<commit_before># PX4 Pro Drone Autopilot

[![Releases](https://img.shields.io/github/release/PX4/Firmware.svg)](https://github.com/PX4/Firmware/releases) [![DOI](https://zenodo.org/badge/22634/PX4/Firmware.svg)](https://zenodo.org/badge/latestdoi/22634/PX4/Firmware)

[![Build Status](http://ci.px4.io:8080/buildStatus/icon?job=Firmware/master)](http://ci.px4.io:8080/blue/organizations/jenkins/Firmware/activity) [![Coverity Scan](https://scan.coverity.com/projects/3966/badge.svg?flat=1)](https://scan.coverity.com/projects/3966?tab=overview)

[![Slack](https://px4-slack.herokuapp.com/badge.svg)](http://slack.px4.io)

This repository holds the [PX4 Pro](http://px4.io) flight control solution for drones, with the main applications located in the [src/modules](https://github.com/PX4/Firmware/tree/master/src/modules) directory. It also contains the PX4 Drone Middleware Platform, which provides drivers and middleware to run drones.

* Official Website: http://px4.io (License: BSD 3-clause, [LICENSE](https://github.com/PX4/Firmware/blob/master/LICENSE))
* [Supported airframes](https://docs.px4.io/en/airframes/airframe_reference.html) ([portfolio](http://px4.io/#airframes)):
  * [Multicopters](https://docs.px4.io/en/airframes/airframe_reference.html#copter)
  * [Fixed wing](https://docs.px4.io/en/airframes/airframe_reference.html#plane)
  * [VTOL](https://docs.px4.io/en/airframes/airframe_reference.html#vtol)
  * many more experimental types (Rovers, Blimps, Boats, Submarines, etc)
* Releases: [Downloads](https://github.com/PX4/Firmware/releases)


## PX4 Users

The [PX4 User Guide](https://docs.px4.io/en/) explains how to assemble [supported vehicles](https://docs.px4.io/en/airframes/airframe_reference.html) and fly drones with PX4. 
See the [forum and chat](https://docs.px4.io/en/#support) if you need help!


## PX4 Developers

This [Developer Guide](https://dev.px4.io/) is for software developers who want to modify the flight stack and middleware (e.g. to add new flight modes), hardware integrators who want to support new flight controller boards and peripherals, any anyone who wants to get PX4 working on a new (unsupported) airframe/vehicle.

Developers should read the [Guide for Contributions](https://dev.px4.io/en/contribute/).
See the [forum and chat](https://dev.px4.io/en/#support) if you need help!<commit_msg>Main Readme: Spelling correction<commit_after># PX4 Pro Drone Autopilot

[![Releases](https://img.shields.io/github/release/PX4/Firmware.svg)](https://github.com/PX4/Firmware/releases) [![DOI](https://zenodo.org/badge/22634/PX4/Firmware.svg)](https://zenodo.org/badge/latestdoi/22634/PX4/Firmware)

[![Build Status](http://ci.px4.io:8080/buildStatus/icon?job=Firmware/master)](http://ci.px4.io:8080/blue/organizations/jenkins/Firmware/activity) [![Coverity Scan](https://scan.coverity.com/projects/3966/badge.svg?flat=1)](https://scan.coverity.com/projects/3966?tab=overview)

[![Slack](https://px4-slack.herokuapp.com/badge.svg)](http://slack.px4.io)

This repository holds the [PX4 Pro](http://px4.io) flight control solution for drones, with the main applications located in the [src/modules](https://github.com/PX4/Firmware/tree/master/src/modules) directory. It also contains the PX4 Drone Middleware Platform, which provides drivers and middleware to run drones.

* Official Website: http://px4.io (License: BSD 3-clause, [LICENSE](https://github.com/PX4/Firmware/blob/master/LICENSE))
* [Supported airframes](https://docs.px4.io/en/airframes/airframe_reference.html) ([portfolio](http://px4.io/#airframes)):
  * [Multicopters](https://docs.px4.io/en/airframes/airframe_reference.html#copter)
  * [Fixed wing](https://docs.px4.io/en/airframes/airframe_reference.html#plane)
  * [VTOL](https://docs.px4.io/en/airframes/airframe_reference.html#vtol)
  * many more experimental types (Rovers, Blimps, Boats, Submarines, etc)
* Releases: [Downloads](https://github.com/PX4/Firmware/releases)


## PX4 Users

The [PX4 User Guide](https://docs.px4.io/en/) explains how to assemble [supported vehicles](https://docs.px4.io/en/airframes/airframe_reference.html) and fly drones with PX4. 
See the [forum and chat](https://docs.px4.io/en/#support) if you need help!


## PX4 Developers

This [Developer Guide](https://dev.px4.io/) is for software developers who want to modify the flight stack and middleware (e.g. to add new flight modes), hardware integrators who want to support new flight controller boards and peripherals, and anyone who wants to get PX4 working on a new (unsupported) airframe/vehicle.

Developers should read the [Guide for Contributions](https://dev.px4.io/en/contribute/).
See the [forum and chat](https://dev.px4.io/en/#support) if you need help!
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