The ultralight F4 1S 5A AIO Brushless Flight Controller is back in stock with new and upgraded features. We updated the FC with high-quality BMI270 gyro and BB51 ESC hardware. In addition, this new board supports the Betaflight Blackbox function.

Check out all our Whoop Style AIO Flight Controllers and the rest of our BetaFPV Products!

Features

The SPI Frsky version board reserves an SBUS port and a UART port, which is available for the SBUS protocol receiver or other external receivers.
Built-in an 8MB flash memory chip dedicated to Blackbox logging. It’s an extremely powerful tool for tuning and troubleshooting an FPV drone.
Integrated motor pin connectors, it is easy to install motors without soldering work.
Particular design with only 3.6g ultralight weight, reasonable layout, and easy to build. With a 26*26mm mounting hole size, it is fully compatible with the whoop frame in the current market.

Specification of FC

CPU: STM32F411CEU6 (100MHZ)
Six-Axis: BMI270
Built-in Receiver: SPI CC2500 (Frsky)
Receiver antenna: Line antenna
FC Size: 30*30mm
Mounting Hole Size: 26*26mm
Firmware version: betaflight_4.2.11_BETAFPVF411RX (Frsky)
OSD: Built-in BetaFlight OSD
Blackbox: 8MB
Power Cable: 55mm, with BT2.0 connector
Weight: 3.7g without power cable and BT2.0 connector

Specification of ESC

Power supply: 1S
Current: 5A continuous and peak 6A (3 seconds)
ESC firmware: A_X_5_.HEX for BB51 BLHeli_S hardware
Signal Support: D-shot150, D-shot300, D-shot600, Oneshot125, Multishot, PWM

The BLHeli_S firmware could support the BB51 hardware now. This board is powered by BB51 hardware. If you want to setup the ESC specification, please use the BLHeliSuite16714902A_Beta or ESC-Configurator.

Note: Only SPI ELRS 2.4G version supports motor direction set through Betaflight Configurator and SPI Frsky version does not support. BLHeli Configurator, and Bluejay Configurator are invalid for the BB51 ESC (both versions).

Diagram

Below is the diagram for SPI Frsky RX.

SPI Frsky RX

Come with the built-in SPI Frsky Receiver (CC2500 chip), F4 1S 5A AIO FC can be compatible with Futaba S-FHSS, Frsky D8, and D16 protocol. The default protocol is configured to Frsky D16 FCC out of the factory. Pilots could set up the protocol according to your own need in Betaflight Configurator.

Configuration	Protocol
FRSKY_D	Frsky D8
FRSKY_X	Frsky D16 FCC (ACCST 1.X version)
FRSKY_X_LBT	Frsky D16 LBT (ACCST 1.X version)
SFHSS	Futaba S-FHSS

How to Bind with Betaflight FC with SPI Frsky Receiver.

Betaflight Firmware and CLI

F4 1S 5A AIO Brushless Flight Controller comes with the default firmware betaflight_4.2.11_BETAFPVF411RX (Frsky).

For the SPI Frsky version, DO NOT flash the other firmware, otherwise, the RX will be lost in control at a very close range. We have already built our own firmware betaflight_4.2.11_BETAFPVF411RX for SPI Frsky RX version to support BMI270 gyro. Please check the below link to download the firmware.

Download the firmware and CLI dump file for the F4 1S 5A FC ELRS/Frsky board.

Note: The RX RSSI values drop when the flight controller is installed on the quadcopter with HD digital VTX (Walksnail or HDZero). For example, the theoretical failsafe RSSI values for 250Hz packet rate are -108dBm. Actually, the RX will be possibly lost in control when the RX RSSI values reach about -92dBm.

Bluejay ESC Firmware

F4 1S 5A flight controller with BB51 ESC hardware could flash the Bluejay ESC firmware now, which is based on BLHeli_S revision 16.7. With Bluejay ESC firmware, it supports bidirectional D-shot and RPM filtering in Betaflight, offers 24KHz, 48KHz, and 96KHz fixed PWM frequency for options, and custom start-up melodies. By using Bluejay ESC firmware on Meteor65 and Meteor65 Pro whoop drones with 0802SE 19500KV motors, the flight time is increasing effectively. The default firmware for F4 1S 5A FC will be changed to Bluejay ESC firmware.

For pilots who want to flash Bluejay ESC firmware for F4 1S 5A FC, please use the BLHeliSuite16714902A_Beta or ESC-Configurator and download Bluejay ESC firmware A_X_5_.HEX from the below links.

Connecting External RX/HD Digital or Analog VTX

Package

1 * BetaFPV Toothpick F4 1S 5A AIO Brushless Flight Controller - Frsky SPI
4 * M1.2x4mm Screws
4 * M1.4x5mm Screws
4 * Anti-vibration Rubber Dampers

BetaFPV Toothpick F4 1S 5A AIO Brushless Flight Controller V3 - Frsky SPI