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2019-04-28 14:39:04 -0600 received badge  Good Answer (source)
2019-02-13 20:50:33 -0600 marked best answer xbee communication for Groovy on Ubuntu 12.04

I am trying to use an Xbee series 1 pro to communicate from an arduino to a laptop. I was planning on using the rosserial_xbee but the stack was removed from the metapackage. Is there anyway to use the xbee for communication?

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2017-11-04 02:13:35 -0600 marked best answer rosserial error when publishing IMU data

I get the following error when I try to use an Arduino to publish data from an IMU:

balto@T510:~$ rosrun rosserial_python serial_node.py /dev/ttyUSB0
    [INFO] [WallTime: 1364421432.288265] ROS Serial Python Node
    [INFO] [WallTime: 1364421432.288485] Connecting to /dev/ttyUSB0 at 57600 baud
    Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
    Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
    Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
    Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
    Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
    Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
    Exception AttributeError: AttributeError("'_DummyThread' object has no attribute '_Thread__block'",) in <module 'threading' from '/usr/lib/python2.7/threading.pyc'> ignored
    [INFO] [WallTime: 1364421434.987086] Note: publish buffer size is 512 bytes
    [INFO] [WallTime: 1364421434.987635] Setup publisher on /imu/data [sensor_msgs/Imu]
    Traceback (most recent call last):
      File "/home/balto/catkin_ws/install/lib/rosserial_python/serial_node.py", line 79, in <module>
        client.run()
      File "/home/balto/catkin_ws/install/lib/python2.7/dist-packages/rosserial_python/SerialClient.py", line 393, in run
        self.callbacks[topic_id](msg)
      File "/home/balto/catkin_ws/install/lib/python2.7/dist-packages/rosserial_python/SerialClient.py", line 99, in handlePacket
        m.deserialize(data)
      File "/opt/ros/groovy/lib/python2.7/dist-packages/sensor_msgs/msg/_Imu.py", line 196, in deserialize
        raise genpy.DeserializationError(e) #most likely buffer underfill
    genpy.message.DeserializationError: unpack requires a string argument of length 72

Any ideas what would cause this error? Thank you in advanced.

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2017-09-12 00:49:16 -0600 commented question Recommendations mobile manipulator for university

Ridgeback and Husky have been integrated with various manipulators such as UR, KUKA, Kinova, Baxter and Fanuc: https://w

2017-09-04 11:14:51 -0600 received badge  Good Answer (source)
2017-08-25 09:44:46 -0600 commented question Irregular and slow IMU rate measurement

The hardware id is the firmware version.

2017-08-25 09:30:05 -0600 edited answer Husky simulator for ROS-Lunar?

The Husky is currently only supported on Indigo. Kinetic is planned whereas, lunar is not but should work if installed f

2017-08-25 09:17:58 -0600 answered a question Husky simulator for ROS-Lunar?

The Husky is currently only support on Indigo. Kinetic is planned whereas, lunar is not.

2017-08-25 09:15:51 -0600 commented question Irregular and slow IMU rate measurement

The measured rate should be 50Hz. Which version of the Jackal's firmware is on your robot? (It can be frond on the stat

2017-08-02 13:32:45 -0600 commented question navigation stack with stepper motors

Copy of http://answers.ros.org/question/267895/how-to-use-stepper-motor-for-differential-drive/

2017-07-17 21:35:19 -0600 commented question Cannot connect to the ROS master

Have you checked this out?

2017-07-13 20:53:13 -0600 commented question Gmapping Husky no map received

Can you ping both ways by hostname?

2017-06-22 16:00:38 -0600 commented answer How can I get a Clearpath Jackal to receive HDL-32 data?

Also, try switching which port is used.

2017-06-22 16:00:21 -0600 commented answer How can I get a Clearpath Jackal to receive HDL-32 data?

Contacting us would be best. As a note, ethernet ports that are bridged shouldn't get IP address. However, the way the

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2017-04-04 12:10:50 -0600 commented question Subscribe cmd_vel with Arduino

Do you have feedback? PWM isn't velocity control.

2017-04-04 06:13:06 -0600 commented answer Getting imu_data from jackal in simulation

Hi rsmitha, can you mark the question as answered? Angular X is the robot rolling which both the Husky and Jackal cannot do. They are able to drive forward which is linear x and rotate which is angular z. Try to avoid posting comments as answers.

2017-03-27 20:37:05 -0600 answered a question Getting imu_data from jackal in simulation

The topic is imu/data not imu_data.

2017-03-08 09:56:00 -0600 commented answer What is the best way to connect an APM controller to ROS?

Would strongly advice against that, use mavros.

2017-03-04 11:28:31 -0600 commented question Errors while running a virtual husky

Are you running from source or debs?

2017-02-15 13:54:51 -0600 commented answer ROS Kinetic Husky Question

It will eventually.

2017-02-07 13:48:00 -0600 marked best answer rosserial error on Raspbian

I am trying to use rosserial on Raspbian using ROS Groovy. I am trying to run rosrun rosserial_python serial_node.py /dev/ttyACM0 but I get this error [ERROR] [WallTime: 1363226987.379253] Tried to publish before configured, topic id 125. I compile the code on an Ubuntu 12.04 laptop and can get it to run on the Ubuntu machine but as soon as I plug it into the Raspberry Pi, I get that error. Any ideas?

Thanks in advance.

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2017-02-06 21:43:37 -0600 answered a question how to communicate lynmotion ssc32 servo controller module with ROS(indigo)??
2017-02-06 21:29:53 -0600 commented answer Arduino /cmd_vel and /odom with Pololu motors w/ encoder

Here is an example I did a while ago

2017-02-06 21:27:21 -0600 answered a question ROS Kinetic Husky Question

Hi John,

We are currently working on kinetic release for the Husky, there is no ISO currently but rather a general Kinetic iso. In addition, there is a kinetic-devel that works minus the microstrain imu option. For kinetic, we made the husky a changes to the husky metapackakge layout so please blacklist desktop packages to avoid installing the desktop environment. We do hope to have a full release soon.

2016-10-26 10:26:12 -0600 edited answer ax2550 node fails to connect to ax2550?

Make sure you have dialout access. Try sudo chmod 766 /dev/YOURPORT. A colleague of mine had a similar issue.

2016-10-16 23:42:39 -0600 received badge  Nice Answer (source)
2016-10-14 12:13:16 -0600 commented question Openni launcher error

Did this turtlebot come with an Astra sensor?

2016-09-07 10:11:39 -0600 received badge  Great Answer (source)
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2016-08-24 12:46:25 -0600 commented question Problems with gmapping and Husky A200

This bug was fixed a while ago but never bloomed here. As for the nav goal, are just running gmapping or the gmpapping demo? move_base is used to move the robot.

2016-08-15 23:26:29 -0600 answered a question ROS Kinetic on Ubuntu Mate 16.04 ARMHF (Raspberry Pi 3)
2016-07-31 11:29:09 -0600 commented answer Jackal robot PS4 remote cannot pair using bluetooth with the robot?

Thanks for posting this Ashwin.

2016-07-24 21:03:25 -0600 commented question Jackal robot PS4 remote cannot pair using bluetooth with the robot?

Airuno2L, did you also get a PS4 controller?

2016-07-24 21:02:56 -0600 commented question Jackal robot PS4 remote cannot pair using bluetooth with the robot?

Ashwin, did you get a chance to try re-pairing it with ds4drv-pair?

2016-07-23 17:54:21 -0600 answered a question Jackal robot PS4 remote cannot pair using bluetooth with the robot?

Does the light flash when you press the PS button? If not, try charging the controller. The sixad is only for PS3 controllers and should not be installed for a Jackal using the PS3 controller. If you believe that it lost its paring you can run ds4drv-pair which should repair it. All controllers are paired and tested prior to shipping the Jackal.

2016-07-23 17:51:02 -0600 commented question Jackal robot PS4 remote cannot pair using bluetooth with the robot?

Did you receive it with a PS3 or PS4 controller?

2016-06-30 17:20:51 -0600 answered a question How to use Mocap_pose_estimate for sending Optitrach mocap pose data to fcu

It is a plugin so you have to load into mavros node using a yaml as done here.

2016-06-26 23:43:56 -0600 answered a question How to install ROS on Ubuntu 16 running on a Raspberry Pi

I had the same issue, I switched to the shadow-fix repositories and it fixed it.

2016-06-16 21:56:43 -0600 commented answer Automated rosbag on start up

I am aware however the target OS is trusty which still uses upstart.

2016-06-16 19:00:33 -0600 answered a question Automated rosbag on start up

You can easily do that with robot_upstart which starts a launch files on boot as a service.