enddl22's profile - activity

Yes, but no success.

Thanks for the comment. Do you know any reference for topic forwarding? I guess you refer to packet forwarding using "iptables". I attempted to forward all packet from PC2 to PC3 by setup iptables rules on PC1. It is possible to send a message using netcat but roscore running on PC3 can't subscirbe.

Hello,

I am trying to share a topic between two different networks.

There are three computers and let's call them as PC1,PC2, and PC3. (all are ubuntu and running ROS)

Each PC has the following network settings.

PC1:

wlan0 (obtaining IP from ISP's DHCP) IP: 121.131.88.99

eth0 IP: 192.168.1.1

PC2: eth0 (Static IP address) IP: 192.168.1.30 Gateway: 192.169.1.1

PC3: wlan0 (obtaining IP from ISP's DHCP) IP: 121.131.88.100

For more explanations, I have two network adaptors named: wlan0 and eth0 on PC1.

wlan0 connects to ISP's network (the Internet is connected) and obtain a IP address through ISP's DHCP. (let's say 121.131.88.99)

eth0 is a gateway that has a static IP address (192.168.1.1) and PC2 is connected to PC1 through wired for the Internet sharing. (It works). iptable is properly set up for forwarding from wlan0 to eth0.

ROS master is running on PC2 which has a IP address (192.168.1.30). This machine publish a simple topic such as "/test/topic" with std_msgs/String type.

What I want is that subscribing the topic "/test/topic" from PC3. I can subscribe the topic on PC2 by setting ROS_MASTER_URI to 192.168.1.30 but PC3 can't connect to PC2 since they are belongs to different networks. (192.169.x.x) and (121.131.x.x).

I already attempted ros multimaster_fkie but still couldn't subscribe anything on PC3.

I think I do need some iptable settings from eth0 to wlan0 on PC1 as it done for the Internet sharing (from wlan0 to to eth0).

Any comments on this issue would be appreciate.

Cheers.

PS: I am bit afraid whether the explanation is understandable or deliver my point or not as my network setting environments is messy.

Hello,

I am trying to check out bullet from kforge with the following command.

hg clone https://kforge.ros.org/geometry/bullet

Then it asks an authorization and spitted out a warning message.

warning: kforge.ros.org certificate with fingerprint (my pc's mac-address) not verified (check hostfingerprints or web.cacerts config setting) http authorization required realm: kforge.ros.org Restricted Area user:

Mercurial version is 2.6.2, python 2.7.2 and running on Mac and the Ubuntu Linux.

Any recommendation would be appreciate.

Hello,

I have a question about topic subscription.

There are 3 nodes named camera_driver,tracker and estimator.

The tracker sends a std_msg/float32 topic message only once to the estimator when it completes its initialization.

The camera_driver keeps publishing image msg.

If I run nodes in order tracker -> estimator -> camera_driver then estimator is able to subscribe the std_msg/float32 type message.

However, when I execute camera_driver->tracker->estimator order, the estimator can't subscribe any topic.

Furthermore, "rostopic echo" can subscribe the message in the latter case.

I am using groovy on 12.04 Ubuntu 64bits.

Is there anyone faced similar symptom?

Cheers.

Dear, ROS people.

I have a question about acceleration ground truth.

We have VICON system which can provide position and angles.

In order to obtain linear acceleration, double differentiation is applied to position data. Computed the acceleration, however, looks very noisy. I also tried to apply median filter but no success. Is there anyone who knows how to get nice acceleration like the linked paper?

http://www.xsens.com/images/stories/PDF/Comparison%20of%20three%20measurement%20systems,%20Vicon%20vs%20Xsens%20vs%20Kionix.pdf

Maybe the possible answer would be "apply low-pass filter with 4th_order Butterworth filter with 6Hz cutoff frequency".

Cheers.

Hello, ROS people.

I am using ROS laser_scan_matcher but faced this ICP failure.

Please have a look the following video.

YouTube video

Is there anyone who encountered this and any recommendations?

Cheers.

Dear, ROS-users.

Recently, I could find this cool footage from CCNY-Robotics.

http://www.youtube.com/watch?feature=player_embedded&v=XrkY1DCNQkQ

I'm just wondering how they could visualize such rainbow color laser scan data w.r.t height data.

Does Rviz support this function by default?

If I have /height /scan /map /odom topics, is it possible to visualize like the above footage?

Any idea would be appreciate.

Cheers.

Hello, I am a beginner to ROS documentation.

I am trying to create ros page which contains simple source code. (Stacks and packages)

There is quite convenient macro "RepoHeader" on ROSwiki.

I faced this message

"Once you've created your own *-ros-pkg repository, you can document your stacks and packages on ROS.org. Start by submitting your repository to be added to our index. You can do this by e-mailing ros-users."

I don't understand "You can do this by e-mailing ros-users". This means e-mailling to ros-users@code.ors.org with what contents?

Our repository is "bzr branch lp:cyphy" and is it possible to be indexed and use "RepoHeader"?

image: I just downloaded openni_kinect and try to get depth image.

But it looks weird.

Is this right?

Cheers.

Hello, all.

Currently I am using "joint_state_publisher" node and "dynamic_configuration" node.

The pop-up window doesn't appear on my laptop but appear on my desktop.

The exact same code well works on my desktop which has Qt 4.7.0 and Qmake version 2.0.1a. Python 2.6.6 Ubuntu10.04, ROS diamondback 1.4.6.

My laptop also has has Qt 4.7.0 and Qmake version 2.0.1a. Python 2.6.6 Ubuntu10.04, ROS diamondback 1.4.6.

Is there anyone who encounter this problem?

Thank you for reading.

Hello, all.

As far as I know a kinect provides 640x480x3 size of 2D image data (widthxheightxRGB) and 640x480x(sizeof a point in 3D).

Is there anyone who knows the actual size of a point cloud?

640x480x4x3 ? widthxheightx(float)x(x,y,z) ?

Cheers.

Hello,

I'm trying to put dynamic_reconfigure package to my node.

But when I create a new node with the following tutorial, http://www.ros.org/wiki/dynamic_recon... , It doesn't publish any topic.

For the example on the dynamic_reconfigure package(testserver) also doesn't work. It just stops then I should press "Ctrl+\" to quit the process.

Is there anyone who encounter this problem?

Cheers.

Hello, all.

When I tried to launch the openni_camera with the command "roslaunch openni_camera openni_node.launch", I got weird errors.

===================================================================================
[openni_node1-1] process has died [pid 8338, exit code -11].
log files: /home/enddl22/.ros/log/d7cb5b9c-42ef-11e0-9bb4-d8d3857b0f6f/openni_node1-1*.log
===================================================================================

And roswtf said that

===================================================================================
ERROR Could not contact the following nodes:
 * /openni_node1

ERROR Errors connecting to the following services:
 * service [/openni_node1/get_loggers] appears to be malfunctioning: Unable to communicate with service [/openni_node1/get_loggers], address [rosrpc://BEE-PG-46634:60728]
 * service [/openni_node1/set_logger_level] appears to be malfunctioning: Unable to communicate with service [/openni_node1/set_logger_level], address [rosrpc://BEE-PG-46634:60728]

===================================================================================

I have diamondback and cturtle ROS packages and properly switched to diamondback using "source ./setup.bash" command.

Any comments could help me a lot.

Cheers