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2019-12-31 08:07:11 -0600 answered a question Hi, I want to use the message filter in this example , I tried to register callback from a class member function as in the following code:

Are you sure that your CMakeLists.txt and package.xml are properly configured? I've tried compiling your code and it we

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2019-12-31 07:18:34 -0600 answered a question How does subscriber works?

ROS creates separate thread for each subscriber. That is why you are getting pose values updated. You can find more deta

2019-12-31 07:18:34 -0600 received badge  Rapid Responder (source)
2019-04-15 14:25:37 -0600 answered a question How to get value from a subscribed topic in ros in python

Hey, The code you provided doesn't work, because you miss the comma after first String. Other than that it's completely

2017-03-16 12:27:51 -0600 answered a question I can't find a differential drive package using rplidar with dc motors and no encoders

You can use differential_package created by Jon Stephan. As far as I remember It works fine without encoders. Here you can find fork repository: https://github.com/vcwu/ros-differential-drive. Just need to remap /twist to /cmd_vel and it should work fine.