ira_laser_tools merger doesn't subscribe to topics from laser in gazebo
Hey together, please see edit #1 and #2. The node for the laser scanner won't subscribe to the topics given in its parameters in the launch file. But the scan topics are published correctly. I am...
View ArticleHow to Run Multiple Gazebo Simulations with Unique Clocks
As a follow on to my previous question: http://answers.ros.org/question/241005/gazebo-topic-publication-issue-within-namespaced-group-tag/ I'm trying to run multiple Gazebo simulations on one machine,...
View ArticleWhy could the time stamp for my bumper plugin be zero?
HI, I've got a bumper plugin on the `r_foot` link of the Atlas robot. The plugin publishes correct data to the topic, but the sec & nsec values in the header are always 0. I tried using the...
View Articletf::TransformListener gets wrong tf
Hello, TL;DR tf::TransformListener gets a different transform than shown in RVIZ I am having quite a strange problem. I am using a rosbag file to playback recorded data and I am adding new transforms...
View ArticleRosbag and simulated time
Hello all, I am trying to run a bag file if simulated time but I am not succeeding on it. Here is what happens: After I run the bag file with the command rosbag play --clock -l laser_scanner3.bag I am...
View ArticleConvert legacy logs to ROS bag
Is there a way to convert legacy logs to ROS bags? I have a set of sensors logs that were recorded before my project started using ROS. I am now converting everything to use ROS, but I still want to...
View ArticlePublish at the time of a vector
Dears, I have a vector containing double type numbers representing the ros time that I recorded from a previous simulation. I need to publish data of a node at this given time. I try to explain better:...
View ArticleGazebo is not publishing clock
My Gazebo is not publishing the clock anymore. I don't know what I did wrong. A few days ago it worked, but not anymore. "use_sim_time" is set to true (`rosparam get use_sim_time` returns true) The...
View ArticleHow to publish messages on a topic of type rosgraph_msgs/Clock?
Hello! I want to give values to a topic with this type of mesage (rosgraph_msgs/Clock) I create a variable called "reloj" for example: rosgraph_msgs::Clock reloj; How do I give a value to that...
View Articleuse_sim_time only for some of the running nodes
Is there some way to enable `use_sim_time` only for dedicated nodes? I have a scenario in which a node should use the simulated time published on `/clock` while at the same time other nodes are running...
View ArticleAnother question about extrapolation in the past
Hello all, That's a question that has been asked multiple times but none of the solution have worked so far. I'm playing data from a rosbag and when trying to query the tf I have this error: [ERROR]...
View ArticleROS2 clock stuck within inhereted class
Hello everyone, my clock always stuck at the moment the node start for the following code. I mimic the coding style of the demo talker node. Am I doing anything wrong? #include #include...
View ArticleHow use_sim_time works?
I am currently working on VIORB SLAM which using both camera and imu. I have to make the system work without ROS, but currently I successfully run the recorded datasets using use_sim_time only. This...
View ArticleWARNING: no messages received and simulated time is active. Laser Scan Matcher
ROS Kinetic - Ubuntu 16.04 Looking this up, all the forum posts I can find are either about gazebo or don't really have an answer. Laser Scan Matcher node takes an input and produces an output. The...
View ArticleWhy isn't ROS using its own clock server for live situations?
I'm well aware of the fact that if you run ROS nodes on multiple machines, you will need to synchronize system clocks between them (https://answers.ros.org/question/11570/ros-time-across-machines/). I...
View ArticleNo /clock topic being published when running map_server map_saver
Hello, I have been following the ROS gmapping tutorial, *How to Build a Map Using Logged Data*, and have run into a problem where the sim clock is not being published when I try to save a map from a...
View Articleros2: Clock sleep_until
Hi, Is there an implementation available for sleep_until or sleep_for with Clock interfaces on ros2? The document here says it does, http://design.ros2.org/articles/clock_and_time.html but could'nt...
View ArticleClock not publishing?
I'm launching a bumblebee2 stereo camera to get my input images. When I check the /clock topic, I don't see any timestamps being published. Is this abnormal?
View ArticleClock server as nodelet
I have a nodelet that should act as clock server when it is started in simulation mode. My problem is that if I set "use_sim_time" to true the "nodelet_manager" does not start because there is no clock...
View ArticleWhy does /clock slow down under 65% CPU load?
On Ubuntu 16.04, with 8 cores and lots of nodelets. Measuring `/clock` with `rostopic hz /clock` and using `rosbag play --rate xx`, I see that: --rate CPU load /clock 0.5 40% 50 Hz 1.0 65% 38 Hz 2.0...
View ArticleTF_OLD_DATA error after upgrading to Gazebo 8 from 7, ROS Kinetic
Thanks for looking! Been trying to rectify this issue for the past few days to no avail. **Background** The differential drive robot project had been worked on using ros kinetic and gazebo7 but I've...
View ArticlePointcloud to Laserscan on Simulated Jackal UGV w/ VLP-16
[Short video of problem description](https://imgur.com/a/CeAMpTh) I have a simulated Jackal equipped with only a VLP-16 sensor. I am trying to get it to do planned navigation but there are noticeable...
View ArticleHow to set up tfbuffer clock in ROS 2 so it works with sim time?
I'm working on the tip of the ROS 2 master branch. In the example code below, I have a deadlock when `use_sim_time` is active even though Gazebo is running and publishing `/clock` messages. I call...
View ArticleEnsuring time synchronization on multi-machine setup
Hi! I'm looking into time synchronization on multi-machine setup (that might or might not have access to internet while it's running). Let's assume 3 computers for the time being and no internet...
View Articlestart gazebo simulation with non zero clock time
When gazebo start the simulation it publish clock time to /clock topic. Some package use that time as their timestamps. Is there a way to tell gazebo to start counting from another time? px4 firmware...
View ArticleNode not receiving update after simulated time is update on /clock topic.
Hello, I am playing a bit with simulated time in ROS. I have one node that serves as the clock server, and another node that will do some calculations. At times it happens that if I start the...
View ArticlePose in stage_ros simulation is incorrect
Environment and package: ------------------------ Ubuntu 16.04, ros-kinetic, [stage_ros](https://github.com/ros-simulation/stage_ros) branch lunar-devel Problem encountered: -------------------- When a...
View ArticleCommunication between docker and host
Hi Guys, This is with respect to the [q313094](https://answers.ros.org/question/313094/is-clock-being-published/?comment=313100#post-id-313100), I was able to get rid of the ```/use_sim_time is not...
View Article[ROS2] msg stamp time difference
Hi, I'm trying to assess if the msg is too old by comparing current time and the msg time stamp. rclcpp::Time time_now = rclcpp::Clock().now(); double dt = (time_now -...
View ArticleWhat happens with `/clock` topic if you use Multimaster FKIE to connect two...
If I understand correctly, if you set `use_sim_tim` as true, the Gazebo simulation will use the time that is being published onto `/clock` topic. Now what happens if you are running two simulation and...
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