I have still some problems with the
erlecopter_hover_qlearn.py example under Ubuntu 18.04 with ROS Melodic / Gazebo 9. I know this is not the recommended version but at least i get it running without errors and can communicate via mavros.
But it seems that the erlecopter_spawn.launch doesn't fit anymore, i get the connection with mavros but gazebo shows nothing, just empty...
My question is, how difficult is it to swap the erle-copter model (with worldfile) against an working model for this version (maybe the arducopter-iris model , which is in .sdf format)?
Thanks in advance!