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2019-08-26 05:21:55 -0500 received badge  Notable Question (source)
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2019-05-29 08:17:18 -0500 commented answer Set delay between starting nodes within launch file

Thank you! That worked for me!

2019-05-28 10:02:10 -0500 commented question Very strange turn behavior with TEB planner

Hi, Were you able to solve the problem? I'm facing similar issues and I don't know what's wrong with my parameters. Th

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2019-05-02 08:02:07 -0500 marked best answer High latency images messages

Hello everyone,

I have a system composed of a robot (android machine using rosjava) and a computer (roscore), both correctly synchronized. The robot publishes rgb-d images over WiFi. The computer subscribes to these images in order to process them and carry out slam and navigation. The robot is also subscribed to these topics, in order to check if the images are correctly sent. My problem is that if the publishing rate in android is set to a value above 1 or 2 FPS, the latency between both systems start increasing. When I check the latency in the images messages in the master machine (using echo --offset), it starts growing quickly, starting at -1 sec, and finally obtaining values of -220 secs. However, if I check the messages received in the android machine, these are correctly received. Both machines are correctly synchronized. If the messages are publishes at a rate=1FPS, the latency is -1 sec approximately. When I start the SLAM node and the navigation module, sometimes this latency also starts growing, producing problems with the algorithms.

The problem is that in order to carry out SLAM and navigation modules, I need a higher frequency.

Anyone knows what causes this problem and a possible solution? Thank you very much in advanced.

2019-05-02 07:52:06 -0500 edited answer High latency images messages

Finally I was able to solve the problem creating a wired connection between the PC and the router. Now everything works!

2019-05-02 07:48:51 -0500 answered a question High latency images messages

Finally I was able to solve the problem creating a wired connection between the PC and the router. Now everything works

2019-05-01 05:55:49 -0500 commented question ROS over network is slow

Were you able to solve it? I had similar issues, but sending images over wifi. Thank you

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2019-04-30 10:25:56 -0500 asked a question High latency images messages

High latency images messages Hello everyone, I have a system composed of a robot (android machine using rosjava) and a

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2019-04-18 03:29:14 -0500 commented answer It is possible to create a map with rtabmap using the laser and obtaining 3D point cloud at the same time?

Hi Mathieu, Thank you very much for you quick answer! Cheers, Blanca

2019-04-18 03:28:39 -0500 marked best answer It is possible to create a map with rtabmap using the laser and obtaining 3D point cloud at the same time?

Hello,

I'm using rtabmap in order to carry out rgbd slam using a rgbd camera, odometry and a fake laser scan obtained from the rgbd camera. When I execute rtabmap, the generated grid_map is different if I set grid/fromDepth parameter to true or false.

If a set grid/fromDepth parameter to false, the map is created using the laser scan data, and the map obtained is good. However, if I try to visualize the cloud_map in rviz or saving this point cloud to a pcd file, only the points of the laser scan are visualized/saved.

On the other hand, if I set grid/fromDepth to true, I can visualize the complete 3D point cloud from cloud_map in rviz, and the pcd saved contains the complete point cloud. However, the generated grid_map is not too good, because is generated using all the points, not only the laser scan information.

Is there any way of creating the grid_map only using the laser scan information, and obtaining the complete 3D point cloud in cloud_map at the same time?

Thank you very much in advanced!

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2019-04-17 09:20:20 -0500 asked a question It is possible to create a map with rtabmap using the laser and obtaining 3D point cloud at the same time?

It is possible to create a map with rtabmap using the laser and obtaining 3D point cloud at the same time? Hello, I'm u