[ros-users] Problems with subscriber and spinOnce

[Ugo Cupcic]

Hi,

Your subscriber should be instantiated outside of your loop:

int main(int argc, char **argv)
{
        init(argc, argv, "testPlayer");
        NodeHandle n;

        Subscriber sub;
        sub = n.subscribe("scan", 1000, &testPlayer::callBack, &test);

        Rate loop_rate(5);

        testPlayer test;

        while ( ok() ) {

            spinOnce();

            loop_rate.sleep();
        }

  return 0;
}

This should work normally.

Cheers,

Ugo


On Thu, Feb 17, 2011 at 10:20 AM, Aslund <sebastian.aslund at gmail.com> wrote:

> Hey everyone
>
> I got a small problem writting a subscriber using the spinOnce command
> instead of the spin() used in the tutorial. I do not receive anything from
> the subscription, but I know topics are being published. rviz is showing
> that the data is published and if I rewrite the code to use spin() like in
> the tutorial, then I get plenty of information. I have tried to search the
> problem but did not find anything useful and I hope someone here can see the
> problem.
>
> My code is:
>
>
> Regards
>
> Sebastian Aslund
>
>
>
> _______________________________________________
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> ros-users at code.ros.org
> https://code.ros.org/mailman/listinfo/ros-users
>
>


-- 
Ugo Cupcic | Shadow Robot Company | ugo at shadowrobot.com
Software Engineer | 251 Liverpool Road |
need a Hand? | London N1 1LX | +44 20 7700 2487
http://www.shadowrobot.com/hand/ @shadowrobot
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