No /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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