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Fixhawk Specifications


Advanced 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 button for easy motor activation

Multicolor LED indicator

High-power, multi-tone piezo audio indicator

microSD card for long-time high-rate logging



32-bit STM32F427VIT6 Cortex M4 core with FPU 168 MHz/256 KB RAM/2 MB Flash

32 bit STM32F103C8T6 failsafe co-processor


ST Micro L3GD20 3-axis 16-bit gyroscope

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

Invensense MPU6000 3-axis accelerometer/gyroscope

MEAS MS5611-01BA03 barometer


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

2x CAN

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



3.3 and 6.6V ADC inputs

External microUSB port

Power System:

Ideal diode controller with automatic failover

Servo rail high-power (7 V) and high-current ready

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

Weight and Dimensions:

Dimension: 51.5mmx82x17mm
Weight: 40g

Fixhawk Photos:

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Fixhawk includes:

  • Fixhawk autopilot
  • MicroSD 4G x1 ?Mounted on Fixhawk?
  • SD Adapter
  • 30mm Buzzer
  • E-Switch Safety switch button
  • GPS/Radio Cable 300mm (Quantity 2)
  • OSD Cable 200mm
  • PPM/S.BUS. Receiver Cable 100mm
  • XT60 Power module

The flagship Fixhawk 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.

Note: Fixhawk gets RC input from a single cable to the receiver either via the PPM port, the Futaba S.BUS port, or Spektrum satellite receiver port.

If your RC receiver only has PWM output on separate channels then please order a PPM encoder board to use your PWM receiver with Fixhawk.

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Rctimer Fixhawk is 100% compatible with Pixhawk/PX4, an advanced autopilot system designed by the PX4 open-hardware project. It features advanced processor and sensor technology from ST Microelectronics® and a NuttX real-time operating system, delivering incredible performance, flexibility, and reliability for controlling any autonomous vehicle.

The benefits of the Fixhawk system include integrated multithreading, a Unix/Linux-like programming environment, completely new autopilot functions such as Lua scripting of missions and flight behavior, and a custom PX4 driver layer ensuring tight timing across all processes.

These advanced capabilities ensure that there are no limitations to your autonomous vehicle. Fixhawk allows existing APM and PX4 operators to seamlessly transition to this system and lowers the barriers to entry for new users to participate in the exciting world of autonomous vehicles.