ERROR: Unable to communicate with master!
I have been trying to set up a turtle bot for the past couple days. So I went through the instructions found here and made it up to 5.4; when i typed in "rostopic list" into the workstation, it is unable to communicate with master.
ON WORKSTATION
echo $ROS_MASTER_URI
echo $ROS_HOSTNAME
192.168.1.100
ON LAPTOP
echo $ROS_MASTER_URI
echo $ROS_HOSTNAME
192.168.1.101
Laptop IP=192.168.1.101 Workstation IP=192.168.1.100
Any help with resolving this issue would be appreciated. Thanks!
thanks, i changed the ROS_MASTER_URI as you said, but it is still unable to contact master. Any other ideas?
Is the robot running? Did you start roscore? And don't set ROS_HOSTNAME to an ip address. Instead, use the variable ROS_IP.
when i start roscore i get WARNING: ROS_MASTER_URI [http://192.168.1.101:11311] host is not set to this machine
Did you set ROS_IP and unset ROS_HOSTNAME?
i set up the ROS_IP; how do I unset the ROS_HOSTNAME?