Product overview
The Rctimer Fixhawk/3DR Pixhawk 32bit Flight Controller is an autopilot module for autonomous vehicle control. Its hardware combines a 32-bit STM32F427VIT6 Cortex M4 processor with FPU and a separate STM32F103C8T6 failsafe co-processor. The main processor runs at 168 MHz with 256 KB RAM and 2 MB Flash. Onboard sensing comprises an ST Micro L3GD20 3-axis 16-bit gyroscope and an LSM303D 3-axis 14-bit accelerometer/magnetometer. NuttX RTOS provides the software foundation, alongside multithreading, a Unix/Linux-like programming environment, Lua scripting for missions and flight behavior, and a custom PX4 driver layer.
Integration provisions include 14 PWM/servo outputs: eight with failsafe and manual override, plus six high-power-compatible auxiliary outputs. UART, I2C and CAN provide peripheral connections. The backup architecture combines a dedicated processor, stand-alone power supply and integrated mixing for in-flight recovery and manual override. Redundant power inputs support automatic failover. RC input uses a single receiver cable through PPM, Futaba S.BUS or a dedicated Spektrum satellite receiver port. A receiver without PPM output requires a PPM encoder board, making receiver output format a material integration constraint.
The supplied flight-controller package contains one Fixhawk autopilot, a mounted MicroSD 4G card, an SD adapter, a 30mm buzzer and an E-Switch safety switch button. Wiring comprises two 300mm GPS/Radio cables, one 200mm OSD cable and one 100mm PPM/S.BUS receiver cable. Features include microSD logging, a multicolor LED indicator and a high-power, multi-tone piezo audio indicator. Planned peripheral expansion includes a digital airspeed sensor, support for an external multicolor LED indicator and an external magnetometer, with automatic detection and configuration described for those peripherals.
Specifications
| Specification | Value & conditions |
|---|---|
| Product | Rctimer Fixhawk/3DR Pixhawk 32bit Flight Controller |
| Main processor | 32-bit STM32F427VIT6 Cortex M4 core with FPU |
| Processor speed and memory | 168 MHz; 256 KB RAM; 2 MB Flash |
| Failsafe co-processor | 32 bit STM32F103C8T6 |
| Gyroscope | ST Micro L3GD20 3-axis 16-bit gyroscope |
| Accelerometer and magnetometer | ST Micro LSM303D 3-axis 14-bit accelerometer / magnetometer |
| Operating system | NuttX RTOS |
| Software environment | Integrated multithreading, Unix/Linux-like programming environment, Lua scripting of missions and flight behavior, and a custom PX4 driver layer |
| PWM and servo outputs | 14 outputs: 8 with failsafe and manual override; 6 auxiliary, high-power compatible |
| Peripheral interfaces | UART, I2C and CAN |
| Recovery and override architecture | Integrated backup system for in-flight recovery and manual override, with dedicated processor and stand-alone power supply |
| Backup mixing | Integrated mixing for autopilot and manual override modes |
| Power redundancy | Redundant power supply inputs with automatic failover |
| Motor activation control | External safety button for motor activation |
| Visual indicator | Multicolor LED indicator |
| Audio indicator | High-power, multi-tone piezo audio indicator |
| Logging storage | MicroSD card for long-time high-rate logging |
| RC input | PPM port, Futaba S.BUS port or dedicated Spektrum satellite receiver portSingle-cable connection to the receiver. |
| Receiver integration limitation | A PPM encoder board is requiredReceiver does not support PPM output. |
| Planned peripheral expansion | Planned peripheral options include a digital airspeed sensor, support for an external multicolor LED indicator and an external magnetometer, with automatic detection and configuration described for these peripherals |
| Autopilot module | Fixhawk autopilot ×1Included equipment. |
| Memory card | MicroSD 4G ×1Included equipment; mounted on Fixhawk. |
| Card adapter | SD adapter ×1Included equipment. |
| Buzzer | 30mm buzzer ×1Included equipment. |
| Safety switch | E-Switch safety switch button ×1Included equipment. |
| GPS and radio cables | GPS/Radio cable, 300mm ×2Included equipment. |
| OSD cable | OSD cable, 200mm ×1Included equipment. |
| Receiver cable | PPM/S.BUS receiver cable, 100mm ×1Included equipment. |
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