Matthew Russell

Which version of Python are you using? I think I was able to use `python3-fann2` with Python 3.5 but needed to install FANN2 from source when using Python 3.7.

Might vary by AP configuration, but make sure you have told the AP to start sending messages. For example, to get global position data @ 1 Hz you might need...

*Disclaimer: I've only been using the ArduCopter simulator, so not sure if the PX4 has any big differences.* @JayanthAmmapalli MAVROS uses MAVLink to talk to the AP. The MAVROS documentation...

For more info about the topics and messages MAVROS uses, check the [ROS documentation for MAVROS](https://wiki.ros.org/mavros). It seems to be mostly correct. This has definitions for the `~cmd/takeoff` and `~cmd/land`...