Holybro pix32 (FMUv2)

:::warning PX4 does not manufacture this (or any) autopilot. Contact the manufacturer for hardware support or compliance issues. :::

The Holybro® pix32 autopilot (also known as "Pixhawk 2", and formerly as HKPilot32) is based on the Pixhawk®-project FMUv2 open hardware design. This board is based on hardware version Pixhawk 2.4.6. It runs the PX4 flight stack on the NuttX OS.

pix32

As a CC-BY-SA 3.0 licensed Open Hardware design, schematics and design files should be available here.

:::tip The Holybro pix32 is software compatible with the 3DR Pixhawk 1. It is not connector compatible, but is otherwise physically very similar to the 3DR Pixhawk or mRo Pixhawk. :::

:::note This flight controller is manufacturer supported. :::

Key Features

• Main System-on-Chip: STM32F427

  • CPU: 32-bit STM32F427 Cortex® M4 core with FPU

  • RAM: 168 MHz/256 KB

  • Flash: 2 MB

• Failsafe System-on-Chip: STM32F103

• Sensors:

  • ST Micro L3GD20 3-axis 16-bit gyroscope

  • ST Micro LSM303D 3-axis 14-bit accelerometer / magnetometer

  • Invensense® MPU 6000 3-axis accelerometer/gyroscope

  • MEAS MS5611 barometer

• Dimensions/Weight

  • Size: 81x44x15mm

  • Weight: 33.1g

• GPS: u-blox® super precision Neo-7M with compass

• Input Voltage: 210s (7.437V)

Connectivity

• 1x I2C

• 2x CAN

• 3.3 and 6.6V ADC inputs

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

• Spektrum DSM / DSM2 / DSM-X® Satellite compatible input up to DX8 (DX9 and above not supported)

• Futaba® S.BUS compatible input and output

• PPM sum signal

• RSSI (PWM or voltage) input

• SPI

• External microUSB port

• Molex PicoBlade connectors

Where to Buy

shop.holybro.com

Accessories

• Digital airspeed sensor
• Hobbyking® Wifi Telemetry
• HolyBro SiK Telemetry Radio (EU 433 MHz, US 915 MHz)

Building Firmware

:::tip Most users will not need to build this firmware! It is pre-built and automatically installed by QGroundControl when appropriate hardware is connected. :::

To build PX4 for this target:

make px4_fmu-v2_default

Debug Port

See 3DR Pixhawk 1 > Debug Ports.

Pinouts and Schematics

The board is based on the Pixhawk project FMUv2 open hardware design.

• FMUv2 + IOv2 schematic -- Schematic and layout

:::note As a CC-BY-SA 3.0 licensed Open Hardware design, all schematics and design files are available. :::

Serial Port Mapping

UART	Device	Port
UART1	/dev/ttyS0	IO debug
USART2	/dev/ttyS1	TELEM1 (flow control)
USART3	/dev/ttyS2	TELEM2 (flow control)
UART4
UART7	CONSOLE
UART8	SERIAL4