FlyingRC
F4Wing Mini MK1 F405 Fixed-Wing Flight Controller
An ultra-small fixed-wing autopilot board. It is the central controller for a small plane: it reads sensors, runs ArduPilot/INAV-style flight firmware, outputs servo/PWM control, and provides connectors for receiver and HD video equipment.
BMI270
Current retail configuration: BMI270. Earlier ICM versions are discontinued; their documentation remains available for existing owners. The ICM42688 parameter image is retained only for earlier hardware; use the BMI270 revision information for current units.
Current pricing and inventory are shown in the store.
Product overview
- STM32F405 fixed-wing autopilot controller
- 27.9 x 20.3 x 11.2 mm board size
- 6 PWM outputs, 3 UARTs, SBUS, I2C, USB-C, and HD VTX connector
Key features
- STM32F405RGT6 MCU with BMI270 IMU on current units released from May 25, 2026; earlier units used ICM42688P/ICM42605.
- SPL06/SPA06 barometer, with dual independent sensor LDOs to improve sensor power stability.
- 3 UARTs plus SBUS, 6 PWM outputs, I2C, Type-C USB, HD VTX plug-in, and ELRS receiver plug-in support.
- Supports AP, Betaflight, and INAV; ArduPlane is recommended for fixed-wing use.
Suitable builds
- Small and micro fixed-wing aircraft where board size and weight matter.
- Builders who want ArduPlane/INAV capability in a compact airframe.
- HD digital video builds using DJI HD, Walksnail HD, OpenIPC, or similar HD OSD workflows.
Getting started
- Use the SH1.0 2P connector only for battery voltage detection and HD VTX direct-power input, not as the flight-controller power input.
- For fixed-wing aircraft, start from ArduPlane wiring examples and check UART/SERIAL mapping carefully.
- Use USB-C for configuration; mobile ground-station setup is possible with a USB-C to USB-C cable.