F4 1S 12A AIO Brushless Flight Controller 2022 is the default FC for Cetus X brushless whoop quadcopter, also great for 85mm whoop drones like Meteor85 and 3″ toothpick drones. We updated the FC to V2.2 with BMI270 gyro and BB51 ESC hardware in place of ICM20689 gyro and BB21 ESC hardware.

Features

• 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

This new BLHeli_S firmware (named C_X_30_REV16_7.hex) is supported by BLHeli Configurator, BLHeliSuite, and Bluejay Configurator.

Diagram for F4 1S 12A AIO FC

Below is the diagram for the SPI Frsky version board. UART1, UART2, and SBUS pads are left for external receivers like Frsky XM+, TBS Nano receiver so that a long receiver range is available.

Buzz pads (BUZZ+ and BUZZ-) are invalid directly. It needs some modification to make it works.

ELRS Version Pinout

SPI FRsky Version Pinout

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!

Integrated SPI Receiver

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 select the ELRS version.  Within betaflight select SPI-RX and ExpressLRS as the receiver provider.

The SPI Frsky Receiver (CC2500 chip) version of the 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.

Included

Please note, the accessories included with this flight controller may change over time based on supply, so they may differ from that in photos.

• 1 * F4 1S 12A AIO FC
• Accessories Pack