Holybro pix32 Flight Controller
:::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.
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: 2~10s (7.4~37V)
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
Purchase
Accessories
- Digital airspeed sensor
- Hobbyking® Wifi Telemetry
- Telemetry Radio EU (433 MHz)
- Telemetry Radio USA (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 |