sinsinsinsin's profile - activity

Thanks. I didn't try this tool but eventually manually saved the info in ASCII format. I will try this tool next time

Thanks. I didn't try this tool but eventually manually saved the info in ASCII format

bag_to_pcd invalid characters Hello I transformed a rosbag file to pcd file by ros_tool bag_to_pcd. with some success

bag_to_pcd invalid characters Hello I transformed a rosbag file to pcd file by ros_tool bag_to_pcd. with some success

Hi, I am following the turtlebot3 tutorial.

In remote-PC, run

roscore

In turtlebot terminal, run

roslaunch turtlebot3_bringup turtlebot3_robot.launch

then, back to remote-PC, run

export TURTLEBOT3_MODEL=buerger

rosrun rviz rviz -d rospack find turtlebot3_description /rviz/model.rviz

can see the rviz GUI and the scan points.

then run,

rqt

can see the topics like odom, scan, battery, cm_vel_rc100, imu ....... then run,

roslaunch turtlstrong textebot3_teleop turtlebot3_teleop_key.launch

no error, see the wasd instructions. typing w, can see the acc refreshing with new speed.

currently: linear vel 0.09 angular vel 0.0

currently: linear vel 0.01 angular vel 0.0

but the robot doesn't move. In topic "cmd_vel" is updated with new speed, but in topic "cmd_vel_rc100 " the speed is still 0.

thank you

Hi, This is a simple question but troubled me hours.

I am following the turtlebot3 tutorial. Setting up the bashrc of host-pc with PC IP address 192.168.48.132 :

export ROS_MASTER_URI=http://**192.168.48.132**:11311
export ROS_HOSTNAME=**192.168.48.132**

Setting up the bashrc of turtlebot3 with its own IP 192.168.137.192 :

export ROS_MASTER_URI=http://**192.168.48.132**:11311
export ROS_HOSTNAME=**192.168.137.192**

Then, run the roscore on remote PC with the printout like this:

Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://192.168.48.132:38089/
ros_comm version 1.12.14

SUMMARY

PARAMETERS
 * /rosdistro: kinetic
 * /rosversion: 1.12.14

NODES

auto-starting new master
process[master]: started with pid [2167]
ROS_MASTER_URI=http://192.168.48.132:11311/

setting /run_id to ee0e1f5e-41df-11ea-8d67-000c29f89067
process[rosout-1]: started with pid [2180]
started core service [/rosout]

then run

roslaunch turtlebot3_bringup turtlebot3_robot.launch on turtlebot3

get 'unable to contact ROS master at [http://192.168.48.132:11311/]'

the bashrc setting ip is the same but why the turtlebot cannot find the ros master?

Thank you

LIMO-SLAM ? https://github.com/johannes-graeter/limo But I didn't successfully set up it on my machine.

ROS_HOSTNAME / ROS_IP is set to only allow local connections, so a requested connection to 'xxx' is being rejected. Hi g

Is Cartographer result consistent? Hi, I have run the cartographer slam with the same bag file multiple times. There i

Oh, sounds not good. I just roscore, set /use_sim_time true, roslaunch turtlebot3_slam turtlebot3_slam slam_methods:=gma

Hi everyone

I am running gmapping with my own bag (in which I drive turtlebot with turtlebot_telop node, drive the robot go around the simulation environment.)

Then I start roscore, set use_sim_time true, run gmapping, play the bag file.

The gmapping works, but terminal sometimes outputs

[ WARN] [1583861539.918718206, 587.563370629]: Detected jump back in time of 0.000629371s. Clearing TF buffer.

It seems like there was a jump in the timestamp? It is the problem with my bag file of the gamapping settings?

Thank you!

------updates-----

I set the /use_sim_time to 0.1, now it works fine without warning.

Hi

I am using stage_ros to simulation slam.

The Gmapping works but I noticed that stage_ros is publishing "nav_msgs/Odometry" information under the topic /odom.

While the gammping node is subscribing the /tf topic to get odom data.

I checked the message under topic /tf, it was "tf2_msgs/TFMessage".

And I echo both of those topics. seems like the /tf topic is publishing the transform between difference frame (yes, as expected.)

But the stage_ros node publishes the twist data under topic /odom like the image below

So, I am interested in how the gmapping get odometry information from the topic /tf. Or, if I have /odom topic, can I setting gmapping to subscribe from that?

Thank you

Thank you. I found the TF tutorial on the wiki. Got a better though after running the tutorial.

Hi, Thank you for answering. Is that right if the message jumps out during playing a bag file. If i understand is correc

Yes, I understand it is a boolean. I can't remember in which slam system, I get the /use_sim_time, got a result of 0.1.

Hi, If I remember this correctly. The problem is gazebo parameter setting. If you check the launch file / lua file, you