F4 1S 12A AIO Brushless FC V3, the FIRST flight controller designed specifically for HD VTX. This powerful controller features an STM32F405/AT32F435 chip for high-performance calculations and a 5V 3A BEC solution for the HD VTX. It weighs only 4.2 grams and includes a Serial ELRS 2.4G receiver, 16MB Black Box, Barometer, and Current meter. Designed for HD VTX, it removes the OSD chip AT7456E and also added support for external GPS through Betaflight 4.4.0.

Bullet Point

• F4 1S 12A AIO Brushless FC V3 is specially designed for HD VTX, the MCU with stronger performance and computing power, and the new BEC solution with 5V 3A output supports HD VTX power supply.
• Integrate Serial ELRS 2.4G receiver, 16M black box, barometer, current meter, reserve 2 complete serial ports, and 1 standard SBUS. It is compatible with various devices such as GPS, HD VTX, and external receivers, which reduces the overall weight and complexity of the build.
• With a lighter weight of 4.2g, it improves flight performance and agility.
• There are 2 main control MCUs available: the STM32F405 and the AT32F435. The AT32F435 has a stronger performance, with a COREMARK score that is even comparable to that of the STM32F722.

Specification of FC

• Six-Axis: ICM42688P (SPI connection)
• MCU: STM32F405RGT6 (168MHz) / AT32F435RGT7 (288MHz)
• Firmware version: Betaflight_4.4.1_BETAFPVF405 (STM32F405) / ATBetaflight_4.3.2_BETAFPVF435_RC3 (AT32F435)
• Receiver: Serial ELRS 2.4G Receiver
• Receiver firmware version: BETAFPV AIO 2400 RX ELRS V2.5.2
• Antenna: Enameled wire
• Blackbox Memory: 16MB
• Sensor: Barometer (BMP280), Voltage&Current
• Mounting Hole Size: 26mm x 26mm (suitable for whoop pattern mounting hole)
• BEC*: 5V 2A@4V supply, 5V 3A@8V supply
• USB Port: SH1.0 4-Pin
• Built-in ESC with 12A continuous and peak 25A current
• ESC input voltage: 1-2S
• ESC firmware: C_X_70_48_V0.19.2.hex for BB51 Bluejay hardware
• Signal support: D-shot300, D-shot600
• Weight: 4.23g (without motor connectors) / 4.68g (with motor connectors), excluding power cable

*The output current of BEC will decrease as the temperature increases

Betaflight Firmware and CLI 

For STM32F405 Version

FC firmware: Betaflight_4.4.1_BETAFVF405 

Reference link:

https://github.com/betaflight/betaflight/releases/tag/4.4.1

For AT32F435 Version

FC firmware: ATBetaflight_4.3.2_BETAFPVF435_RC3

Reference link:

https://github.com/flightng/atbetaflight/releases/tag/v4.3.2-rc3

Pay attention, DO NOT flash the other firmware for AT32F435 version. Betaflight official firmware for the AT32F435 is still in the development process, only the currently released ATBetaflight 4.3.2 RC3 has bidirectional Dshot, PRM, and RGB functions.

If you need to use the Betaflight configurator, please use Betaflight_10.10.0 and follow the steps below to open the "Show all serial devices" in the "Options" first to recognize the port.

DO NOT flash the firmware with a shorter interval, otherwise, there will be a certain chance of stalling and burning the flight controller.

• ESC-Configurator: https://preview.esc-configurator.com/
• Download BLHeliSuite16714903
• Download the Bluejay ESC firmware. Please choose C_X_70.HEX

Serial ELRS 2.4G RX

Serial ELRS 2.4G RX uses the Crossfire serial protocol (CRSF protocol) to communicate between the receiver and the flight controller board. So the Serial ELRS 2.4G RX is available to support upgrading to ELRS V3 with no need to flash Betaflight flight controller firmware. 

• Enter binding status by power on/off three times.
• Plugin and unplug the flight controller three times;
• Make sure the RX LED is doing a quick double blink, which indicates the receiver is in bind mode;
• Make sure the RF TX module or radio transmitter enters binding status, which sends out a binding pulse;
• If the receiver has a solid light, it's bound.

The Serial ELRS 2.4G RX can be updated via Wi-Fi or Betaflight serial passthrough. Here is the way to update the Serial ELRS 2.4G RX firmware through passthrough.

• Plug in your FC to your computer, but do NOT connect to betaflight configurator.
• Choose target "BETAFPV 2.4GHz AIO RX". 
• Flash using the BetaflightPassthrough option in ExpressLRS Configurator.

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:  Meteor75 HD, Meteor75 Pro HD, Pavo Pico Brushless Whoop Quadcopter, 85mm whoop frame like Meteor85 HD, 3" toothpick drones
• Battery: BT2.0 450mAh 1S 30C Battery, 450mAh 2S 45C Battery
• Motor: 1102 18000KV motor, 1103 11000KV motor
• Propeller: HQ3020 2-blade Props, 2020 4-blade Props

Package

• 1 * F4 1S 12A AIO FC V3
• 4 * M2*10 machine screw 
• 4 * M2*10 nylon screw 
• 4 * M2 nuts 
• 4 * shock absorbing ball 
• 4 * JST1.25mm angle socket 
• 4 * JST1.25mm straight socket 
• 1 * SH1.0 4Pin adapter cable
• 1 * Type-C to SH1.0 adapter 
• 1 * XT30 power cord
• 1 * filter capacitor