Mavros mavsys mode -c OFFBOARD timed out

Hi there,

When I followed the example of “Ground Rover with Mavros” at, I can get response of rostopic echo /mavros/state.

Then after I sent “rosrun mavros mavsys mode -c OFFBOARD”, the “roslaunch mavros px4.launch” window showed:
[ WARN] [1471701687.767654645]: CMD: Unexpected command 176, result 1

And the “rosrun mavros mavsys mode -c OFFBOARD” window showed “Timed out!”.

What happened and how should I fix this problem?

Many thanks!

Have you solved this problem?
I am hitting the same problem now!!!

@saryee have you found the solution

I am still having this issue in 2022. Any help would be much appreciated!