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2016-01-11 11:01:28 -0500 | commented answer | rosserial_xbee Unable to sync with device Hello K1B3, I am facing exact same problem and I am using same ROS version and Ubantu as you. Here is the problem I reported. http://answers.ros.org/question/22303.. . Please help me understand what you did to solve this issue. Appreciate it.
Thanks. |
2016-01-11 11:00:42 -0500 | commented question | rosserial_xbee Unable to sync with device Hello K1B3,
I am facing exact same problem and I am using same ROS version and Ubantu as you. Here is the problem I reported.
http://answers.ros.org/question/22303...
Please help me understand what you did to solve this issue.
Appreciate it. Thanks. |
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2016-01-10 10:02:18 -0500 | commented question | ROS Serial Xbee - Unable to sync with device Yes we can transmit and receive data. Verified using XCTU. Also when I start xbee_network.py from the machine where coordinator is connected, we see that it send some frame data to node Xbee. But we do not get any response from NodeXB back . Could it be something to do with baud rate ? |
2016-01-03 17:16:46 -0500 | commented question | robot_upstart not finding install_script Any one have more insight into this problem. Really appreciate your help. |
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2016-01-01 17:03:40 -0500 | answered a question | ROS Serial Xbee - Unable to sync with device Wondering if any one have seen this error and know little bit more about this. |
2015-12-26 18:45:16 -0500 | asked a question | robot_upstart not finding install_script I need to start ros launch file at machine startup . We are using Ubilinux on Intel/Edison. We are using ROS: - /rosdistro: indigo
- /rosversion: 1.11.13
I am trying to follow these instructions http://docs.ros.org/api/robot_upstart...
I have downloaded code from https://github.com/clearpathrobotics/...
branch indigo-devel Here is how my folder looks hemant@127:~/catkin_ws/src/robot_upstart/src/robot_upstart$ ls -ltr
total 36
-rw-rw-r-- 1 hemant hemant 2408 Dec 26 16:06 uninstall_script.py
-rw-rw-r-- 1 hemant hemant 6667 Dec 26 16:06 providers.py
-rw-rw-r-- 1 hemant hemant 9173 Dec 26 16:06 job.py
-rw-rw-r-- 1 hemant hemant 4814 Dec 26 16:06 install_script.py
-rw-rw-r-- 1 hemant hemant 1663 Dec 26 16:06 __init__.py
Following shows command I ran. hemant@127:~/catkin_ws$ catkin_make
hemant@127:~/catkin_ws$ catkin_make install
hemant@127:~/catkin_ws$ source ~/catkin_ws/devel/setup.bash
Now creating a job hemant@127:~/catkin_ws$ rosrun robot_upstart install myrobot mybotpackage/test.launch
Traceback (most recent call last):
File "/home/hemant/catkin_ws/src/robot_upstart/scripts/install", line 29, in <module>
from robot_upstart.install_script import main
ImportError: No module named robot_upstart.install_script
Question : Why it is not able to find robot_upstart.install_script ? Thanks,
Hemant |
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2015-12-23 17:06:12 -0500 | asked a question | ROS Serial Xbee - Unable to sync with device I see this error when I run my coordinator xbee USB to connect to device Xbee. Contacting Xbees : [ERROR] [WallTime: 1450911586.913302] Unable to sync with device; possible link problem or link software version mismatch such as hydro rosserial_python with groovy Arduino
It used to work one day earlier and we have not changed any software version/code This is how I am trying to connect ~/catkin_ws$ rosrun rosserial_xbee xbee_network.py /dev/ttyUSB6 3
/dev/ttyUSB6 : This is where coordinator with address 0 is pluged in. I did check in XCTU that it has same Channel, PAN id and baud rate 57600 I did try to change usb cables, but did not help
We are using sparkfun explorer
I am using Xbee S1. |
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2015-11-05 17:54:02 -0500 | answered a question | reading parameter in c Based on suggestion above following code works. and I also set parameter at command line _my_number:=5 ros::NodeHandle nh_param("~");
int my_number;
nh_param.param("my_number", my_number ,int(0));
Thanks,
Hemant |
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2015-11-04 01:42:31 -0500 | asked a question | reading parameter in c Hello,
I am trying to read parameters in my program based on this example http://wiki.ros.org/Parameter%20Server Here is code snippet std::string my_number;
nh_.getParam("my_number",my_number);
ROS_INFO("\n My Number %s",my_number.c_str());
And I am calling like this
rosrun mypkg my_node my_number:=5 This value is not getting read. Please help, how can I read in my C program. Thanks,
Hemant |
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2015-10-20 23:08:49 -0500 | asked a question | Not able to find rosbridge_server Hello,
I am new to use zbar_ros package. I can use zbarcam independently and read QR code using this command zbarcam --raw /dev/video1 . I am on ros indigo and ubantu 14.04 Now I am trying to use zbar_ros to read QR code from by webcam at /dev/video1 . My goal is to read the qr code and save in local file or database. Here is the launch file, I am sure I am missing something here. Please advise. sudo vi /opt/ros/indigo/share/zbar_ros/launch/sample-roszbar.launch
<?xml version="1.0"?>
<launch>
<node pkg="nodelet" type="nodelet" name="zbar_manager" args="manager"/>
<!-- Example camera launch -->
<node pkg="nodelet" type="nodelet" name="uvc_camera" output="screen" args="load uvc_camera/CameraNodelet zbar_manager">
<param name="device" type="string" value="/dev/video1"/>
</node>
<!--<node pkg="nodelet" type="nodelet" name="barcode_reader" args="load zbar_ros/barcode_reader_nodelet zbar_manager">-->
<!--<param name="throttle_repeated_barcodes" type="double" value="2.0"/>-->
<!--</node>-->
<node pkg="zbar_ros" type="barcode_reader_node" name="barcode_reader">
<param name="throttle_repeated_barcodes" type="double" value="2.0"/>
</node>
</launch>
Here is how I am launching it. roslaunch zbar_ros sample-roszbar.launch
Here is the error I get started roslaunch server http://192.168.1.149:47556/
SUMMARY
========
PARAMETERS
* /barcode_reader/throttle_repeated_barcodes: 2.0
* /rosdistro: indigo
* /rosversion: 1.11.13
* /uvc_camera/device: /dev/video1
NODES
/
barcode_reader (zbar_ros/barcode_reader_node)
uvc_camera (nodelet/nodelet)
zbar_manager (nodelet/nodelet)
ROS_MASTER_URI=http://localhost:11311
core service [/rosout] found
process[zbar_manager-1]: started with pid [5653]
process[uvc_camera-2]: started with pid [5654]
[ INFO] [1445397784.366668437]: Loading nodelet /uvc_camera of type uvc_camera/CameraNodelet to manager zbar_manager with the following remappings:
process[barcode_reader-3]: started with pid [5687]
[ERROR] [1445397784.416193993]: Failed to load nodelet [/uvc_camera] of type [uvc_camera/CameraNodelet] even after refreshing the cache: **According to the loaded plugin descriptions the class uvc_camera/CameraNodelet with base class type nodelet::Nodelet does not exist**. Declared types are depth_image_proc/convert_metric depth_image_proc/disparity depth_image_proc/point_cloud_xyz depth_image_proc/point_cloud_xyz_radial depth_image_proc/point_cloud_xyzi depth_image_proc/point_cloud_xyzi_radial depth_image_proc/point_cloud_xyzrgb depth_image_proc/register image_proc/crop_decimate image_proc/debayer image_proc/rectify image_rotate/image_rotate image_view/disparity image_view/image nodelet_tutorial_math/Plus pcl/BAGReader pcl/BoundaryEstimation pcl/ConvexHull2D pcl/CropBox pcl/EuclideanClusterExtraction pcl/ExtractIndices pcl/ExtractPolygonalPrismData pcl/FPFHEstimation pcl/FPFHEstimationOMP pcl/MomentInvariantsEstimation pcl/MovingLeastSquares pcl/NodeletDEMUX pcl/NodeletMUX pcl/NormalEstimation pcl/NormalEstimationOMP pcl/NormalEstimationTBB pcl/PCDReader pcl/PCDWriter pcl/PFHEstimation pcl/PassThrough pcl/PointCloudConcatenateDataSynchronizer pcl/PointCloudConcatenateFieldsSynchronizer pcl/PrincipalCurvaturesEstimation pcl/ProjectInliers pcl/RadiusOutlierRemoval pcl/SACSegmentation pcl/SACSegmentationFromNormals pcl/SHOTEstimation pcl/SHOTEstimationOMP pcl/SegmentDifferences pcl/StatisticalOutlierRemoval pcl/VFHEstimation pcl/VoxelGrid pointcloud_to_laserscan/pointcloud_to_laserscan_nodelet stereo_image_proc/disparity stereo_image_proc/point_cloud2 zbar_ros/barcode_reader_nodelet
[ERROR] [1445397784.416298624]: The error before refreshing the cache was: According to the loaded plugin descriptions the class uvc_camera/CameraNodelet with base class type nodelet::Nodelet does not exist. Declared types are depth_image_proc/convert_metric depth_image_proc/disparity depth_image_proc/point_cloud_xyz depth_image_proc/point_cloud_xyz_radial depth_image_proc/point_cloud_xyzi depth_image_proc/point_cloud_xyzi_radial depth_image_proc/point_cloud_xyzrgb depth_image_proc/register image_proc/crop_decimate image_proc/debayer image_proc/rectify image_rotate/image_rotate image_view/disparity image_view/image nodelet_tutorial_math/Plus pcl/BAGReader pcl/BoundaryEstimation pcl/ConvexHull2D pcl/CropBox pcl/EuclideanClusterExtraction pcl/ExtractIndices pcl/ExtractPolygonalPrismData pcl/FPFHEstimation pcl/FPFHEstimationOMP pcl/MomentInvariantsEstimation pcl/MovingLeastSquares pcl/NodeletDEMUX pcl/NodeletMUX pcl/NormalEstimation pcl/NormalEstimationOMP pcl/NormalEstimationTBB ... (more) |
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2015-10-17 12:34:44 -0500 | asked a question | zbar_ros how to install Hello,
My goal is to read qr code from video camera stream.
I am first time trying to install zbar_ros.
I am looking for tutorial to configure and install zbar_ros on Ubantu 14.04 . I did look at http://wiki.ros.org/zbar_ros but there wasn't enough instructions to install. Please point me to instructions if they are available somewhere. I have also read that this package can read video stream directly. So we do not need to install openCV.
Thanks,
Hemant |