ERROR: Unable to communicate with master!
Hello,
My team and I have successfully went through this tutorial:
http://www.ros.org/wiki/Robots/TurtleBot/Network%20Setup
Everything worked fine. We uploaded the follower demo and used keyboard to move turtlebot around.
Then we decided to get fancy and ping another 2 computers to the netbook on turtlebot. It actually worked! We actually ran the follower demo successfully on all 3 computers one after the other and then one of use used the keyboard teleop and it worked as well.
Unfortunately, the success was short-lived. Soon after our third member left. We tried to access the netbook from our laptops and we kept getting an error when we just tried to 'sudo service turtlebot stop':
ERROR: Unable to communicate with master!
We checked our setting over 5 times and saw that everything from ROS_HOSTNAME and ROS_MASTER_URI was set EXACTLY like the tutorials and nothing was wrong but we kept getting the same error over and over. (Keeep in mind it ran without any issues for about the last 8-10 times we uploaded it something.)
If anyone could point us in the right debugging direction that would be great! We have googled and searched the answers.ros.org forum and we found nothing.
Any help would be GREATLY appreciated!
Thank you
