F411 4S 20A Toothpick Brushless Flight Controller V5 BLHeli_S (BMI270)
As a continuation of the F411 chip, the V5 FC board is upgraded from the F4 20A V3 FC board. F411 4S 20A Toothpick Brushless Flight Controller V5 adopts BMI270 gyroscope instead of MPU6000 on V3 board. With two built-in plug&play ports for receiver and HD digital VTX, it is easy to install and requires less soldering work. Additionally, the board is a solid value for long-lasting use thanks to the high-quality PCB material and improved manufacturing process.
Bullet point
- With a large solder pad, it is easy to solder external electronics. Furthermore, the V5 board features plug&play ports for the receiver and HD digital VTX, which requires less soldering work for convenient installation.
- High-quality MOSFETs are applied to F411 4S 20A FC V5 to handle 20A continuous current and reach 25A peak current.
- The motor solder pads are reinforced by thick copper and edge plating technology, allowing lower resistance for higher current on the motors.
- F411 4S 20A FC V5 reserves UART port layout, UART1 for RX, UART2 for DJI OSD or VTX analog and UART6 for spare use, more convenient for pilots to solder.
- Come with 25.5*25.5mm whoop mounting template, this board can be added to both toothpick drone and cinematic whoop quadcopter frame like Pavo25eX-knight 35.
Specific
Flight controller
- CPU: STM32F411CEU6 (100MHZ)
- Six axis: BMI270 (SPI connection)
- Mounting size: 25.5*25.5mm (M2 anti-vibration rubber damper available)
- FC firmware: betaflight_4.3.x_BETAFPVF411
- OSD: Built-in Betaflight OSD (OSD chip: AT7456E)
- Receiver: SBUS/CRSF/DSMX receiver
- BEC: 5V 3A
- Integrated current sensor
- Weight: 8.15g
ESC
- ESC chip: SILABS EFM8BB21F16G-C
- Supports D-shot150, D-shot300, D-shot600, Oneshot125, Multishot, PWM
- Input voltage: 2S-4S Lipo
- Continuous current: 20A
- Peak Current: 25A
- Firmware: G_H_20_REV16_7.HEX (default BLHeli_S), BLUEJAY (optional)
Note: F411 4S 20A FC V5 is available to flash BLHeli_S and BLUEJAY ESC firmware and comes with default BLHeliI_S firmware. The main difference is that BLUEJAY firmware supports two-way D-shot, while BLHeli_S does not.
Comparison with F411 4S 20A V3 FC
We have upgraded F411 4S 20A V3 to V5 board by adopting BMI270 gyroscope instead of MPU6000 and adding some new features. The BMI270 gyroscope works great in most cases, especially at low frequency. Unlike the V3 board which supports JST1.25 connectors, the motor solder pads on the V5 board are solder only and reinforced by thick copper and edge plating technology, allowing for lower resistance for higher current on the motors. In addition, the V5 FC board features high-quality material for soldering stability and durability in use. The images below show the difference between the two flight controllers.
Diagram for Toothpick F411 4S 20A Brushless FC V5
The board integrates 3 LEDs, including the Power LED (red), the FC LED (blue) and the receiver LED. 
External VTX digital RX/HD connection
F411 4S 20A FC V5 integrates the Plug & Play port for external RX and HD digital VTX and in the package there will be a 4-pin connector for RX and a 6-pin connector for HD digital VTX. Therefore, we strongly recommend pilots to use the port to save welding work.
FC and ESC firmware
The default firmware includes the CLI dump file. But if you flash the firmware from the official Betaflight configurator site, you flash a CLI dump file for F411 4S 20A FC V5. We offer the default firmware and CLI dump file for download.
The BMI270 gyroscope will need more software filters and is sensitive to high frequencies. This can be resolved by adjusting the filter settings in PID optimization. The Betaflight or BETAFPV default FC CLI and firmware dump file do not include filter settings. For pilots who want to configure it, we recommend setting low lap 2 to 145Hz and choosing the filter type to PT2.
F411 4S 20A FC V5 is available to flash BLHeli_S and BLUEJAY ESC firmware and comes with default BLHeliI_S firmware. The main difference is that BLUEJAY firmware supports two-way D-shot, while BLHeli_S does not. Here are the download links for two firmwares.
When using the BLHeli_S ESC firmware, configure the settings on the BLHeli - Configurator software.
We offer BLUEJAY ESC firmware for pilots. When using BLUEJAY ESC firmware, configure the ESC on the ESC-Configurator software.
Recommend parts
- Motors: 1404 brushless motors, 1506 brushless motors
- Battery: 2S 600 mAh, 3S/4S 850 mAh,4S 750 mAh, or 4S 1000 mAh
- Frame: Pavo25 frame, X-knight 35, or other frames with whoop mounting pattern.
Package Included
- 1 * F411 4S 20A Toothpick Brushless Flight Controller V5 BLHeli_S (BMI270)
- 1 * Pigtail Cable (XT30)
- 1 * 6 Pin Connector for Digital VTX
- 1 * 4 Pin Connector for RX
- 4 * M2x10 Screws
- 4 x M2 nuts
- 4 * M2 Anti-vibration Rubber Shock Absorbers
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