20. Turtlesim Comms: Echo a Topic
Turtlesim Comms: Echo Messages
Turtlesim Comms: Echo Messages on a Topic
Sometimes it may be useful to look at a topic’s published messages in real time. To do so, we can use the command
rostopic echo
. Let’s take a look at the
/turtle1/cmd_vel
topic.
$ rostopic echo /turtle1/cmd_vel
If we then command the turtle to move from the
turtle_teleop_key
window, we will be able to see the output message in real-time.