Pixhawk Hardware

Pixhawk is the standard microcontroller platform for the PX4 flight stack. It runs the PX4 Middleware on the NuttX OS. As a CC-BY-SA 3.0 licensed Open Hardware design, all schematics and design files are available. The Pixfalcon is a smaller version of Pixhawk for FPV racers and similar platforms. For drones requiring high processing performance or a camera interface the Snapdragon Flight might be a more optimal fit.

Quick Summary

• Main System-on-Chip: STM32F427
  • CPU: 180 MHz ARM Cortex M4 with single-precision FPU
  • RAM: 256 KB SRAM (L1)
• Failsafe System-on-Chip: STM32F100
  • CPU: 24 MHz ARM Cortex M3
  • RAM: 8 KB SRAM
• Wifi: ESP8266 external
• GPS: U-Blox 7/8 (Hobbyking) / U-Blox 6 (3D Robotics)
• Optical flow: PX4 Flow unit
• Availability:
  • Hobbyking EU version (433 MHz)
  • Hobbyking US version (915 MHz)
  • 3D Robotics Store (GPS and telemetry not bundled)
• Accessories:
  • Digital airspeed sensor
  • Hobbyking Wifi Telemetry
  • Hobbyking OSD + US Telemetry (915 MHz)
  • Hobbyking OSD + EU Telemetry (433 MHz)

Connectivity

• 1x I2C
• 1x CAN (2x optional)
• 1x ADC
• 4x UART (2x with flow control)
• 1x Console
• 8x PWM with manual override
• 6x PWM / GPIO / PWM input
• S.BUS / PPM / Spektrum input
• S.BUS output

Pinouts and Schematics

The board is documented in detailed on the Pixhawk project website.