SpeedyBee F405 Mini 20x20 Flight Controller

The SpeedyBee F405 Mini is a 20x20 mm Betaflight flight controller with built-in Bluetooth, so you can configure and tune the quad from the SpeedyBee phone app at the field instead of carrying a laptop. It suits compact freestyle, racing and cinewhoop builds running 3-6S.

Key features

• STM32F405 processor with ICM42688P gyro, built-in barometer and AT7456E analog OSD chip
• Bluetooth link to the SpeedyBee app for flight controller and ESC parameter setup
• Six UARTs, one reserved for ESC telemetry, plus 8 MB of onboard blackbox flash
• 9 V 3 A output for an HD air unit alongside four 5 V pads (2 A combined)
• Solder pads for a direct connection to DJI O3, RunCam Link, Caddx Vista and DJI Air Unit V1
• 4-level battery indicator and Type-C USB

Specifications

• MCU: STM32F405
• Gyro: ICM42688P
• Barometer: Built-in
• OSD chip: AT7456E
• Blackbox: 8 MB onboard flash
• UARTs: 6 (UART4 for Bluetooth, UART5 for ESC telemetry)
• Input voltage: 3-6S LiPo
• BEC outputs: 5 V 2 A total (4 pads), 9 V 3 A, 4.5 V 1 A, 3.3 V 500 mA
• USB: Type-C
• Mounting: 20 x 20 mm, 3.5 mm holes (M2 or M3 screws, silicone grommets)
• Dimensions: 30 x 32 x 7.8 mm
• Weight: 9.6 g
• Betaflight target: SPEEDYBEEF405MINI

Bluetooth only works with MSP enabled on UART4 at 115200 baud, so leave that port for it. Firmware flashing and blackbox download are not wireless: use Betaflight Configurator on a PC for both. The board pairs with the SpeedyBee BLS 35A Mini V2 4-in-1 ESC as a 20x20 stack.