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2012-10-03 07:41:05 -0500 asked a question Send messages to the engines using ROS with Lego NXT

Following the site How do I make the motors work? How does one send a message to brake, or to make the motors move?????

The site is hazy, I'm having trouble understanding it.

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2012-09-13 03:47:11 -0500 asked a question Robots NXT

I installed ROS FUETE in my OS, Ubuntu 11.10, now I'm installing ROBOTS NXT with ROS, I followed this web site :::, but I have problems with the command """rosrun nxt_python""" in the section 1.7, the following error is shown: iohan@iohan-HP-Compaq-8200-Elite-SFF-PC:~/fuerte_workspace$ rosrun nxt_python[rospack] Error: stack/package nxt_python not found


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2012-09-01 06:22:14 -0500 commented question I'm with problems in steps 4 and 5, the tutorial Overlays.

turtlebot hg e47d5a1dca1c sandbox

2012-09-01 06:20:36 -0500 received badge  Editor (source)
2012-09-01 06:18:21 -0500 commented question I'm with problems in steps 4 and 5, the tutorial Overlays.

iohan@iohan-HP-Compaq-8200-Elite-SFF-PC:~$ rosws info workspace: /home/iohan/fuerte_workspace ROS_ROOT: /opt/ros/fuerte/share/ros

Localname S SCM Version-Spec UID (Spec) URI (Spec) [http(s)://...] --------- - ---- ------------ ----------- ---------------------

2012-09-01 04:35:05 -0500 asked a question I'm with problems in steps 4 and 5, the tutorial Overlays.

In steps 4 and 5, I can not execute the commands of their.

The following erros are shown:

iohan@iohan-HP-Compaq-8200-Elite-SFF-PC:~$ roslocate info turtlebot | rosws merge -
Traceback (most recent call last):
  File "/usr/bin/rosws", line 64, in <module>
  File "/usr/lib/pymodules/python2.7/rosinstall/", line 551, in rosws_main
    return ws_commands[command](workspace, args)
  File "/usr/lib/pymodules/python2.7/rosinstall/", line 259, in cmd_merge
  File "/usr/lib/pymodules/python2.7/rosinstall/", line 612, in prompt_merge
  File "/usr/lib/pymodules/python2.7/rosinstall/", line 512, in _get_element_diff
    diff = string_diff(old_val, new_val)
  File "/usr/lib/pymodules/python2.7/rosinstall/", line 139, in string_diff
    str1 = str1.ljust(len(str2))
AttributeError: 'list' object has no attribute 'ljust'

the previous steps were executed successfully.

2012-08-31 06:55:37 -0500 asked a question Problem creating new packages, error in workspace.

Creating new packages,typing the following comand :

$ roscreate-pkg std_msgs rospy roscpp

Below The lines:

WARNING: current working directory is not on ROS_PACKAGE_PATH!
Please update your ROS_PACKAGE_PATH environment variable.
Created package directory /home/iohan/rosws_tutorial/test
Created include directory /home/iohan/rosws_tutorial/test/include/test
Created cpp source directory /home/iohan/rosws_tutorial/test/src
Created package file /home/iohan/rosws_tutorial/test/Makefile
Created package file /home/iohan/rosws_tutorial/test/manifest.xml
Created package file /home/iohan/rosws_tutorial/test/CMakeLists.txt
Created package file /home/iohan/rosws_tutorial/test/mainpage.dox

Please edit test/manifest.xml and mainpage.dox to finish creating your package

So,I think the problem is in the creation the my workspace, but I followed all steps the tutorial, I'm with errors the creation the my workspace.

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2012-08-30 11:46:51 -0500 commented question Two ros root defined in config

I'm from Brazil....rsrs

2012-08-30 11:45:47 -0500 asked a question Two ros root defined in config

I'm the following problem.

(Over-)Writing, setup.bash, and setup.zsh in /home/iohan/ros ERROR in rosinstall: Two ros roots defined in config, delete one: /home/iohan/ros/ros /opt/ros/fuerte/share/rosiohan@administrador:~$

Two ros root, how to solve? help, help,