path: root/README.md

## PX4 Flight Control Stack and Middleware ##

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*   Official Website: http://px4.io
*   License: BSD 3-clause (see LICENSE.md)
*   Supported airframes (more experimental are supported):
  * [Multicopters](http://px4.io/platforms/multicopters/start)
  * [Fixed wing](http://px4.io/platforms/planes/start)
  * [VTOL](http://px4.io/platforms/vtol/start)
*   Binaries (always up-to-date from master):
  * [Downloads](http://px4.io/downloads)
*   Mailing list: [Google Groups](http://groups.google.com/group/px4users)

### Users ###

Please refer to the [user documentation](https://pixhawk.org/users/start) for flying drones with the PX4 flight stack.

### Developers ###

Contributing guide:
  * [CONTRIBUTING.md](https://github.com/PX4/Firmware/blob/master/CONTRIBUTING.md)
  * [PX4 Contribution Guide](http://px4.io/dev/contributing)

Developer guide:
http://px4.io/dev/

Testing guide:
http://px4.io/dev/unit_tests

This repository contains code supporting these boards:
  * FMUv1.x
  * FMUv2.x
  * AeroCore (v1 and v2)

## NuttShell (NSH) ##

NSH usage documentation:
http://px4.io/users/serial_connection