Radiolink F405

User-centered Design

Experience Effortless and Efficient Control

Supports Multiple Open-source Firmware (ArduPilot, Betaflight, INAV)

High-end Configuration + Extreme Performance

Industrial-grade Circuit Design

Redevelopment Supported

HD Digital and Analog Video Transmission Plug-and-play

Built-in OSD Module

Cost-effective Integrated Solutions

Unique Automation Software Testing System

Supports Multiple Signal Protocols (DSM/SBUS/TBS Crossfire/ELRS)

The RadioLink F405 Flight Controller is an all-in-one flight control system that integrates high performance, exceptional reliability,

and intelligent design, tailored for multi-scenario applications such as racing drones, aircraft, and multi-rotor UAVs.
Combining a decade of RadioLink’s independent flight control R&D expertise with industrial-grade hardware design philosophy,

the F405 delivers unparalleled control experience and enhanced flight safety.
Redevelopment is supported (the source code is reviewed).

Supports Multiple Open-source Firmware

F405, fully compatible with mainstream open-source firmware of ArduPilot, Betaflight,

and INAV, achieves razor-sharp responsiveness for racing scenarios and robust stability for autonomous flight.

Professional Design, Extreme Performance

High-End Configuration

Equipped with the STM32F405RGT6 main control chip, delivering powerful computing capabilities and ultra-fast processing speed, 168MHz core frequency; features a BMI270 high-precision gyroscope with dedicated LDO power supply for lower noise and faster response; dual gyroscope pads reserved for optional MPU6500 replacement to meet diverse needs; paired with the SPL06-001 high-precision barometer for enhanced accuracy in altitude hold and return-to-home operations.

Storage Capacity

128MB high-capacity blackbox, enabling comprehensive flight data recording and supporting long-term fault tracing.

SBUS Receiver

GPS

Industrial-Grade Circuit Design, Ensured Safety

Power Supply Optimization

4.5V/5V isolated circuit design* prevents device damage from current overload during parameter adjustments;

9V programmable BEC switch enables flexible video transmission power control*.

Analog Video Transmission

F405 Flight Controller

4-in-1 ESC

Camera

DJI HD Digital Image Transmission

*Integrated multi-channel BEC: 3.3V/300mA, 5V/3A, and 9V/3A outputs support external peripherals including receivers, FPV transmitters, cameras, servos, LED strips, and other types of devices.

*Video transmission power management: video transmission power can be toggled directly via remote controller, or parameters like transmission power and frequency can be adjusted through remote-FPV goggle synergy.

Anti-Interference Capability

2oz thickened copper PCB technology enhances current capacity by 50% and reduces electromagnetic interference (EMI). Extensive capacitor filtering ensures cleaner circuit signals and more stable chip operation.
Triple-layer protection with ferrite beads, TVS diodes, and high-voltage-tolerant DC chips effectively suppresses motor back-EMF surges, minimizing flight control board burnout risks.

ESC Connect Port

Compact Design, Versatile Compatibility

Within a compact 30.5×30.5mm footprint, the F405 supports 6 output channels and is compatible with a wide range of models, including 2-6-axis multi-rotors, fixed-wing aircraft, helicopters, flying wings, cars, boats, robots, lawn mowers, and bait boats.

Camera Connect Port

DJI Digital Image Transmission Connect Port

Analog Video Transmission Connect Port

GPS Connect Port

SBUS Receiver Connect Port

Solder Pad: for GPS or SBUS Receiver

*For the pad definition and connection diagram details, please check the manual

Solder Pad: for ESC and Camera

Solder Pad: for Buzzer, LED Strip, Black Sheep Receiver, DJI HD Image Transmission, Analog Video Transmission

Socket Interface, HD Digital

and Analog Video Transmission Plug-and-play

A 6-pin socket interface designed for DJI high-definition digital image transmission plug-and-play. A 4-pin VOUT socket interface is designed for analog image transmission connections.

More Interfaces Can Be Expanded as You Need

By combining socket interfaces and soldering pads, more interfaces can be expanded without changing the size of the flight controller to meet the needs of more DIY functions.

Compact Design, Versatile Compatibility

Within a compact 30.5×30.5mm footprint, the F405 supports 6 output channels and is compatible with a wide range of models, including 2-6-axis multi-rotors, fixed-wing aircraft, helicopters, flying wings, cars, boats, robots, lawn mowers, and bait boats.

Automatic Agricultural vehicle

Lawn Mower

Baitboat

GPS Heavy Lift Drone

Fixed-wing

Helicopter

User-Friendly Functional Upgrades

All-in-One Plug-and-Play Interfaces

It supports a direct 6-pin connection to the DJI O3/O4 plug-and-play and seamless compatibility with peripherals

such as GPS, OSD, and video transmitters, delivering unparalleled expandability.

DJI HD Digital Image Transmission

CADDX HD Digital

Image Transmission

Analog Video

Transmission

Intelligent Tuning Support

Parameters can be adjusted via Radiolink and open-source Mission Planner, Betaflight, and INAV Configurator

while monitoring critical parameters such as voltage and attitude in real time through the OSD interface.

Installation-Friendly Design

Featuring optimized pad and socket layouts compatible with mainstream frame installations, with soldering and cable routing efficiency improved by 40%.

Supports Mainstream Throttle Signals

Seamlessly supports bidirectional DShot digital throttle communication, DShot, OneShot,

and PWM signals while also enabling ESC telemetry feedback.

Supports Multiple Signal Protocols

Supports SPEKTRUM, SBUS, TBS Crossfire(Black Sheep), and ExpressLRS receiver, ensuring full compatibility with all mainstream remote controllers on the market.

ELRS Receiver

Black Sheep Receiver

SBUS Receiver

Rigorous Quality Control

Reliable Assurance

Unique Automation Software Testing System

Featuring a self-developed, industry-leading full-parameter testing process, every flight control unit undergoes 20 rigorous tests, including high-temperature resistance, vibration tolerance, signal stability, and port functionality verification. This system not only ensures high production efficiency but also guarantees comprehensive full-parameter and full-functionality testing for each flight control board.

Supply Chain Assurance

Utilizing industrial-grade LDOs and proven component selection to ensure

stable operation in environments ranging from -30°C to 85°C.

Cost-effective Solution

Flight controller F405 works with the 16 channels remote control system T16D, the 16 channels receiver R16F, the 50 Centimeters Positioning Accuracy GPS TS100, the DJI/CADDX high-definition digital image transmission, and HD Goggles, and the ELRS long-range module, almost all the parts of the RC drone you need we can offer, realizing the super adaptability of various cost-effective solutions such as high-speed aerial photography and cinematography solutions.

Battery

4-in-1 ESC

Receiver

F405 Flight Controller

GPS

Motor

Propeller

HD Digital Image Transmission System

2.4GHz Long-Range Module

HD FPV Goggles

Remote Control

Use Guarantee

Installation and Parameter Setting are not Difficult

With the accumulation of research and development in the past ten years, we have reanalyzed and retested all the functions of all the models including airplanes, multi-copters, helicopters, cars, and boats. All the usage guidance needed for all functions from basic use, PID parameter adjustment, log viewing, etc. of each model we can offer.

FAQ on the official website, Facebook, YouTube, Instagram, TikTok and the professional section of the forum, Radiolink is eager to help users use Radiolink products on multiple platforms.

* The parameter setup and firmware upgrade software includes Radiolink Mission Planner, ArduPilot Mission Planner, Betaflight Configurator, and INAV Configurator.

* F405 is compatible with APM, Betaflight, and INAV Firmware.

* The Betaflight team is reviewing the firmware for Radiolink F405. Currently, only the Radiolink firmware can be loaded from Betaflight Configurator

* In the process of using the F405, if you encounter problems, you can view the instructions, tutorials, or FAQ on the navigation bar of this introduction.

* After consulting all the tutorials, you still have questions about the operation. You can consult our technical support by emailing after_service@radiolink.com.cn

F405 Packing List