Maarten's profile - activity

If you want to wait for the response of the callback function, you can use a service, but I agree with @gvdhoorn that th

@akosodry I missed your visual odometry question. Visual odometry can more or less replace an encoder input (or can be u

As per @akosodry 's request, a summary of our comments discussion as an answer: I can't help you with the urdf, but the

I think you only need some filtering on the GPS position and the magnetometer orientation (I don't think the acceleratio

If you want to estimate both the map->odom and the odom->base_link transformations, you need two robot_localizatio

If I understand it right, you have a mobile base that drives around randomly (well, not randomly, but you don't know any

I can't help you with the urdf, but the odom frame between the map (or world) and the base_link frame gives you both a c

I think so. gmapping and rtabmap are, but the only way to know for sure is to check all of them on the ROS website (http

The LIBUSB_ERROR_ACCESS error message on libusb_open makes me think the driver found the device, but the user running RO

Why not start with the Kinetic Kame distribution and switch when you need to? Or if you just start learning ROS, you can

Just create your own message file (as detailed in the Wiki). In your case, something like time timestamp int32 left_t

I also have ## OpenCV find_package(OpenCV REQUIRED) include_directories(${OpenCV_INCLUDE_DIRS}) in my CMakeLists.txt.

I also have ` OpenCV find_package(OpenCV REQUIRED) include_directories(${OpenCV_INCLUDE_DIRS}) in my CMakeLists.txt.

I also have ` OpenCV find_package(OpenCV REQUIRED) include_directories(${OpenCV_INCLUDE_DIRS}) in my CMakeLists.txt.

I also have ``` OpenCV find_package(OpenCV REQUIRED) include_directories(${OpenCV_INCLUDE_DIRS}) `` in my CMakeLists.t

If you can't get it to work, please post your CMakeLists.txt too.

My nodes using OpenCV have ${OpenCV_LIBS} in their target_link_libraries definition. I don't know what other OpenCV func

Maybe it is interesting for future visitors to tell what the problem was.

I use the parameter server for most configuration variables of my applications. The documentation mentions that it's too

Makes sense. In that case, I would use the callbacks to update the state, and perform the necessary actions using either

Can you post the full CMakeLists.txt and tell us which files are actually present (e.g. the output of the tree command)?

Anyway, a possible approach is to implement the state function in a separate function. Every input is stored and at the

Why are setSpeed, setAcceleration and Run services if you have to wait for an acknowledge using a subscriber? Did you wr

Not sure if there is a tool included or available, but if not, the rosbag API can help you to write a little tool in Pyt

(that's why I put everything in comments and not as an answer: this is in my opinion the best answer for your question a

this is probably not the best method. If possible, it's probably better to listen to the certain ROS callback, only call

I suppose it should be possible to force your idea using threads and, if necessary, multiple callback queues (See Callba

Does the file ros_tutorials_topic/src/ros_tutorials_topic_node.cpp (relative to your catkin workspace) actually exists?

ROS Indigo Igloo is mainly targeted at Ubuntu 14.04. It's probably possible to install it from source on Ubuntu 16.04, b

The error is not Invoking "make -j4 -l4" failed but /bin/sh: 1: pyrcc5: not found. Is pyrcc5 installed? (in Ubuntu, you

To prevent that, you'll need to tag the messages before sending them. Or you can test that in such cases, the new comman

Could be an IPv6 problem. Does this Unix & Linux question and answer help?

It should be quite easy to rewrite the bag using the rosbag Python API. The wiki gives you more information and some exa

You can either create a new bag with only the messages in the time intervals you want to keep, or you can write a custom

It should be quite easy to rewrite the bag using the rosbag Python API. The wiki gives you more information and some exa

Stamping allows you to identify delayed messages, but doesn't stop the robot if you lose the connection. For that use @a

Your rostopic pub command seems to be correct (it sends "data: 'z'", not just "z" as tested in your if). We can't say mu

Your rostopic pub command seems to be correct. We can't say much about your code sample, since it doesn't include the fu

Did you do anything as root (or using sudo) in this workspace? What are the permissions on /home/user/catkin_ws/build?

I installed the ros-kinetic-pcl-ros package, which depends on libpcl-dev and other libpcl packages. I think you have a p

On my system, your CMakeLists.txt and example.cpp build fine as you posted them (Ubuntu 16.04 LTS, ROS Kinetic Kame, all