px4-firmware/README.md

## PX4 Flight Core and PX4 Middleware ##

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This repository contains the [PX4 Flight Core](http://px4.io), with the main applications located in the src/modules directory. It also contains the PX4 Drone Platform, which contains drivers and middleware to run drones.

*   Official Website: http://px4.io
*   License: BSD 3-clause (see [LICENSE.md](https://github.com/PX4/Firmware/blob/master/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/firmware/downloads)
*   Releases
  * [Downloads](https://github.com/PX4/Firmware/releases)
*   Forum / 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)

Software in the Loop guide:
Use software in the loop [to get started with the codebase](https://pixhawk.org/dev/simulation/native_sitl).

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

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

This repository contains code supporting these boards:
  * [Snapdragon Flight](http://dev.px4.io/hardware-snapdragon.html)
  * FMUv1.x
  * FMUv2.x ([Pixhawk](http://dev.px4.io/hardware-pixhawk.html), Pixhawk 2 and [Pixfalcon](http://dev.px4.io/hardware-pixfalcon.html))
  * FMUv4.x (Pixhawk X and [Pixracer](http://dev.px4.io/hardware-pixracer.html))
  * AeroCore (v1 and v2)
  * STM32F4Discovery (basic support) [Tutorial](https://pixhawk.org/modules/stm32f4discovery)

## NuttShell (NSH) ##

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