Wilianson's profile - activity

It helps me to to publish a std_msgs/Int32, I was a little lost with this work. Thank you :D

Hi, I have Edited my question with the error message.

Hi, I am developing a web application with RosBridge for robot teleoperation, and I need to get all the sensor information, but my robot has topics with "Non Official " Messages , and when I wrote a subscriber it does not work, I suppose I have to make an extra work to get these information at my web browser, but I don't know how to start.

The error in the server is the next.

[ERROR] [WallTime: 1471449004.457651] [Client 0] [id: subscribe:/komodo_1/status:7] subscribe: Unable to import msg class status from package ric_robot. Caused by 'module' object has no attribute 'status'

Where:

/komodo_1/status is the topic with the 'custom message'

And the message type is 'ric_robot/ric_status' which has a status atribute.

If my english was not clear I am asking for a similiar tutorial of this, but for JavaScript with RosBridge.

I am working with ROS Hydro in Ubuntu 13.04

Thanks in advance for your answers.

Hi, I had a similar problem, maybe this answer can be useful for you this link

HI, I am trying to work with Image Topics in Rosjava, I have done a Subscriber to the Image topic, but I have some problems:

• I need to know about the internal structure in the ChannelBuffer Object that represents data in Image Topic and ImageCompresed topic .
• Also I need to send this image over sockets to an Android Device and show it as an Image, I was trying to serialize the Channel Buffer Object, but I failed

thanks, I will work with rosbridge

Hi, I am doing a teleoperation application in Android , and it is going to be finished soon, but the next step in my project is moving it into a web application. I was thinking in a JavaScript client but I don't find enough information to make it.

Another option was make a web java development and using my current code and move it into a web.

I would know your suggestions to start my project, I am working with a Hydro distribution of ROS.

Thanks in advance

Hi, I am working on RosJava Application to get information from sensors through a Listener Project, on Ubuntu 13.04 and Ros Hydro.

My problem is I have completed this tutorial, and the message generator artifact has generated a .jar file with the clases of my personalized messages, but I dont know How can I include this file or the message project (on the last step in the tutorial) on my Listener Project.

Please Help me

Done! Thanks :D

In matlab they have this way to convert 8 bit numbers which are in an array (data) into float 32: x = typecast(uint8([data(1),data(2),data(3),data(4)]), 'single')

Thank you so much for your answer, this answer made me think about my interpretation and that was wrong, now I have this new Z matrix, and I already great. Thanks :D

Original Image

Z Matriz

Hi, I finally break my restrictions and I realized that the PointField's elements are constant: and they are

• *element 0 * INT8: 1 UINT8: 2 INT16: 3 UINT16: 4 INT32: 5 UINT32: 6 FLOAT32: 7 FLOAT64: 8 name: x offset: 0 datatype: 7 count: 1 **element 1 INT8: 1 UINT8: 2 INT16: 3 UINT16: 4 INT32: 5 UINT32: 6 FLOAT32: 7 FLOAT64: 8 name: y offset: 4 datatype: 7 count: 1 **element 2 ** INT8: 1 UINT8: 2 INT16: 3 UINT16: 4 INT32: 5 UINT32: 6 FLOAT32: 7 FLOAT64: 8 name: z offset: 8 datatype: 7 count: 1

Hi, I am working in a application to have the output of my AsusXTion depth sensor, I need to have the XYZ coordinates, to make a representation, but my restrictions are that I can't use the PCL conversion which is in ROS.

I am using a file to output the pointCloud and I have all the others features in my PointCloud2 message such as: height, width, is_bigendian, point_step, row_step, data, is_dense.

But when I am going to have the PointField I can't have because I am using a Java code (without Rosjava) to catch the "rostopic echo " out for the AsusCamera/depth/point topic and because PointField is not a native datatype for java I can't use this datatype to get the atributes for PointCloud. This way to get the output for my depth sensor is another restriction in my program (because restrictions at robot's stack )

My question is if this PointField is always constant or change according the readings for the sensor?. If it is a constant anybody has this outputs for my Asus Xtion depth sensor. Because I have the 16 fields for each pixel, but I don't know how to interpret, I have a litle idea that is a X Y Z, RGBA configuration, and each XYZ has 32 bits and I have to pick each 4 elements for the 16 fields, and the last are RGBA.

Thanks in advance for your answers

Hello, I am using ROS hybrid at ubuntu 12.04, and I am following tutorial to install komodo at ROS which is at the documentation of ROS, Firstly I localized at roscd and clone the respositories of github.

percy@percy-Compaq-Presario-CQ60-Notebook-PC:/opt/ros/hydro$ roscd percy@percy-Compaq-Presario-CQ60-Notebook-PC:/opt/ros/hydro$ git clone git://github.com/robotican/komodo.git

but when I do rosmake, I have this error. percy@percy-Compaq-Presario-CQ60-Notebook-PC:/opt/ros/hydro$ rosmake komodo[ rosmake ] rosmake starting...
[ rosmake ] Packages requested are: ['komodo']
[ rosmake ] Logging to directory /home/percy/.ros/rosmake/rosmake_output-20140528-180550 [ rosmake ] Expanded args ['komodo'] to: []
[ rosmake ] WARNING: The following args could not be parsed as stacks or packages: ['komodo'] [ rosmake ] ERROR: No arguments could be parsed into valid package or stack names.

I actually put first these lines, but the error is continue.

percy@percy-Compaq-Presario-CQ60-Notebook-PC:/opt/ros/hydro$ export ROS_PACKAGE_PATH=/home/percy/catkin_ws/:/opt/ros/hydro/stacks percy@percy-Compaq-Presario-CQ60-Notebook-PC:/opt/ros/hydro$ source /opt/ros/hydro/setup.bash

thanks in advance for your responses