/cmake/roslisp.cmake [rosbuild] Including /Users/rieffelj/ros/ros_comm/clients/rospy/cmake/rospy.cmake [rosbuild] Including /Users/rieffelj/ros/ros_comm/clients/cpp/roscpp/cmake/roscpp.cmake -- Configuring done -- Generating done CMake Warning: The variable, 'CMAKE_TOOLCHAIN_FILE', specified manually, was not used during the generation. -- Build files have been written to: /Users/rieffelj/ros/common/pluginlib/build cd build && make -l8 [ 0%] Built target rospack_genmsg_libexe [ 0%] Built target rosbuild_precompile [ 3%] Building CXX object CMakeFiles/boost_fs_wrapper.dir/src/boost_fs_wrapper.o /Users/rieffelj/ros/common/pluginlib/src/boost_fs_wrapper.cpp: In function 'std::string pluginlib::getPackageFromLibraryPath(const std::string&)':
/Users/rieffelj/ros/common/pluginlib/src/boost_fs_wrapper.cpp:58: error: conversion from 'boost::filesystem3::path' to non-scalar type 'std::basic_string<char, std::char_traits<char="">, std::allocator<char> >' requested
/opt/local/include/boost/system/error_code.hpp: At global scope:
/opt/local/include/boost/system/error_code.hpp:214: warning: 'boost::system::posix_category' defined but not used
/opt/local/include/boost/system/error_code.hpp:215: warning: 'boost::system::errno_ecat' defined but not used
/opt/local/include/boost/system/error_code.hpp:216: warning: 'boost::system::native_ecat' defined but not used make[3]: * [CMakeFiles/boost_fs_wrapper.dir/src/boost_fs_wrapper.o] Error 1 make[2]: [CMakeFiles/boost_fs_wrapper.dir/all] Error 2 make[1]: ** [all] Error 2 -------------------------------------------------------------------------------} [ rosmake ] Output from build of package pluginlib written to: [ rosmake ]
/Users/rieffelj/.ros/rosmake/rosmake_output-20110415-221135/pluginlib/build_output.log [rosmake-7] Finished <<< pluginlib [FAIL] [ 2.98 seconds ]
[ rosmake ] Halting due to failure in package pluginlib. [ rosmake ] Waiting for other threads to complete. [rosmake-2] Finished <<< roscpp [PASS] [ 4.73 seconds ]
[ rosmake ] Results:
[ rosmake ] Built 21 packages with 1 failures.
[ rosmake ] Summary output to directory
[ rosmake ] /Users/rieffelj/.ros/rosmake/rosmake_output-20110415-221135

when I have the line

"from PIL import Image"

in a node, I get the following error when running my node via rosrun

"ImportError: No module named PIL"

of course, PIL is installed in

/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/PIL

but is not an ROS library. How can I change my manifest.xml to find PIL? If I understand correctly, rosrun clobbers my existing PYTHONPATH (when running python I can import PIL just fine).

By default, ar_pose package looks for Image data published by usb_cam, but I would like it to look for Image data published by a different node (ar_drone). Is there a way to change the topic source without hacking the source code for ar_pose?

I notice that ar_kinect must do something similar.

Fresh install of diamondback and Lucid in VirtualBox on my mac, I installed usb_cam (bosch-drivers), but get the following error when running:

VIDIOC_STREAMON error 28, No space left on device

I get a similar error when I try to run guvcview.

Any advice on resolving this issue? Is it a virtual machine problem?