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2019-09-27 06:34:41 -0500 commented answer Node unable to subscribe the specified topic

What @Delb said, also, you might want to have a look at this question for an example implementation.

2019-09-27 04:44:17 -0500 commented question Node unable to subscribe the specified topic

How are you launching your nodes, maybe you can post the launch files as well. From the negotiator node you have posted

2019-09-26 06:48:37 -0500 commented question How to Subscribe to a topic that one node is publishing on while publishing on the same topic for a different node?

Not sure about the explained well part, I'm getting a strong XY problem vibe from it. You talk a lot about what you have

2019-09-12 05:17:27 -0500 commented answer Why does RVIZ complain that I have to transform from right_wheel to base_link?

To add the remap to controller_spawner you will need to reverse the from an to. Check with rosnode info controller_spawn

2019-09-12 05:13:32 -0500 answered a question Why does RVIZ complain that I have to transform from right_wheel to base_link?

your problem is with ROS and Rviz, so the launch file to reproduce the problem could shortened quite a bit to make the p

2019-09-12 05:13:32 -0500 received badge  Rapid Responder (source)
2019-09-02 04:09:09 -0500 commented question TF status:warn and move robot in rviz

Never mind my previous comment, from the tf_tree you posted you can see that there are several unconnected pieces. Befor

2019-09-02 03:53:58 -0500 commented question TF status:warn and move robot in rviz

This seems like an Rviz configuration issue. It looks like you are trying to visualize "base_footprint" frame but your T

2019-09-02 03:26:53 -0500 commented question Is there any librabry or CDN for displaying LIDAR data in webpage

There are several projects doing browser based UI's for ros. This is one example https://github.com/rapyuta-robotics/zet

2019-09-02 03:25:40 -0500 commented question Is there any librabry or CDN for displaying LIDAR data in webpage

There are several projects doing browser based UI's for ros. This is one example https://github.com/rapyuta-robotics/zet

2019-08-22 07:44:35 -0500 commented answer Play .bag file from .launch error

"/home/bryan/Schreibtisch/ros_workspace/kitti_2011_09_26_drive_0002_synced.bag" would probably work, notice the / at th

2019-05-20 01:42:47 -0500 commented answer is it possible to add to the gmapping-generated map obstacles using GPS coordinates. Or any other messages expect LaserScan ?

@aksel you could have a node that takes in your scan, adds to that message some points based on your GPS coordinates and

2019-05-20 01:22:40 -0500 commented question How to use two topics without using TimeSynchronizer

I was wondering if there's a way where I can use two different functions that keep the last received messages in a globa

2019-05-20 01:22:20 -0500 commented question How to use two topics without using TimeSynchronizer

I was wondering if there's a way where I can use two different functions that keep the last received messages in a globa

2019-05-20 01:22:01 -0500 commented question How to use two topics without using TimeSynchronizer

I was wondering if there's a way where I can use two different functions that keep the last received messages in a globa

2019-05-20 01:21:49 -0500 commented question How to use two topics without using TimeSynchronizer

I was wondering if there's a way where I can use two different functions that keep the last received messages in a globa

2019-05-14 06:06:37 -0500 commented question see full launchfile from top tier one

I don't know of any utilities that would parse the launch file into a single file, but there is this package that can be

2019-05-13 06:06:51 -0500 commented question How to get the actual coordinate for all of the joint?

rosrun tf view_frames - will generate a pdf of the tf tree and save where your terminal is currently rosrun rqt_tf_tree

2019-05-13 06:06:32 -0500 commented question How to get the actual coordinate for all of the joint?

rosrun tf view_frames - will generate a pdf of the tf tree and save where your terminal is currently rosrun rqt_tf_tree

2019-04-17 03:14:00 -0500 commented question Publishing IMU data from executable

You could use the python module subprocess or os.popen to pipe the output of the program to your python node and test th

2019-04-17 03:13:26 -0500 commented question Publishing IMU data from executable

You could use the python module subprocess or os.popen to pipe the output of the program to your python node and test th

2019-04-15 03:26:00 -0500 commented question how can i take value from topic joy?

You need to run a joystick driver and use the messages the driver is publishing. Your question says nothing about what y

2019-04-15 03:24:25 -0500 commented question how can i take value from topic joy?

You need to run a joystick driver and use the messages the driver is publishing. Your question says nothing about what y

2019-04-15 03:24:11 -0500 commented question how can i take value from topic joy?

You need to run a joystick driver and use the messages the driver is publishing. Your question says nothing about what y

2019-04-11 04:27:56 -0500 edited answer The Question is regarding setting up the new workspace in the bashrc file.

your .bashrc has some duplicates. It should probaly look something like ... source /opt/ros/kinetic/setup.bash source

2019-04-11 04:26:49 -0500 answered a question The Question is regarding setting up the new workspace in the bashrc file.

your .bashrc has some duplicates. It should probaly look something like ... source /opt/ros/kinetic/setup.bash source

2019-04-10 07:35:12 -0500 commented question Simultaneous WiFi Internet + Ethernet Velodyne LIDAR Connections

Your problem is connecting to the raspberry pi over wifi when you have an ethernet cable plugged in to it? How is this a

2019-04-09 15:19:17 -0500 received badge  Nice Answer (source)
2019-04-09 08:27:50 -0500 answered a question Cannot save data Callback function

As I understand your main goal is to save some topic as a csv. If that is the case you can do that without writing a sin

2019-04-09 01:36:52 -0500 received badge  Good Answer (source)
2019-04-08 03:33:59 -0500 commented question navsat_transform_node map frame wrong orientation unless facing east

By getting the accurate heading estimation I mean filtering your gps readings in some node and calculating it based on t

2019-04-08 03:19:08 -0500 commented question navsat_transform_node map frame wrong orientation unless facing east

The IMU drifting to some random direction seems like it might be caused by using the magnetometer as part of the IMU ori

2019-04-08 03:15:49 -0500 commented question navsat_transform_node map frame wrong orientation unless facing east

The IMU drifting to some random direction seems like it might be caused by using the magnetometer as part of the IMU ori

2019-04-05 04:54:45 -0500 answered a question Using multiple RPlidar on a single system

You need to launch them in namespaces or use a different name attribute for each node and remap the topics to be differe

2019-04-05 02:43:14 -0500 commented answer Adding a namespace to robot frames

What @janindu said. Also whether the package in your WS or the package installed with apt is used depends on which ever

2019-04-03 00:47:04 -0500 commented answer Adding a namespace to robot frames

if you launched the nodes in a namespace the topics will also most likely be in the same namespace.

2019-04-02 23:11:07 -0500 received badge  Nice Answer (source)
2019-04-02 04:34:08 -0500 commented question ros melodic and usb cam

sudo apt install ros-melodic-usb-cam does not work? you can install it from source as well usb_cam

2019-04-02 03:42:46 -0500 edited answer Adding a namespace to robot frames

Points 1 and 3: You need to declare the tf_prefix parameter before you load anything that publishes TFs that should be i

2019-04-02 03:21:20 -0500 edited answer Adding a namespace to robot frames

Points 1 and 3: You need to declare the tf_prefix parameter before you load anything that publishes TFs that should be i

2019-04-02 03:21:20 -0500 received badge  Associate Editor (source)
2019-04-02 03:12:28 -0500 edited answer Adding a namespace to robot frames

Points 1 and 3: You need to declare the tf_prefix parameter before you load anything that publishes TFs that should be i

2019-04-01 03:32:46 -0500 edited answer Adding a namespace to robot frames

Points 1 and 3: You need to declare the tf_prefix parameter before you load anything that publishes TFs that should be i

2019-04-01 03:11:55 -0500 answered a question Adding a namespace to robot frames

Points 1 and 3: You need to declare the tf_prefix parameter before you load anything that publishes TFs that should be i

2019-03-28 02:46:57 -0500 commented question Function execution is slow in callbacks. Why?

First thing I would try would be setting ROS_BUILD_TYPE to Release in your CMakeLists.txt. Also clean build the package.

2019-03-28 02:46:32 -0500 commented question Function execution is slow in callbacks. Why?

First thing I would try would be to try setting ROS_BUILD_TYPE to Release in your CMakeLists.txt. Also clean build the p

2019-03-28 02:46:18 -0500 commented question Function execution is slow in callbacks. Why?

First thing I would try would be to try setting ROS_BUILD_TYPE to Release in your CMakeLists.txt. Also clean build the p

2019-03-27 09:46:07 -0500 commented question Confused with the launch file RTABmap

Why it tries to subscribe to /rtabmap/odom? As the wiki page you linked to in the end suggests: 1. If you have already

2019-03-27 09:35:08 -0500 commented question Confused with the launch file RTABmap

Why it tries to subscribe to /rtabmap/odom? As the wiki page you linked to in the end suggests: 1. If you have already

2019-03-27 09:33:56 -0500 commented question Confused with the launch file RTABmap

Why it tries to subscribe to /rtabmap/odom? As the wiki page you linked to in the end suggests: 1. If you have already