vKuehn's profile - activity

it works launch arguments not with sys args and is over complicate- If you have a simpler explenation how to give sys ar

can you kindly link the duplicate ?

Launch parameters get converted HI, with that launch file from launch import LaunchDescription from launch_ros.actions

Launch parameters get converted HI, with that launch file from launch import LaunchDescription from launch_ros.actions

After copy and paste working source files from an ubuntu humble to ubuntu foxy the launch didn't work.

So I did

colcon test
colcon test-result --verbose

the long list with mainly flake8 issues starts with

could not find copyright notice

for the launch files but I can't find any notice in the documentation about launchfile copyrights. why does this happens ?

thanks a lot. that explains it. Thought the most open source projects have one license file valid for the source at a wh

Why need launchfiles a copyright ? After copy and paste working source files from an ubuntu humble to ubuntu foxy the la

searching for ros2 and web brought back many manuals mentioning ros(1 ?) and web tools or rosbridge.

what would be the best approach creating a website with access to a ros2 middleware ?

thanks for that and keeping answering

that's the ros1 documentation. but thanks for the hint

@ljaniec that is very probably the case. But how to fix such a problem I would have hoped for some hint during the start

ros2 launch turtlebot3_cartographer cartographer.launch.py works fine.

colcon_cd PACKAGENAME to ~/dev_ws/src/PACKAGENAME works fine.

colcon build --packages-select PACKAGENAME works fine in ~/dev_ws.

I have that in ~/.baschrc

export _colcon_cd_root=~/dev_ws
export ROS_DOMAIN_ID=1
export ROS_PYTHON_VERSION=3
export ROS_VERSION=ros-foxy
export LC_NUMERIC="en_US.UTF-8"
source /opt/ros/foxy/setup.bash
source /usr/share/colcon_cd/function/colcon_cd.sh

What to check why ros2 launch PACKAGENAME.launch.py would fail ?

solved.. a package install was missing for one of mine under ~/dev_ws/src. After installing that ros2 launch works fine

oh yes that is what I did. Corrected the question for that it worked but now complains Package 'PACKAGENAME' not found:

oh yes that is what I did. Corrected the question for that it worked but now complains Package 'PACKAGENAME' not found:

ros2 launch fails after following some tutorials ros2 launch turtlebot3_cartographer cartographer.launch.py works fine.

ros2 launch fails after following some tutorials ros2 launch turtlebot3_cartographer cartographer.launch.py works fine.

ros2 simple message to rosbridge_suite on ros2 foxy( Ubuntu 20.04) I installed rosbridge Through a web socket I created

found the answer in the testcode of rosbridge suite creating the topic { "op": "advertise", "topic": "/a_topic", "type"

probably a routing problem can you ping from the pc to the raspberry ?

ros2 simple message to rosbridge_suite on ros2 foxy( Ubuntu 20.04) I installed rosbridge Through a web socket I created

Hi,

once a python package grows I would like to get files in module subfolders below the package. Also maybe other ressources as config or picture files would be good

How could I develop modules below the ros2 package make available to the ros2 package ?

To verify I have created that example package try_srv

where the test script combine_two_strings.py works fine

but the service combine_two_strings_server.py

failes with 'No module named combiner'

Thanks for any hint on that

trying to work myself through the tutorials for ROS2 so I am new to it

Sometimes tutorials refer to ros2 demos and sometimes to ros2 examples and both are actively used.

Is that a historically grown thing ? if not when should I to look at which ?

Hi,

I have this code and print would work but rospy.loginfo

 import rospy

from std_msgs.msg import String
messageToRos = Queue.Queue()

def writeMessageToRos(messageToRos):
    pub = rospy.Publisher('chatter', String, queue_size=10)
    rate = rospy.Rate(10) # 10hz
    while not rospy.is_shutdown():
        msg = messageToRos.get()
        print 'new messageToRos: ', msg
        rospy.loginfo('new messageToRos: ', msg)
        pub.publish(msg)
        rate.sleep()

even the publisher works fine. How would I correctly do a loginfo or debuginfo for msg ?