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2019-08-12 09:08:36 -0500 commented question RosSerial Arduino Mega Unable to Sync Device

Is it possible you have an uninitialised variable in the switch/case which is breaking the program?

2019-08-07 09:10:27 -0500 answered a question Which ROS package use with VICON?

Have you tried vicon_bridge? I used it a couple months ago and it worked out of the box.

2019-08-07 09:00:56 -0500 answered a question Is there a good Profiler for ROS?

What are the performance metrics you want to use for deciding if you want to break 1 node into many, or combine many int

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2018-12-10 09:52:33 -0500 edited answer Publishing Various Datatypes at Once

Q1: You can't publish multiple message types to a single topic. You could, however, publish each of these message types

2018-12-10 09:52:04 -0500 edited answer Publishing Various Datatypes at Once

Q1: You can't publish multiple message types to a single topic. You could, however, publish each of these message types

2018-12-10 09:51:05 -0500 edited answer Publishing Various Datatypes at Once

Q1: You can't publish multiple message types to a single topic. You could, however, publish each of these message types

2018-12-10 09:50:27 -0500 edited answer Publishing Various Datatypes at Once

Q1: You can't publish multiple message types to a single topic. You could, however, publish each of these message types

2018-12-10 09:29:44 -0500 edited answer Publishing Various Datatypes at Once

Q1: You can't publish multiple message types to a single topic. You could, however, publish each of these message types

2018-12-10 09:29:36 -0500 commented answer Publishing Various Datatypes at Once

Updated my answer

2018-12-10 09:29:29 -0500 edited answer Publishing Various Datatypes at Once

Q1: You can't publish multiple message types to a single topic. You could, however, publish each of these message types

2018-12-10 09:19:11 -0500 commented question robot_localization: "Global EKF" without absolute pose information

Can you post your launch file? Also confirm that the "odom_raw" frame id in your odom message is a typo (or that you are

2018-12-10 08:06:03 -0500 answered a question Publishing Various Datatypes at Once

Q1: You can't publish multiple message types to a single topic. You could, however, publish each of these message types

2018-12-10 07:57:31 -0500 commented question robot_localization: "Global EKF" without absolute pose information

If you aren't providing your 'global ekf' with an absolute source of positioning (i.e., a pose estimate of base_link in

2018-11-01 20:31:23 -0500 commented question How can I display map by using bag files that saved when I do SLAM?

When you say "it was not working", can you elaborate on what isn't working? Do you have an error message you can show?

2018-10-26 08:33:34 -0500 answered a question Arrows are in a wrong direction when showing odometry/filtered

When I view odometry/filtered in RVIZ in the odom frame the arrows don't point to direction of movement,but per

2018-10-25 19:26:38 -0500 commented question Why does the Turtlebot 2 rotates toward the desired goal?

Not entirely clear what you're saying. Can you either post a picture or give a detailed description of the observed beha

2018-10-25 19:22:51 -0500 commented question Robot does not move in rviz

Is the local planner giving you any warnings? Have you tried running it with the default local / global planner paramete

2018-10-25 19:19:22 -0500 commented question How to check if there is problem in odometry?

Can you provide more information on what packages / configurations you're using?

2018-10-25 19:18:21 -0500 commented question some problem with global localizaton using stage simulation

Can you add more info on what you're trying to do / what you setup is? Are you using robot_localization? If you are, the

2018-10-25 19:13:00 -0500 commented question Good topic for my thesis

Have you talked to your supervisor?

2018-10-25 19:09:32 -0500 commented question Pointcloud to Laserscan on Simulated Jackal UGV w/ VLP-16

Other than the timing issues that looks like what I would expect from move_base. Have you tried removing some of the com

2018-10-25 18:56:33 -0500 commented question Arrows are in a wrong direction when showing odometry/filtered

Sounds like you haven't set it up properly - if you add more information (screenshots, your r_l config file, and example

2018-10-22 05:48:50 -0500 received badge  Good Answer (source)
2018-10-07 18:00:03 -0500 answered a question Any good example for ros_control of diff drive robot

Clearpath robots also use diff drive if you want to compare with PAL.

2018-10-06 11:11:56 -0500 commented question How can I know if robots are seeing each other?

If you just want to know the direction they're facing then orientation is correct (keep it mind it is in quaternion form

2018-09-07 19:50:58 -0500 commented question robot_localization covariance grows too big

Can you provide more details on what your problem is? I.e., what behavior do you expect and what are you seeing?

2018-09-07 19:50:16 -0500 commented question robot_localization covariance grows too big

Covariance of what? What is the problem?

2018-09-07 19:49:50 -0500 commented answer how to get wheel encoder data on HuskyA200

Unfortunately I'm not super familiar with the husky hardware interface, you may have to dig into the driver to figure it

2018-09-01 11:03:54 -0500 answered a question how to get wheel encoder data on HuskyA200

Answer will depend on what exactly you mean by "implement odometry pose estimation". If you want to go from raw wheel

2018-08-12 15:44:34 -0500 commented question How to make move_base more stable?

What local planner are you using? Have you tried tuning the parameters of your local planner?

2018-08-11 19:10:48 -0500 commented answer Problem with ROS Navigation Package (IMU GPS)

Can you record & upload a bag file? Would make it easier to troubleshoot.

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2018-08-10 08:13:10 -0500 commented answer IMU orientation mismatch with RVIZ

The UM7 IMU is reporting the orientation of the imu_link frame in some world fixed frame (e.g., ENU / NED). So regardles

2018-08-10 08:07:42 -0500 commented question Building ROS Navigation from source on Kinetic results in hang

I remember having this problem (hanging at 99-100%) awhile ago on an old T440 laptop (16.04). Don't think it prevented m

2018-08-09 20:47:57 -0500 commented answer Problem with ROS Navigation Package (IMU GPS)

navsat_transform_node only needs one imu message to initiate the utm->map frame TF, so it could be dropping the conne

2018-08-08 19:11:18 -0500 answered a question jackal_cartographer_navigation lunacy! robot goes INSANE when given 2D nav goal

Generic troubleshooting advice would be to simplify the system and then systematically add complexity when you're confid

2018-08-08 19:03:16 -0500 answered a question Can i Use navigation stack if my robot does not have any laser or kinect type camera

The navigation stack works perfectly fine without a laser. The main reason you may want to use a laser for navigation (a

2018-08-08 18:50:17 -0500 commented answer Problem with ROS Navigation Package (IMU GPS)

For your IMU, the only valid rows to fuse are [2,4,5] which correspond to roll-pitch-yaw, roll dot-pitch dot-yaw dot, an

2018-08-08 18:49:34 -0500 commented answer Problem with ROS Navigation Package (IMU GPS)

The statement Tom made "The odometry input to...output (it defaults to odometry/filtered)." is saying that the default i

2018-08-08 18:48:54 -0500 commented answer Problem with ROS Navigation Package (IMU GPS)

The statement Tom made "The odometry input to...output (it defaults to odometry/filtered)." is saying that the default o

2018-08-08 18:46:04 -0500 commented answer Problem with ROS Navigation Package (IMU GPS)

For your IMU, the only valid rows to fuse are [2,4,5] which correspond to roll-pitch-yaw, roll dot-pitch dot-yaw dot, an

2018-08-07 21:17:54 -0500 answered a question For frame [laser]: Frame [laser] does not exist

The line extraction node is trying to publish the markers in the laser frame, which doesn't exist because you probably h

2018-08-07 21:12:42 -0500 answered a question Problem with ROS Navigation Package (IMU GPS)

In your EKF node config, your gps odometry topic name looks incorrect. It should be the output coming from your navsat_t

2018-08-07 19:15:07 -0500 received badge  Associate Editor (source)
2018-08-07 19:15:07 -0500 edited answer Reliable IMUs for ROS

The "AHRS" orientation estimate that the UM7 calculates isn't great, but the IMU sensor data (i.e., acceleration, gyros,

2018-08-07 19:14:51 -0500 commented answer Reliable IMUs for ROS

Updated my answer with response

2018-08-07 19:14:16 -0500 edited answer Reliable IMUs for ROS

The "AHRS" orientation estimate that the UM7 calculates isn't great, but the IMU sensor data (i.e., acceleration, gyros,