Simple kinematics tutorial

Hi.

I follow the simple kinematics tutorial.

when I type roscore or roslaunch rosbot_ekf all.launch, I had the fallowing error message.

How can I handle it ?

Hi Chokings,

I think the solution is described on the page to which the link is provided in the screenshot you attached (ROS/NetworkSetup - ROS Wiki).

Try to run this lines on all terminals you use:

export ROS_MASTER_URI=http://localhost:11311
export ROS_HOSTNAME=localhost

Then roscore and roslaunch should initialize correctly. If it works, you can add this lines to .bashrc script so you don’t have to repeat this step in every new terminal you open.

If this solution doesn’t works, try running ping device-7b3c76 and let me know what the result is.

If you have any questions or concerns, do not hesitate to let me know.

Best regards,
Paweł