Almost exactly one year after the first PX4 announcement, we would like to introduce our newest member of the family, Pixhawk! For those familiar with the existing PX4 electronics, it is the all-in-one board combining PX4FMU + PX4IO, combined with a processor and sensor update and a number of new features. The current board revisions will however remain in full service and active development and are fully compatible. Pixhawk is designed for improved ease of use and reliability while offering unprecedented safety features compared to existing solutions.

Pixhawk is designed by the PX4 open hardware project and manufactured by 3D Robotics. It features the latest processor and sensor technology from ST Microelectronics which delivers incredible performance and reliability at low price points.

The flexible PX4 middleware running on the NuttX Real-Time Operating System brings multithreading and the convenience of a Unix / Linux like programming environment to the open source autopilot domain, while the custom PX4 driver layer ensures tight timing. These facilities and additional headroom on RAM and flash will allow Pixhawk the addition of completely new functionalities like programmatic scripting of autopilot operations.

The PX4 project offers its own complete flight control stack, and projects such as APM:Copter and APM:Plane have ported their software to run as flight control applications. This allows existing APM users to seamlessly transition to the new Pixhawk hardware and lowers the barriers to entry for new users to participate in the exciting world of autonomous vehicles.

The flagship Pixhawk module will be accompanied by new peripheral options, including a digital airspeed sensor, support for an external multi-color LED indicator and an external magnetometer. All peripherals are automatically detected and configured.


  • 32 bit ARM Cortex M4 Processor running NuttX RTOS

  • 14 PWM / Servo outputs (8 with failsafe and manual override, 6 auxiliary,

    high-power compatible)

  • Abundant connectivity options for additional peripherals (UART, I2C, CAN)

  • Integrated backup system for in-flight recovery and manual override with

    dedicated processor and stand-alone power supply

  • Backup system integrates mixing, providing consistent autopilot and manual

    override mixing modes

  • Redundant power supply inputs and automatic failover

  • External safety switch

  • Multicolor LED main visual indicator

  • High-power, multi-tone piezo audio indicator

  • microSD card for long-time high-rate logging

  • 32bit STM32F427 Cortex M4 core with FPU

  • 168 MHz

  • 256 KB RAM

  • 2 MB Flash

  • 32 bit STM32F103 failsafe co-processor

  • ST Micro L3GD20H 16 bit gyroscope

  • ST Micro LSM303D 14 bit accelerometer / magnetometer

  • MEAS MS5611 barometer

  • 5x UART (serial ports), one high-power capable, 2x with HW flow control

  • 2xCAN

  • Spektrum DSM / DSM2 / DSM-X® Satellite compatible input

  • Futaba S.BUS® compatible input and output

  • PPM sum signal

  • RSSI (PWM or voltage) input

  • I2C®

  • SPI

  • 3.3 and 6.6V ADC inputs

  • External microUSB port

Power System and Protection

  • Ideal diode controller with automatic failover

  • Servo rail high-power (up to 10V) and high-current ready (10A +)

  • All peripheral outputs over-current protected, all inputs ESD protected

  • Monitoring of system and servo rails, over current status monitoring of peripherals


  • Weight: 38g (1.31oz)

  • Width: 50mm (1.96")

  • Thickness: 15.5mm (.613")

  • Length: 81.5mm (3.21") 


This announcement is a service to our users and developers to allow them to plan their hardware roadmaps in time, and to show what we're currently working on. The board will not be immediately available, but 3D Robotics is taking pre-orders for Pixhawk now, and will begin shipping in late October [Update 11/11: the current expected ship date is late Nov]. The price is $199.99.

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  • Developer

    @Veikko You can run APM:Plane, APM:Copter, APM:Rover on it, and those are all supported with Pixhawk with Mission Planner and with the new cross-platform GCS options that will be available soon.

  • Developer

    @Bill: That's almost correct, it misses an important part: The Pixhawk platform runs NuttX, and on top the PX4 middleware. Drivers, mixers, RC input handling, bootloaders, so quite a bit of flight relevant parts. APM runs on top of PX4 (and not only on top of NuttX). The differences are only at the flight control level, where users have the choice between the PX4 flight stack and APM. The lower layers and the IO backup / failsafe processor is in all cases running the PX4 middleware stack.

  • Developer

    There Pixhawk is an autopilot platform (it runs an embedded OS called NuttX). The software that currently runs on the APM (APM:Plane, APM:Copter, APM:Rover) has been ported to run on this NuttX OS. This means you get the benefits of the many thousands of hours of flight time that APM code has been flown, with the same large diydrones.com community supporting it. see http://ardupilot.com

    There is also the ETH Zurich Autopilot that has been developed there, that also runs on the platform see https://pixhawk.ethz.ch/px4/roadmap

  • Moderator

    Who is primarily working on the code/software for this unit?

  • want to look at inside design

  • New peripherals have been presented in a follow up post:


  • Thanks Lorenz, I ordered one. 

  • Developer

    @Tweeter: The Taranis has S.Bus output, which this PX4 module and even the "old" PX4IO both decode. So yes, its fully compatible and you get digital signals and even a signal lost indication.

  • Hey Gary,

    Will the FR Sky Taranis for sure work with the PX4? I'm new to this and trying to decode the documentation, but I'm not sure if this receiver has the features the PX4 needs. 


  • Pixhawk is designed by the PX4 open hardware project and manufactured by 3D Robotics.

    this sounds more like the opensource is no longer opensource on their hardware. LMAO

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