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2023-05-07 19:43:43 -0500 | commented answer | Please can someone help me to link ros node with opencv correctly. I was doing the edit. Possibly I never committed it. It is not worth doing it again because I found the problem - and |
2023-05-07 09:47:15 -0500 | commented answer | Please can someone help me to link ros node with opencv correctly. I have done what you suggested - removed all of opencv from /usr/local. Now both the working and non-working programs ap |
2023-05-07 08:56:48 -0500 | commented answer | Please can someone help me to link ros node with opencv correctly. I have done what you suggested - removed all of opencv from /usr/local. Now both the working and non-working programs ap |
2023-05-06 13:45:57 -0500 | asked a question | Please can someone help me to link ros node with opencv correctly. Please can someone help me to link ros node with opencv correctly. I am at my wits end trying to get a simple ROS node t |
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2023-04-02 09:19:40 -0500 | asked a question | Does noetic libopencv-dev use gstreamer ? Does noetic libopencv-dev use gstreamer ? I have a small ros node which uses opencv to read an image. There is no expli |
2023-04-02 08:15:45 -0500 | asked a question | How to make catkin_make use correct opencv version ? How to make catkin_make use correct opencv version ? I am using ROS Noetic on Lubuntu 20.04. I am trying to compile a s |
2023-04-02 08:15:00 -0500 | asked a question | How to make catkin_make use correct opencv version ? How to make catkin_make use correct opencv version ? I am using ROS Noetic on Lubuntu 20.04. I am trying to compile a s |
2023-02-25 08:21:47 -0500 | asked a question | How can I debug this OpenCv/gstreamer issue ? How can I debug this OpenCv/gstreamer issue ? I am trying to communicate with an ESP32 Cam from ROS1 (using ROS Noetic o |
2023-02-25 08:19:47 -0500 | asked a question | How can I debug this OpenCv/gstreamer issue ? How can I debug this OpenCv/gstreamer issue ? I am trying to communicate with an ESP32 Cam from ROS1 (using ROS Noetic o |
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2021-07-12 12:12:05 -0500 | marked best answer | Why does service not work from launch file ? I create a permanent service, and its client in my launch file. All subsequent service calls fail. I have discovered that if I kill the client and run it from the command line, then the service calls work. The service also works if I call it directly from the command line using 'rosservice'. I have also discovered that making the service temporary solves the issue. I suspect that the launch file does something before the service is ready, but I don't know what. I still want to use a permanent service for efficiency. What can I do to fix the problem ? |
2021-07-12 12:11:56 -0500 | answered a question | Why does service not work from launch file ? I found a discussion on ROS Answers which solved the issue for me. It is here. I simply needed to wait for the service |
2021-07-12 11:28:04 -0500 | commented question | Why does service not work from launch file ? Yes, I did mean 'persistent'. I don't even remember where I got the idea they were called 'permanent' connections now. |
2021-07-09 03:33:46 -0500 | received badge | ● Popular Question (source) |
2021-07-06 23:05:00 -0500 | asked a question | Why does service not work from launch file ? Why does service not work from launch file ? I create a permanent service, and its client in my launch file. All subseq |
2021-07-03 19:02:22 -0500 | commented answer | How do I set environment variable for node launched on remote machine ? Thanks for your suggestion. It seems blindingly obvious now, but at the time I was reeling from trying to follow what w |
2021-07-03 19:01:39 -0500 | commented answer | How do I set environment variable for node launched on remote machine ? Thanks for your suggestion. It seems blindingly obvious now, but at the time I was reeling from trying to follow what w |
2021-07-03 19:00:54 -0500 | commented answer | How do I set environment variable for node launched on remote machine ? Thanks for your suggestion. It seems blindingly obvious now, but at the time I was reeling from trying to follow what w |
2021-07-03 18:51:11 -0500 | marked best answer | How do I set environment variable for node launched on remote machine ? I have a launch file which runs some nodes on a remote machine. I declare the remote machine as follows: and launch a remote node with: The node uses Google cloud speech API and requires an environment variable of the form: Currently I edit env.sh in devel_isolated, but that gets overwritten when I make the workspace. I have traced through the shell scripts, which include other scripts, which include other scripts and hooks etc. It left my head spinning ! Can anyone suggest a good way(i.e. minimal changes to ROS boilerplate) to set this up, so that:
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2021-07-03 18:17:37 -0500 | edited question | How do I set environment variable for node launched on remote machine ? How do I set environment variable for node launched on remote machine ? I have a launch file which runs some nodes on a |
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2021-07-02 22:36:40 -0500 | asked a question | How do I set environment variable for node launched on remote machine ? How do I set environment variable for node launched on remote machine ? I have a launch file which runs some nodes on a |
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2021-05-26 07:40:17 -0500 | marked best answer | Why does catkin_make fail when package depends on 'move_base' ? I have been using ROS for a few days and I am following the tutorial for setting up the Navigation Stack. It tells me to create a package as follows: Since tf and odom are handled in the zen package, and my sensor is a Kinect, my actual command is: When I execute catkin_make I get an error due to move_base: I googled and subsequently removed the error by:
So my questions in order of importance are:
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2021-05-26 07:34:44 -0500 | commented question | Is there any reasonable way to build a ROS GUI with PyQt on Raspberry Pi2/Melodic/Ubuntu 18.04 ? I tried Lubuntu 20.04 on the Pi 2 (with the intention of using Python 3 based ROS Noetic). It was a non-starter - Lubun |
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2021-05-08 20:55:45 -0500 | marked best answer | Why is catkin_make_isolated trying to build so much ? Basically I don't understand the ROS build system. I installed ROS from source on a Raspberry Pi 4 under Raspbian Buster Stretch using this method. I also managed to get raspicam_node to compile and install. I used Raspbian because it provides support for the Pi's GPU. Everything works, but whenever I try to build my own package with catkin_make_isolated, ROS appears to try to rebuild the entire system - it takes hours ! Also I don't know if I should be using catkin_make(like I always used to), or catkin_make_isolated. I don't know why ROS wants to rebuild the whole system - I installed the system to /opt/ROS/melodic, and thought that it should now just recompile my own package. Something has got very messed up. My directory structure is now:
I don't think I should have build and build_isolated etc. Some packages exist in both, and some are just in one. I don't know why I have both. Any clarification would be welcome. |