Tixiao's profile - activity

I will pose the answer for myself. The reason is that the MD5Sum value for visualization markers is changed for differen

I will pose the answer for myself. The reason is that the MD5Sum value for visualization markers is changed for differen

I will pose the answer for myself. The reason is that the MD5Sum value for visualization markers is changed for differen

Hi George, the revised answer is updated above.

I will pose the answer for myself. The reason is the MD5Sum value for visualization markers is changed for different RO

I think this is the correct answer.

I am running Ubuntu 14.04 and indigo on my host computer. I want to visualize some rviz visualization markers on my remote laptop. However, I cannot install Ubuntu 14.04 on my laptop since some hardware problems (too new?kabylake). So I installed Ubuntu 16.04 and kinetic instead. However, when I subscribe to the same topic, I get this error:

[ERROR]: Client [/rviz_1493900002586455363] wants topic /prm_graph to have datatype/md5sum [visualization_msgs/Marker/4048c9de2a16f4ae8e0538085ebf1b97], but our version has [visualization_msgs/Marker/18326976df9d29249efc939e00342cde]. Dropping connection.

I checked that the message type both are "visualization_msgs/Marker". The only difference is those numbers and letters. Any idea why this is happening? I guess it is because the ROS version is different.

I will pose the answer for myself. After looking at the document of visualization_msgs, I notice that uint8 DELETEALL=3

BTW, the Rviz is running ok on another client computer that is installed with Indigo.

I agree. We using velodyne over a wireless network. When we use a 300M mini router, we only get a publish frequency of 2

Rviz Client md5sum Error I am running Ubuntu 14.04 and indigo on my host computer. I want to visualize some rviz visuali

I am also having this problem right now. It seems that they don't want any people to use Turtlebot now.

Hi, I wrote an global planner for my turtlebot. But when I tried to source my .bashrc, only one setup.bash can work. When I source ~/turtlebot/devel/setup.bash, I can use simulator or navigation . But I need to load my own planner plugin, so I source ~/catkin_ws/devel/setup.bash, Then I can see the plugin. But I can not use anything about turtlebot now. It seems that source ~/turtlebot/devel/setup.bash is cancelled. If I source ~/turtlebot/devel/setup.bash again, I can use turtlebot but I can not see my plugin, source ~/catkin_ws/devel/setup.bashstopped working. Can anybody help me with this? For convenience, I usually put all such things in .bashrc file. But it seems that only one setup.bash can work at a time.

"Unfortunately it seems that the robot cannot localize and navigate badly."

In the .world file, you should have the exactly same objects those exist in your .pgm file, so the robot can localize itself using the objects. For example, if you have a black square object in the .pgm file, when you create your .world file, you should put a same size object there. In the gazebo simulation, when the robot gets close to the object, the robot will know "oh there is an object ahead of me in the real world, and there is also one object like this in the .pgm map you gave me. I must be at the front of this object. Yes, I know where I am."

Hi guys, Our lab just received a videoray Pro 4 (underwater robot). But all the software are offered in Windows. Our leader want to implement this robot using ROS in linux. Any ideas or suggestions how to deploy it?