Product overview
The BETAFPV Toothpick F4 2-4S AIO Brushless Flight Controller 20A(BLHeli_S) combines flight control, electronic speed control and on-screen display electronics on one board for DIY 3–4-inch toothpick drones. Its STM32F411CEU6 processor runs at 100MHZ, paired with an MPU6000 six-axis sensor over SPI. The integrated ESC uses BLHELI_S firmware and accepts 2S–4S LiPo input, with a 20A continuous current rating and 25A burst rating. A built-in current sensor and AT7456E-based Betaflight OSD provide additional onboard functions.
The board measures 32.5 × 32.5mm, weighs 6.63g and uses a 26.5 × 26.5mm mounting pattern. Its side-mounted USB port allows mounting arrangements that retain physical access to the port, while edge-positioned solder pads support wiring work. Double-sided motor pads accommodate pin connections or directly soldered wires, with 1.25mm header-pin connectors specified. Supported motor families include 120X, 130X, 140X and 1505. Recommended components include 1505 or 1404 motors and HQ 3020 two-blade, HQ 3030 three-blade or HQ 4025 two-blade propellers.
Version selection affects peripheral integration. V3 retains V2 functions and adds an 8M Flash chip for Betaflight Black Box plus three full UARTs: UART1, UART2 and UART6. These allow a DJI or Caddx Vista digital FPV unit and an external receiver such as TBS Crossfire to use separate UART connections. V2 has only one full UART and does not support DJI digital FPV VTX. The supplied assembly package contains the controller, XT30 pigtail, mounting screws, nuts, rubber dampers and four motor pluggable pins; the pins are not pre-soldered.
Specifications
| Specification | Value & conditions |
|---|---|
| Product | BETAFPV Toothpick F4 2-4S AIO Brushless Flight Controller 20A(BLHeli_S) |
| Intended integration | Flight controller board for DIY 3–4-inch toothpick drones. |
| Integrated electronics | Betaflight MATEKF411 flight controller, Betaflight OSD, F4 MCU and 20A ESC; supports 2–4S batteries. |
| CPU | STM32F411CEU6 (100MHZ) |
| Six-axis sensor | MPU6000 (SPI connection) |
| Board dimensions | 32.5*32.5mm (26.5mm mounting holes) |
| Mounting pattern | 26.5x26.5mm |
| Weight | 6.63g |
| Flight controller firmware | BETAFPVF411 (BEFH) |
| On-screen display | Built-in BetaFlight OSD (OSD chip: AT7456E) |
| Receiver support | Frsky XM/XM+, Futaba, Flysky, TBS Crossfire and DSMX receivers. |
| Programmable LED support | Supports programmable LEDs such as WS2812. |
| Current sensing | Built-in current sensor. |
| ESC software and pass-through | Supports BLheli/BLHELI_S suite; pass-through ready. |
| ESC control protocols | PWM, Oneshot125, Oneshot42, Multishot, Dshot150, Dshot300 and Dshot600. |
| Input voltage | 2S-4S Lipo |
| Continuous current | 20A |
| Peak current | 25ABurst current. |
| ESC firmware | BLHELI_S |
| Motor connectors | 1.25mm header pins connector |
| Motor compatibility | 120X, 130X, 140X and 1505 motors. |
| Motors | 1505 Motors and 1404 MotorsRecommended components. |
| Propellers | HQ 3020 2-Blade Prop / HQ 3030 3-Blade Prop / HQ 4025 2-Blade PropellersRecommended components. |
| USB and solder-pad layout | Side-mounted USB port and solder pads positioned at the board edges. |
| Motor connection options | Double-sided motor solder pads with both pin and wire pads. |
| Motor pin assembly | Four motor pluggable pins supplied without pre-soldering.Default supplied configuration. |
| Black Box storage | Adds an 8M Flash chip for Betaflight Black Box while retaining V2 functions.V3 version. |
| UART integration | Three full UARTs: UART1, UART2 and UART6. Supports a UART connection for a DJI or Caddx Vista digital FPV unit alongside an external receiver such as TBS Crossfire.V3 version. |
| UART and digital FPV limitation | One full UART; does not support DJI digital FPV VTX.V2 board. |
| Included equipment | 1 Toothpick F4 20A AIO 2-4S brushless flight controller; 1 XT30 cable pigtail; 4 M2x10mm screws; 4 M2 nuts; 4 anti-vibration rubber dampers; 4 motor pluggable pins.Supplied package. |
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