Andre Volk's profile - activity

I successfully installed ROS 2 beta 2 from source following this page. Today I tried to update my local ROS 2 source files. I followed the instructions on this page, but vcs gives me an error for each repo, when I run vcs pull src. Here comes one of the error messages:

 === src/ament/ament_cmake (git) ===
 You are not currently on a branch.
 Please specify which branch you want to merge with.
 See git-pull(1) for details.

 git pull <remote> <branch>

As I do not have much experience with vcs, I have no idea where this comes from. The "ros2.repos" file has version tags for each repo.

Is there something like the --prefix argument from rosrun in ros2 (see #q222530)?

Is there an easy way to switch between different controllers for a single resource? I would like to control a joint of my Gazebo model either by effort_controllers/JointPositionController or effort_controllers/JointEffortController. I want to switch between these controllers during runtime by pressing a joystick button.

Right now, I make 4 service calls:

1. Stop the current controller (by calling controller_manager/switch_controller)
2. Unload the current controller (by calling controller_manager/unload_controller)
3. Load the new controller (by calling controller_manager/load_controller)
4. Start the new controller (by calling controller_manager/switch_controller again)

Is there an easier way to do that, like loading both controllers at the same time and only start/stop the corresponding controllers by a single switch_controller call? As the SwitchController Service has parameters for both start_controllers and stop_controllers, this seems to be supported somehow. But if I try to spawn both controllers in a launch file, I get a "resource conflict" error.

The ROS Master_API will probably be your friend. Please also look at #q260633, which covers parts of your question. Wit

I could not find out quickly, how the rover model from Erlerobot generates GPS data, but you could try to use the simula

I could not find out quickly, how the rover model from Erlerobot generates GPS data, but you could try to use the simula

I believe Mapviz already supports NavSatFix. Try to compile the most recent version of Mapviz from Source, just to make

Arrrr! (https://discourse.ros.org/t/answer-ros-questions-like-a-pirate-day-2k18/6058)

The ROS Master_API will probably be your friend. Please also look at #q260633, which covers parts of your question. Wit