aarushg's profile - activity

Yes there is, it's called on_parameter_event. Example can be found in ros2 demos - https://github.com/ros2/demos/blob/ma

rclcpp parameter build fail I was trying to build the laser_proc repo for ros2 found here, but I am getting these errors

rclcpp parameter build fail I was trying to build the laser_proc repo for ros2 found here, but I am getting these errors

According to this PR, we can now initialize parameters via yaml file. I edited the talker example to have the parameter client so I can see the changes in parameters, but when I try to load the parameters via this line as given in the PR comments

ros2 run demo_nodes_cpp talker_with_params __params:=install/share/demo_nodes_cpp/talker_params.yaml

I get this error

terminate called after throwing an instance of 'std::runtime_error' 
what(): Failed to parse parameters install/share/demo_nodes_cpp/talker_params.yaml

anything I'm doing wrong?

yes, thank you. I wasn't aware of this yaml syntax it works now.

Initialize parameters via yaml in ros2 According to this PR, we can now initialize parameters via yaml file. I edited th

Hi, I was building ROS2 from source and I already had kinetic installed on my system. After following all the instructions here, I tried to see my environment variables to check if everything was fine(as I did with each distro of ROS1) but I got this output :

ROS_ROOT=/opt/ros/kinetic/share/ros
ROS_PACKAGE_PATH=/home/batman/rosbuild-packages:/home/batman/catkin_ws/install/share:/opt/ros/kinetic/share
ROS_MASTER_URI=http://192.168.88.10:11311
ROS_VERSION=2
ROSCONSOLE_FORMAT=${message}
ROS_HOSTNAME=192.168.88.223
ROSLISP_PACKAGE_DIRECTORIES=
ROS_DISTRO=ardent
ROS_IP=192.168.88.223
ROS_ETC_DIR=/opt/ros/kinetic/etc/ros

Here I can see the ROS_VERSION as 2 and the distro variable as ardent but the ROS_PACKAGE_PATH and ROS_ROOT is still set according to kinetic. Do I need to change that, if yes how?

You can see the Retrieving lists section in the end of this page http://wiki.ros.org/roscpp/Overview/Parameter%20Server.

For debugging, maybe you can try and see output of rostopic echo /fakeScan to check what values are actually being publi

ament build exception I was building fine with ament build, but after I unsuccessfully tried to use rosdep for a package

Thanks! But since I was using kinetic since a long time, it was already sourced, so is there a way to unsource it(reset

ROS2 environment variables Hi, I was building ROS2 from source and I already had kinetic installed on my system. After f