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2017-04-20 15:13:52 -0500 | marked best answer | Unable to compile workspace for unsolved reference to serial::Serial::waitReadable Hi to all, I'm kind of new to ROS and I'm having a problem while compiling the catkin workspace on my laptop. I'm using ROS Indigo on Ubuntu 14.04, and I'm trying to compile the It requires the packages
This makes me think that probably the compiler is not able to find the serial package. Now:
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2016-12-06 09:03:30 -0500 | commented answer | running rosmsg show from code Great, that was exactly what I was searching for, although I thought messages were managed in a more object-oriented like structure. Anyway, that worked perfectly. Thanks! |
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2016-12-05 11:22:07 -0500 | commented question | running rosmsg show from code I need to build instances of all the ros messages and services in a KB, so I need to understand which are all the messages/services being published, and which re their structures in terms of submessages/primitive types. |
2016-12-05 10:31:14 -0500 | asked a question | running rosmsg show from code Hi, is there a way (possibly in Python) to call the command line command |
2016-12-01 10:08:22 -0500 | commented question | Rviz crashing (core dumped) when running with Gazebo I have a Nvidia GeForce 640M. The drivers are the standard-default ones that come with ubuntu 14.04 (nouveau). I tried installing the proper ones (nvidia-375), but I just messed up xorg (graphic interface wasn't starting anymore). I rolled back, but yet no gazebo and rviz together working. |
2016-12-01 06:51:52 -0500 | commented question | Rviz crashing (core dumped) when running with Gazebo No, I'm running everything in a real Ubuntu 14.04. Funny thing is that if I run the same exact launch file on another laptop (definitely less powerful than mine), both gazebo and rviz can live together. I have to imply that there should be other problems on my laptop... |
2016-12-01 05:45:04 -0500 | asked a question | Rviz crashing (core dumped) when running with Gazebo Hi to all, I'm following a tutorial, for which I have to run a launch file that runs Gazebo (with a wold with three robots) and runs also rviz. What happens constantly is that rviz always crashes, while Gazebo keeps running. This happens also if I run rviz from command line with rosrun (while Gazebo is still on), terminating with the message Is it possible that my laptop is not powerful enough? |
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2016-11-29 11:44:53 -0500 | asked a question | Rosjava interacting with Master Hi, is there any example of how to use the classes to interact with the master node in rosjava (e.g. http://rosjava.github.io/rosjava_core/0.0.0/javadoc/org/ros/master/client/SystemState.html)? I can navigate the documentatino, but it's quite hard to understand where to begin. |
2016-11-08 11:55:36 -0500 | asked a question | Best configuration for hector_slam and Rplidar 2 I have a freshly new Rplidar 2 that I'd like to use to build some maps with my basic iRobot2 create. I tried using
Now, given that, my general question is: does anybody have accumulated enough experience to propose some really good configuration to use with hector_slam and Rplidar 2 on a wheeled robot, where for configuration I mean any possible configurable parameter (including publishing frequency of involved static transformation publishers)? |
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2016-10-20 03:14:05 -0500 | asked a question | ROS standard topics, messages and nodes Hi to all, I have a question that is really general, and I already know (more than) half of the answer, but for completeness I'd like to have information from people that might be more expert than me. I kind of understood that there is a set of "more or less" standard messages that have been defined within ROS ( http://wiki.ros.org/common_msgs?distr... ). I also think I understood that there is a set of nodes that is somehow "recognized" by the ROS community ( http://www.ros.org/browse/list.php?pa... ). While this is more or less clear (if I'm right), I can't figure how if there is also a standard for the topics, e.g. ROS tells you that the standard topic where to publish odometry is Is there any list of this "supposed to be" standard topic in this sense? And what about messages-services-actions that are used by recognized nodes (e.g. |
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2016-07-19 08:23:18 -0500 | answered a question | Inconsistency between move_base and stage_ros I actually found the solution. The name of the laser frame mismatched between the |
2016-07-19 08:19:36 -0500 | commented question | Inconsistency between move_base and stage_ros Sorry, that was a typo. Anyway I found the solution! |
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2016-07-13 12:02:34 -0500 | asked a question | Inconsistency between move_base and stage_ros Hi, I'm using move_base and stage_ros in the indigo release and I'm getting a strange behavior of the simulated robot. I'll try to explain it with an example: I have a map which is loaded both by the map_server for move_base and by stage (the map is the same, I checked). I'm also using amcl as localiser. Then, if I open rviz, I can clearly see the map, the robot, and what the robot is sensing with is laser. What the laser is scanning is exactly compliant with the map I see (that is the one published by the map_server). If I give a goal through the Nav2Goal tool, the robot starts moving, following the path evaluated by the motion planner. Everything ok until here. The strange behavior starts happening when the robot, for some reasons, gets stuck in an obstacle: at that point, in stage the robot is stuck (with the exclamation mark on it), while for move_base (and so in rviz) it keeps moving along the path. Moreover, the laser scan stays consistent with stage, so that it starts misaligning with the map in rviz. Even more strange, although the path is evaluated by move_base to avoid obstacles, the robot still drive over there without problem (only in rviz, not in stage, where, instead, it gets stuck generating the strange behavior). It seems like stage keeps publishing the odometry of the robot moving, and so move_base move the robot independently. Moreover, I get this warning on move_base
I checked the tf tree, and everything is connected as due. I report my launch and config files for consistency. test_move_base.launch </launch> test_stage.launch my_map.yaml my_map.world (more) |
2016-03-23 18:21:38 -0500 | marked best answer | Getting only the first snapshot of the scans with gmapping Hi, I've gone through one that seems to be a shared problem, as the following links testify
Some of them didn't received a satisfactory answers, while the successful replies to the others are not working for me.
I'm trying to make a map with an iRobot Create 2, using the What happen is that when I start The following picture shows a snapshot or what I see in rviz And the following picture instead shows my tfs (that are supposed to be correct, as far as I know) I already checked that my odometry, the base_link, the xtion and the laser tf are consistent with each other (as they move accordingly in rviz). I've also a bag, but I cannot yet upload it. I'm searching a space where to do it. As soon as I find it, I'll edit this post. |
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2016-03-23 15:42:15 -0500 | answered a question | Getting only the first snapshot of the scans with gmapping Solution found. The problem was a bug in the |
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