tonio's profile - activity

Hi! I need help to create a topic for the communication between a gazebo plugin and a ros node. The plugin receives the GPS measures and it should publish on a ros topic the data. The problem is that I have not understood how to make the communication between the plugin and the ros topic. Have you got any idea? Thanks!

Hi guys! I'm in trouble with creating the map of the willowgarage (i'm using it just for practice). I think that the problem is related to record the laser scan in the bag. I'm following this procedure for the creation of the bag and of the map: 1. roslaunch gazebo_ros willowgarage_world.launch
2. insert the robot in the environment
3. rosbag record -O example /laser_scan

For the creation of the map:
1. roscore
2. rosparam set use_sim_time true
3. rosrun gmapping slam_gmapping scan:=laser_scan
4. rosbag play --clock example
5. rosrun map_server map_saver -f map_example

From executing these commands, at the end, the server is waiting for the map without reaching any result. In the gmapping process, I have warning like:
[ WARN] [1500976433.556165904, 15.058000000]: MessageFilter [target=odom ]: Dropped 100.00% of messages so far. Please turn the [ros.gmapping.message_notifier] rosconsole logger to DEBUG for more information.

[ WARN] [1500976494.043539452, 0.045000000]: Detected jump back in time. Clearing TF buffer.

What is the error in the procedure that I'm following? Thanks!

I tried to build the map in real time without the bag through rviz but when I add the LaserScan topic, it says me that t

Map gazebo world SLAM Hi guys! I'm in trouble with creating the map of the willowgarage (i'm using it just for practice)

Communication Gazebo Ros GPS Hi! I need help to create a topic for the communication between a gazebo plugin and a ros n

If I set an orientation goal (a geometry_msgs::Pose) equal to (0,0,1,1), it should rotate of 180° but the warning shows

I obtain this warning: MSG to TF: Quaternion Not Properly Normalized, what's that? By the way, surfing the web, I found

Quaternion rotation Hi guys, i'm having some problems with the rotation through quaternions. I have two quaternions comi

Sorry, I didn't know! :) By the way, thanks for the answer, it's helped!

Hi guys, my problem is that I got a segmentation fault when I assign a value to the axes of a joy message.

Here I post my code:

sensor_msgs::Joy out;
double linear_, angular_;

out.axes[1] = linear_;
out.axes[3] = angular_;

Assign value to axes Joy message Hi guys, my problem is that I got a segmentation fault when I assign a value to the ax

Turtlebot_gazebo blocked Hi guys, when i launch: roslaunch turtlebot_gazebo turtlebot_world.launch Gazebo starts its ex