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2020-12-18 13:36:36 -0500 | marked best answer | virtual machine master to robotic armv7 node communication issues running a virtual machine as the master and having trouble getting rostopic to get data. always asks if my messages are built. Is there a way to confirm that they are built? Edit: I noted my question was vague without details... I attempt Response: Some googling says I should be able to run if I run (on virtual Machine MASTER (lvbuser001-VirtualBox)): and run (on ARMv7 (chip)): it works! if I run (on ARMv7 (chip)): and run (on virtual Machine MASTER): it fails! |
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2017-03-16 15:17:50 -0500 | commented answer | I can't find a differential drive package using rplidar with dc motors and no encoders The hope is that the navigation stack will look at the laser odom and the output geometry twist/ cmd_vel message for the arduino to follow... hope I did not confuse this any further... |
2017-03-16 15:14:15 -0500 | commented answer | I can't find a differential drive package using rplidar with dc motors and no encoders the motors are essentially open loop at the arduino level. the are no encoders to measure the distance traveled , so a pid at this level is not possible, unless I tried to bring the lidar odom data back down to the arduino. These I believe this would have a bit too much lag, but, I could be wrong. |
2017-03-16 15:10:40 -0500 | commented answer | I can't find a differential drive package using rplidar with dc motors and no encoders Thank you I will check it out now |
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2017-03-16 09:07:51 -0500 | asked a question | I can't find a differential drive package using rplidar with dc motors and no encoders I need help to find the appropriate drive controller, so far most seem to implement a pid with the encoders as a feed back mechanism. Surely someone has already done this.... Looking for a recommendation of how to implement this. Here are the specifics: all of the differential drive packages I have found so far seem to require encoders. My bot has an rplidar on it which is supposed to be able to provide odom via hector slam.(still having issues with this, but will post a separate thread) I do not have encoders. The goal is to have the rplidar provide the odom and the send the appropriate commands to the arduino that runs the l298 motor controller, this is a four wheel bot with only two motors, tank steer style. Hector slam package installed and Moveit planning is in process, but obviously need this to respond to a navigation stack, I believe my arduino MUST respond to cmd_vel so that is what I am trying to make happen. |
2017-03-14 10:54:44 -0500 | commented answer | ROS Chat Group? I absolutely agree. With as many of us involved in this, it shouldn't be too much of a task to get such a chat group going. I love answers as a resource, but whether you get a response is totally random... Time is valuable, for all of us, what can I do to help promote this idea? |
2017-03-07 07:26:39 -0500 | asked a question | Best tutorial on Hector Slam implementation, trying to resolve TF issues I have been working on this for about a week, I have run up against the normal issues and I am looking for a tutorial to help me through the next phase. Here is what I have done thus far: I have ros(kinetic) master installed communicating with a remote ros(indigo) machine that publishes data via rosserial from an rplidarA2 mounted on a differential drive mobile arduino controlled bot( no wheel encoders). Hector slam package is installed and functions when playing back the tutorials bagfile. If I attempt to switch to live data I can see the data, so I know it is present,but, I cant seem to get the live data and hector slam to play well together and publish the odom data. Current list of ongoing TASKS:
I need the Hector-Slam to work before, I can progress much further, I have attempted to work through all the tutorials I have found and have scoured this forum for applicable suggestions, specifically the correct way to launch RViz with live data from lidar. I am not asking for a handout, just a hand up, if you respond with--- go read the ros hector slam wiki, it is not helpful been there done that have like 15 t-shirts..... I do thank you for reading this far and all who have helped me make it thus far. This forum is full of experience, knowledge and great people. Looking forward to your suggestions, Best regards, W |
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2017-02-17 07:05:44 -0500 | commented question | Starting OVER.About to sacrifice a good laptop to my cause....Need Incantations... I mean "Advice"! wiped the laptop and installed ubuntu 16.04 /ros kinetic/ moveit all in just a few hours, completely different experience, compared with the last month.... Already further ahead then I was yesterday... Thanks for the information and assistance. |
2017-02-17 06:59:16 -0500 | commented question | Starting OVER.About to sacrifice a good laptop to my cause....Need Incantations... I mean "Advice"! Have tried multiple times to retag and edit this.... doesn't seem to work. |
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2017-02-16 13:29:50 -0500 | marked best answer | Indigo: build from source on C.H.I.P. fails: cc1plus killed I am using this set of instructions......... http://wiki.ros.org/indigo/Installati... Edit: I apologize, i honestly didn't know where to look. for precompiled binaries... Any hints? I was perhaps under the mistaken impression that they did not exist. https://erlerobotics.gitbooks.io/erle...
I don't know when this was written so perhaps it is out of date. NOTE: I am on a Debian Jessie platform...... |
2017-02-16 13:15:35 -0500 | commented answer | libfcl-0.5-dev cant resolve depends Please look at this for me..... http://answers.ros.org/question/25487... |
2017-02-16 13:13:51 -0500 | asked a question | Starting OVER.About to sacrifice a good laptop to my cause....Need Incantations... I mean "Advice"! Have been on this road for about a month, and have hit some roadblocks, So here is my next thought, I have a laptop-Dell Inspiron N5110 I5 2430,8Gb ram, that is about to go to a dual boot world. What installations should I be looking at for a smooth start into ROS/Moveit. It is my daily coder but, this project has grown enough to risk what I have. Can't quite give up the win10 install yet.. |
2017-02-16 12:36:47 -0500 | commented question | libfcl-0.5-dev cant resolve depends I have had some successes to sustain me along my path. I was able, with your help to get rosserial running on a nextthing chip that is publishing data to a networked ROSMASTER, So I know it works.... Just hoping to get to the next level with the move it package. Thank you for your continued support |
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2017-02-16 11:17:57 -0500 | commented question | libfcl-0.5-dev cant resolve depends Indigo Branch... ROS already installed and is functioning(WOW... AMAZING) |
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2017-02-16 11:01:45 -0500 | asked a question | libfcl-0.5-dev cant resolve depends Building moveit from source on a debian jessie install on a hP Xeon Proliant server. my last issue was because my Thanks for all the assistance. Edit: Indigo Branch I think the stray period was my fingers....sorry for the confusion..... How do I verify amd64 or i386? If I remember correctly, i386. Edit: Here is: and: perviosly I was running on a virtual machine and I switched to actual hardware to overcome some of the challenges with moveit and the virtMach. The system I have available for this is an HP Proliant DL360 Gen 3 with 1 Xeon 2.4GHz processor( which I believe is 2 cores and 2Gb ram only, Ubuntu 16 lts , I could not solve the video issues to this latemodel, so I shifted to Debian. I was not sure of how well this setup would work with Kinetic so I tried to play it safe, down on the earlier versions of code base, I would love to be able to run kinetic and moveit, Just am unaware if my hardware with support it. Since it looks like I have to reinstall everything, please give me your suggestions. Downloading the AMD64 version of Debian now.... AWE CRAP.......(?) just verified... 32 bit only....crappp. |
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2017-02-16 10:02:49 -0500 | edited question | moveit cant find GLEW -Solved. sources.list problem Original Rosdep was done on the wrong directory by me.....sorry. This made it seem like it was a install issue, when it was not. Many thanks to gvdhoorn who continues to attempt to sove these issues that are mostly due to my own inexperience. Still working through the process. SOLVED. Attempting a build from source on a debian jessie installation, have rosdep all issues, yet it fails to build with an ..... Is this an env variable that should be set? ANY pointers would be helpful , thank you. As the ever present and helpful (gvdhoorn) requested Here is the additional data :) : Below is where I Rosdep'd the src dir: Here is the command I used to build the source: Here is where it seems to fail: Here was my attempt to install freeglut3: |