Action Feedback is not publishing at 1 Hz

[bayodesegun]

Hi @nrjbs87,

Thanks for the feedback.

I’ve just reset your quiz score and you can try again!

I think the problem of the drone not “obeying” the commands sometimes might be happening because the associated publishers might not be ready to receive commands (no connection to the publisher) when the commands were issued.

Before submitting the quiz again, please check the following post to see how waiting for a publisher connection is done. (PS: the post is not specifically about this, but it contains the trick to do this. I will write a separate post for this later).

How to stop your robot when ROS is shutting down

You might already know that ROS topics operate in “obey the last command” mode when working with robots in Gazebo simulations. In other words, the robot continues to execute the last message published to a given topic, even after you stop publishing the message. What this means, for example, is that if you publish a Twist message to move your robot and then shut down the ROS system, the robot continues moving. But this is not always desirable, so how do you ensure the robot stops when the ROS s…

Kindly let us know how it goes before submitting the quiz again.