Kenisvery

getting bebop navdata through rostopic?

1

Hi, How could i get the navigation data through the rostopic? I tried enter "rostopic echo bebop/states/ardrone3/PilotingState/AttitudeChanged" . However, i am getting an error message "ERROR: Cannot load message class...

I connected to the drone through the WIFI and open the application, then when i pressed the "connect to the drone" button. The window just got off. its like nothing...