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F4 1S 12A AIO Brushless Flight Controller V2.2 is the default FC for Cetus X brushless whoop quadcopter, also great for 85mm whoop drones like Meteor85 and 3″ toothpick drones like HX115 SE Toothpick Drone and HX115 LR Toothpick Drone. We updated the FC to V2.2 with BMI270 gyro and BB51 ESC hardware in place of ICM20689 gyro and BB21 ESC hardware.

F4 1S 12 AIO SPI Frsky V1.2 is coming soon. Please stay tuned for it.

Tons of ExpressLRS items are available now!

Bullet Point

• F4 1S 12A AIO Flight Controller is the best choice for building ultra-lightweight 3″ toothpick drones like HX115 SE FPV Quad and 85mm whoop drones. Recommend Meteor85.
• Most of the 1S flight controllers on the market come with 5A ESC by now, but this FC especially integrates 1S 12A ESC, providing more sufficient power for 3″ toothpick drones or 85mm whoop drones.
• Built-in current meter, 2 programmable RGB LEDs, and SPI ELRS or Frsky receiver. At the same time, all the pads are left for the external receivers with UART1 and UART2, for buzzers, etc.
• Large pads are reserved for solder motor cables, this design will make solder easier.

Specification of FC

• Item: F4 1S 12A AIO FC
• Weight: 4.74 g (without power cable and BT2.0 connector)
• CPU: STM32F411CEU6 (100MHZ )
• Six-Axis: BMI270 (SPI connection)
• Firmware version: betaflight_4.3.1_BETAFPVF4SX1280
• OSD: Built-in BetaFlight OSD (STM32 controls OSD chip over SPI in DMA mode)
• Receiver: SPI ELRS 2.4G Receiver
• Motor Pin Connector: 1.25mm Header Pins
• Mounting Hole Size: 26mm x 26mm (suitable for whoop pattern mounting hole)
• USB Port: SH1.0 4-Pin

Specification of 1S 12A ESC

• Built-in ESC with 12A continuous and peak 25A current
• Input voltage: 1S-2S
• ESC firmware: C_X_30_REV16_7.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 V2.2 board is powered by BB51 hardware. If you want to setup the ESC specification, please use the BLHeliSuite16714902A_Beta or ESC-Configurator.

• ESC-Configurator: https://preview.esc-configurator.com/
• Download BLHeliSuite16714902A_Beta here.
• Download the BB51 ESC firmware C_X_30_REV16_7.HEX. Please choose C_X_30.

Note: BetaFlight Configurator, BLHeli Configurator, and Bluejay Configurator are invalid for the BB51 ESC now.

Diagram for F4 1S 12A AIO FC

Below is the diagram for ELRS 2.4G V2.2 board.

The current meter is integrated on the FC board. Here is the configuration in Betaflight Configurator.

12A 1S ESC

Should we really need a 12A ESC for 1S drones? If it is a 65mm or 75mm Whoop drone-like Meteor65, 5A ESC is enough for all actions. But how about with 3″ propellers and 1102/1202.5 motors? Still, want smooth and powerful flying actions? The 5A ESC has developed about 3 years ago and was designed for whoop drones with 0603/0802 motors. For the past year, the BETAFPV team has been cooperating with BLHeli author Steffen on the 12A 1S ESC for 3″ toothpick drones. Finally, it is here!

SPI ELRS 2.4G RX

This board integrates the receiver with the most popular radio link ExpressLRS since 2021. ExpressLRS aims to achieve the best possible link performance in both speeds, latency, and range.

This board is designed for long-range 3inch ultralight toothpick drones or 2S whoop drones. If you want to try ExpressLRS on 65mm/75mm whoop drones, please build it with our F4 1S FC board with a built-in SPI ExpressLRS receiver.

F4 1S 12A AIO V2.2 integrates SPI ELRS 2.4G RX. The configuration is as follows.

How to Bind with Betaflight FC with SPI ExpressLRS Receiver.

How to Bind with Betaflight FC with External ExpressLRS Receiver.

More details and discussion on Github about SPI ELRS receiver.

SPI Frsky RX

Come with the built-in SPI Frsky Receiver (CC2500 chip), F4 1S 12A 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.

How to Bind with Betaflight FC with SPI Frsky Receiver.

Betaflight Firmware and CLI

F4 1S 12A AIO SPI ELRS 2.4G comes with the default firmware betaflight_4.3.1_BETAFPVF4SX1280, which supports ELRS V2.0 only. We update the gyro to BOSH BMI270 since the V2.2 version.

Pay attention, ONLY the newest Betaflight firmware 4.3.1 start to support this BMI270 gyrometer. Please check the below link to download the firmware.

Download the firmware and CLI dump file for the F4 1S 12A FC (ELRS 2.4G) V2.2 board.

Recommend Parts

If you want to try the popular ExpressLRS receiver version for long-range performance, highly recommend you check the items for the ExpressLRS series.

• Drones: Cetus X, 85mm whoop frame like Meteor85, 3″ toothpick drones
• Battery: BT2.0 450mAh 1S 30C Battery
• Motor: 1102 18000KV motor, 1103 11000KV motor
• Propeller: HQ3020 2-blade Props, 2020 4-blade Props

Package

• 1 * F4 1S 12A AIO FC
• 4 * Anti-vibration Rubber Dampers
• 4 * M2 x 10mm Screws
• 4 * M2 x 10mm Screws
• 4 * M2 Screw Nut
• 8 * PH-1.25 Connectors for Motor
• 1 * SH1.0 4-Pin Cable
• 1 * SH1.0 4-Pin to USB Type-C Adapter

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