[ros-users] NXT ROS - help and advice

Sat Sep 4 20:05:49 UTC 2010

I updated the installation page to include starting a roscore

-Melonee

On Sat, Sep 4, 2010 at 10:55 AM, Tully Foote <tfoote at willowgarage.com>wrote:

> Hi Juan,
>
> You need to run roscore in a seperate terminal first.  This is using ROS
> to communicate and the roscore is how different nodes find each other on
> the network.  I suggest that you try out the tutorials at
> http://www.ros.org/wiki/nxt/Tutorials to get started.  The test script
> you are running is a script we use internally when debugging the sensor
> drivers.
>
> If you want more on the communication protocols it's documented on
> http://ros.org I recommend you start with the introduction at
> http://www.ros.org/wiki/ROS/Introduction  Also if you want to get
> familiar with ROS there are numerous tutorials to help you get started
> using ROS at http://www.ros.org/wiki/ROS/Tutorials
>
> python-nxt which we use to talk to the brick does expect the NXT-G
> firmware.
>
> Tully
>
> Juan Antonio Breña Moral wrote:
> > Good evening,
> >
> > this evening I installed ROS and the support for NXT.
> >
> > I open a shell and typed the following stamement to run the first
> example:
> > rosrun nxt_python touch_sensor_test.py
> > //
> >
> > The answer from the system was:/
> > /
> > /domotica at domotica-laptop:~$ rosrun nxt_python touch_sensor_test.py
> > //Unable to register with master node [http://localhost:11311/]: master
> may not be running yet. Will keep trying./
> > What happen?
> >
> > The NXT brick has installed latest firmware for NXT-G, firmware 1.29.
> > Normally I use LeJOS with latest release (0,85) but I suppose that
> > ROS-NXT use original firmware inside the brick.
> >
> > What is the communication protocol? LCP?
> >
> > Cheers
> >
> >
> > Henry Acevedo escribió:
> >> Hi I'm new with ROS  ,as I want to test the NXT, I did the complete
> >> installation and as I'm using the Bluetooth dongle recommended by
> >> Lego with my laptop (Ubuntu) but I cannot connect I got an error
> >> [ERROR] 2010-09-02 22:03:50,429: [Errno 111] Connection refused
> >> Unable to register with master node [http://localhost:11311]: master
> >> may not be running yet. Will keep trying.
> >> [INFO] 2010-09-02 22:04:52,563: signal_shutdown [signal-2]
> >> [WARNING] 2010-09-02 22:04:52,565: cannot unregister with master due
> >> to network issues
> >> [INFO] 2010-09-02 22:04:52,565: signal-2
> >> [INFO] 2010-09-02 22:04:52,674: connected to core topic /rosout
> >> [ERROR] 2010-09-02 22:04:52,736: Unable to initialize /clock: [Errno
> >> 111] Connection refused
> >>
> >>
> >> but not sure how to fix this issue,
> >>
> >> please any help will be appreciated
> >>
> >>
> >> Thanks
> >>
> >>
> >> ------------------------------------------------------------------------
> >>
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> >
> >
> > --
> >
> > Juan Antonio Breña Moral
> > www.juanantonio.info
> > www.roboticaenlaescuela.es
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