Hello, I am trying to understand how the ros::CallbackQueue is working in ROS. I have followed (https://gist.github.com/bgromov/e6f5eb142346b3c88e9f96bce17eee92) example. The custom call back in this example was not getting called and the it was not looping. The main was strucking at the sleep().

Can any one please explain me how can I will be able to call the custom callback.

Thanks and regards,

Murali krishna