SpeedyBee F405 AIO 35A-40A Bluejay 25.5x25.5 3-6S Flight Controller V2
Low stock
In stock, ready to ship
Pay Secure
Tech Suppoort
Most orders are shipped within 48 hours
Shipping calculated at checkout. Shipping policy
Frequently Asked Questions
What is the difference between the 35A (No CNC Case) and 40A (CNC Case) versions?
The 35A version is the bare board — lighter and ideal for weight-sensitive builds. The 40A version adds a CNC-machined aluminum case for crash protection and better heat dissipation, and supports slightly higher sustained ESC current for demanding 6S setups.
Does this board support Betaflight RPM filtering?
Yes. The Bluejay ESC firmware supports bidirectional DSHOT, which enables RPM telemetry and RPM filtering in Betaflight for significantly cleaner motor control.
Can I tune Betaflight without a laptop?
Yes. The onboard Bluetooth module pairs with the free SpeedyBee app (iOS and Android) for wireless PID tuning, blackbox download, and firmware updates.
Is this compatible with DJI O3 or DJI Air Unit?
Yes. The board includes a dedicated JST connector for DJI digital FPV systems, eliminating the need to manually solder the DJI harness.
What frame mounting pattern does this board use?
25.5 × 25.5mm with Ø3mm mounting holes — compatible with most 3-inch to 5-inch micro and standard frames that support this pattern.
What's in the Box
- 1x SpeedyBee F405 AIO V2 Flight Controller — 35A or 40A per selected version
- 1x ESC (integrated on AIO board)
- 1x Mounting hardware and accessory cables
- 1x CNC aluminum case — 40A version only
Let customers speak for us
Description
The SpeedyBee F405 AIO V2 is a 25.5 × 25.5mm all-in-one flight controller and ESC stack designed for 3–6S FPV builds where space and weight are at a premium. The STM32F405 processor runs Betaflight with full feature support, while the integrated Bluejay ESC firmware delivers smooth, low-latency motor control straight out of the box. Whether you are building a 3-inch toothpick or a 5-inch freestyle quad, the F405 AIO V2 removes the wiring complexity of a separate stack and gets you in the air faster. Choose your version from the dropdown: the 35A (No CNC Case) for the lightest possible build, or the 40A (CNC Case) for added protection and higher sustained current.
Contents
Why Builders Choose the F405 AIO V2
Wiring a separate FC and ESC stack on a micro build is one of the most frustrating parts of the hobby — fragile solder joints, tight cable routing, and mismatched connector pinouts all add up to hours of bench time before your first flight. The F405 AIO V2 solves this by integrating everything onto a single 25.5mm board, with clearly labelled pads, a dedicated DJI Air Unit connector, and Bluetooth tuning so you can adjust PIDs from your phone without a USB cable.
Key Features
✅ STM32F405 Processor + Betaflight Ready — Full Betaflight support with OSD, blackbox logging, and RPM filtering. No custom firmware required — flash and fly.
✅ Bluejay ESC Firmware (35A / 40A) — Bluejay delivers precise, low-latency motor control with bidirectional DSHOT and RPM telemetry built in. The 40A version handles higher sustained loads for 5-inch 6S builds.
✅ Bluetooth Wireless Tuning — Pair with the SpeedyBee app on iOS or Android to adjust Betaflight settings, check blackbox logs, and update firmware without a laptop or USB cable.
✅ Dedicated DJI Air Unit / O3 Connector — A plug-and-play JST connector for DJI digital FPV systems eliminates manual soldering of the DJI harness, reducing wiring errors on digital builds.
✅ 4× UART Ports — Four full UARTs give you enough ports for GPS, receiver, VTX, and telemetry simultaneously — no port sharing or softserial workarounds needed.
✅ Dual BEC Output — Regulated 5V and 9V/12V BEC outputs power your camera, VTX, and receiver directly from the board, reducing the need for external regulators.
✅ RGB LED Support — Onboard LED strip output for Betaflight LED control, configurable for arming status, flight mode, and custom effects.
✅ CNC Aluminum Case Option — The 40A variant includes a CNC-machined aluminum case that protects the board in crashes and acts as a heatsink for sustained high-current ESC operation.
Specifications
Specification source: SpeedyBee official specifications. Verify with the latest SpeedyBee documentation before building.
Package Includes
- 1 × SpeedyBee F405 AIO V2 Flight Controller (35A or 40A, per selected version)
- Mounting hardware and accessory cables
- CNC aluminum case included with 40A version only
⚠️ Important: Motors, propellers, frame, receiver, VTX, camera, and battery are not included. Confirm your frame’s mounting pattern supports 25.5 × 25.5mm before ordering. Always verify ESC current ratings against your motor and propeller combination.

SpeedyBee F405 AIO V2 — compact 25.5mm AIO FC with Bluejay ESC and Bluetooth tuning — available at SoarSky

SpeedyBee F405 AIO V2 — product overview and key highlights

Feature summary — STM32F405, Bluejay ESC, Bluetooth, DJI connector, and dual BEC at a glance

AIO design — FC and ESC integrated on a single 25.5mm board, eliminating inter-board wiring

Size comparison — 25.5 × 25.5mm footprint fits 3-inch to 5-inch micro frames with standard mounting

Clearly labelled solder pads — motor, power, receiver, and VTX connections are easy to identify and solder

Wireless Bluetooth configuration — connect to the SpeedyBee app on iOS or Android to tune without a laptop

SpeedyBee app PID tuning — adjust rates, filters, and blackbox settings wirelessly from your phone

USB-C connector and port layout — USB-C for Betaflight Configurator, with UART and signal port positions labelled

Power system overview — 3–6S LiPo input with onboard BEC supplying 5V and 9V/12V regulated outputs

Dual BEC output — 5V for receiver and FC peripherals; 9V/12V selectable for camera and VTX power

RGB LED strip support — onboard LED output configurable in Betaflight for arming status and flight mode indication

4× UART port layout — dedicated ports for GPS, receiver, VTX, and telemetry with no softserial required

Motor output pads M1–M4 — clearly marked solder points for standard quadcopter motor wiring

Mounting hole diagram — 25.5 × 25.5mm pattern with Ø3mm holes; verify frame compatibility before ordering

Board dimensions and thickness — precise measurements for stack height planning in tight frames

Package contents — flight controller, mounting hardware, and accessory cables; CNC case included with 40A version

Included accessories — cables, connectors, and mounting hardware for a clean and complete installation

Wiring diagram — motor, ESC, receiver, and VTX connection reference for a complete FPV build

Betaflight setup guide — recommended configuration steps for first-time setup and port assignment

Full specifications table — STM32F405 processor, ICM-42688-P gyro, and all electrical parameters at a glance

Manual and support resources — scan the QR code to access the SpeedyBee F405 AIO V2 official documentation
Pair It With
Build a complete micro FPV quad with these compatible parts from SoarSky:
- Browse all FPV Flight Controllers at SoarSky — compare stacks, AIOs, and F7 options
- FPV Drone Parts Collection — motors, ESCs, VTX, and accessories for your build
FAQ
Q: What is the difference between the 35A (No CNC Case) and 40A (CNC Case) versions?
A: The 35A version is the bare board — lighter and ideal for weight-sensitive builds. The 40A version adds a CNC-machined aluminum case for crash protection and better heat dissipation, and supports slightly higher sustained ESC current for demanding 6S setups.
Q: Does this board support Betaflight RPM filtering?
A: Yes. The Bluejay ESC firmware supports bidirectional DSHOT, which enables RPM telemetry and RPM filtering in Betaflight for significantly cleaner motor control.
Q: Can I tune Betaflight without a laptop?
A: Yes. The onboard Bluetooth module pairs with the free SpeedyBee app (iOS and Android) for wireless PID tuning, blackbox download, and firmware updates.
Q: Is this compatible with DJI O3 or DJI Air Unit?
A: Yes. The board includes a dedicated JST connector for DJI digital FPV systems, eliminating the need to manually solder the DJI harness.
Q: What frame mounting pattern does this board use?
A: 25.5 × 25.5mm with Ø3mm mounting holes — compatible with most 3-inch to 5-inch micro and standard frames that support this pattern.
Note: Specifications are based on SpeedyBee official documentation. Always verify compatibility with your specific build components before purchase.
Ready to simplify your next FPV build? Add the SpeedyBee F405 AIO V2 to your cart today.
Shipping Info
🏭 Fulfillment Warehouses
SoarSky operates warehouses in the US, Europe, and China. Orders are fulfilled from the nearest local warehouse. If local stock is unavailable, your order will ship from our China warehouse and international shipping times will apply.
💰 Shipping Rates
| Type | Condition | Cost |
|---|---|---|
| Free Shipping | Orders over $100 | Free |
| Standard Shipping | Orders under $100 | Based on weight & address |
| International Shipping | All international orders | Based on destination & weight |
⏱️ Dispatch & Delivery Times
| Region | Estimated Delivery |
|---|---|
| Domestic (US) | 5–10 business days |
| International | 10–15 business days |
* Customs processing may affect international delivery times.
🚫 Shipping Restrictions
Some remote areas may experience longer delivery times or limited shipping options. We will notify you if any issues arise.
📦 Order Tracking
Once your order ships, you will receive a confirmation email with a tracking number. Track your shipment via:
| Platform | Link |
|---|---|
| 17Track | www.17track.net |
| SoarSky Order Tracker | soarskyrc.com/pages/track-order-1 |
📬 Contact Us
If you encounter any issues such as damaged items or lost packages, please contact our customer service team as soon as possible and we will work to resolve it promptly.