BetaFPV F4 1S 5A AIO Brushless Flight Controller (ELRS 2.4G)
The classical ultralight F4 1S brushless FC comes back with SPI ExpressLRS 2.4G receiver.
Note: The default flight controller firmware only supports ELRS V1.0. However, this flight controller can work with ELRS V2.0 by flashing the Betaflight V4.3.0 RC1-RC3 firmware. The target file name is BETAFPVF4SX1280.
https://github.com/betaflight/betaflight/releases
SPECIFICATIONS OF FC
- CPU: STM32F411CEU6 ( 100MHZ )
- Six-Axis: ICM-20689/MPU-6000
- Built-in Receiver: SPI ExpressLRS 2.4G
- Receiver antenna: 2.4GHz SMD ceramic antenna
- Size: 29mm x 29mm, fully mounting pattern compatible with the whoop frame in the current market
- Firmware version: betaflight_4.3.0_STM32F411_norevision
- OSD: Built-in BetaFlight OSD
- Recommend VTX: >=200mW, like BETAFPV M03 350mW VTX or TBS Unify VTX
- Power Cable: 55mm, with BT2.0 connector
- Weight: 3.13g (no power cable included)
SPECIFICATIONS OF ESC
- Power supply: 1S
- Current: 5A continuous and peak 6A (3 seconds)
- Support BLHeliSuite programmable
- Factory firmware: O_H_5_48_REV16_8.HEX
- Signal Support: D-shot150, D-shot300, D-shot600, Oneshot125, Multishot, PWM
Betaflight Firmware and CLI
Since Betaflight has not yet released the official firmware that could supports the SPI ExpressLRS protocol, the current version is the Beta version. Please use the firmware and the CLI dump file below to recovery the FC board if needed. Betaflight will update their official target soon. Please feel free to contact us if you have any issues with this Beta version Firmware.
It is normal that there is no option on Betaflight Configurator Receiver. As is shown below, the checkbox is blank.
Please change the “PID loop frequency” to “4KHZ” , sometimes it would make the SPI receiver not working correct while the value is “8KHZ”.
New released firmware BTFL_4.3.0_BETAFPVF4SX1280_0265565fa uses external GPIO interrupt triggers to process ELRS data reception, increasing the stability of the signal link. Now it can perfectly support LiteRadio 2 SE 500Hz link and modify the accuracy of signal strength.
The new CLI file is named BTFL_cli_F4 5A ELRS_NEW. Please check.
Note: The new firmware supports only ELRS 1.0.0, 1.0.1, 1.1.0, 1.2.0, 1.2.1.
Download the firmware and CLI dump file for the F4 1S 5A FC (ELRS 2.4G) board.
How to Bind with Betaflight FC with SPI ExpressLRS Receiver.
More details and discussion on Github about SPI ELRS receiver.
DIAGRAM
Larger motor pad for conveniencty solder directly.
PACKAGE
- 1 * F4 1S brushless flight controller (BT2.0 Connector)
- 4 * M1.2x4mm screws
- 4 * M1.4x5mm screws
- 4 * Anti-vibration rubber dampers
