BetaFPV Matrix 1S brushless flight controller (4-in-1)

BetaFPV Matrix 1S Brushless Flight Controller (4IN1)

The BetaFPV Matrix 1S Brushless Flight Controller (4IN1) is built for analog 1S whoops that need clean wiring, dependable power delivery, and sharp flight performance. Designed around the iconic cross layout, this board combines a flight controller, 4-in-1 ESC, built-in OSD, and support for an external analog VTX, making it a great choice for pilots who want a compact, capable setup without compromising on tuning or reliability.

Powered by the STM32G473 MCU, the Matrix 1S 4IN1 delivers significantly faster processing than older F411-based boards, helping you get a more responsive feel in the air. With a reinforced 12A ESC, peak current up to 18A, a newly developed 5V BEC, and dedicated 3.3V LDO power for the IMU, this FC is engineered to keep your 1S whoop smooth, stable, and ready for demanding freestyle sessions.

Key Features

• Purpose-built 4IN1 design for analog FPV: integrated FC + ESC + built-in OSD with solder pads for an external analog VTX.
• High-performance STM32G473 MCU: up to 55% faster processing than F411-based boards for quicker response and more precise tuning.
• Reinforced 12A ESC: supports 12A continuous current and 18A peak current for confident 1S power delivery.
• Stable 5V / 3A BEC: newly developed power system helps maintain reliable operation under demanding conditions.
• Dedicated IMU power supply: separate 3.3V LDO reduces interference and improves flight precision.
• Analog-ready layout: external VTX solder pads allow flexible analog builds and cleaner video integration.
• Built-in OSD: onboard AT7456E OSD for essential flight data in analog setups.
• Integrated ELRS 2.4GHz receiver: serial receiver onboard for a clean, lightweight build.
• Whoop-friendly mounting: 25.5 x 25.5 mm mounting pattern fits many popular 1S whoop frames.
• BT2.0 battery connector: optimized for modern 1S whoop power setups.

Important Notes

• Designed with beginners and casual pilots in mind, the Matrix FC features a durable 1 mm PCB for improved toughness and a user-friendly platform that makes setup easier. If you are chasing the lightest possible race-focused build, BetaFPV’s Air FC may be a better fit.
• Flight controllers are covered for manufacturing defects only. Damage caused by user error, crashes, installation or removal, modifications, voltage spikes, electrical fire, or water exposure is not covered by warranty.

Specifications

Flight Controller

• MCU: STM32G473CEU6 (168 MHz)
• Gyroscope: ICM42688P
• Blackbox memory: 16 MB
• Sensors: voltage and current
• BEC: 5V / 3A
• UART: UART1 (for VTX), UART2 (free), UART3 (for RX), UART4 (not available)
• ESC: 12A continuous
• Receiver: serial ELRS 2.4GHz (V3.4.3)
• FC firmware: Betaflight_4.5.2_BETAFPVG473_V2
• USB port: SH1.0-4Pin
• OSD: AT7456E
• Motor connector: JST1.25-3Pin
• Battery connector: BT2.0
• Mounting pattern: 25.5 mm x 25.5 mm
• Weight: 3.6±0.1 g (without connector), 4.6±0.1 g (with connector)

ESC

• Input power: 1S only
• Current: 12A continuous, 18A peak
• ESC firmware: A_X_5_96_v0.19.2.hex for BB51 Bluejay
• Digital signal protocol: DSHOT300, DSHOT600

Board Overview

BetaFPV Matrix 1S Brushless Flight Controller (4IN1):

Ultra-Durable BEC

1S whoops often dip to very low voltage during aggressive flying, and that puts extra stress on the onboard power system. The Matrix 1S 4IN1 uses a newly developed BEC designed to provide stable output even in tough low-voltage situations, helping maintain reliable video transmission and overall system stability when it matters most.

Reinforced 12A ESC

Whether you are building a lightweight cruiser or a punchy analog freestyle whoop, dependable ESC performance is a must. This board features a robust 12A continuous / 18A peak ESC on a proven cross-style layout, delivering solid thrust handling, improved reliability, and smoother performance on 1S brushless builds.

Dedicated IMU Power

Unlike shared-power designs, the Matrix 1S FC uses an independent 3.3V LDO exclusively for the IMU. This helps reduce noise and interference, creating a cleaner operating environment for the gyro and improving precision, responsiveness, and overall flight consistency.

Whoop-Ready Installation

The 4IN1 version keeps dedicated solder pads for an external analog VTX, giving you more flexibility when choosing your video system and helping reduce voltage-related interference for a cleaner analog image.

Built-in ELRS 2.4GHz Serial Receiver

The onboard ELRS 2.4GHz serial receiver communicates with the flight controller using the CRSF protocol, giving you a clean wiring setup and modern radio link performance. It supports updates to ELRS V3.0 without requiring Betaflight firmware reflashing.

• To enter binding mode, power the flight controller on and off three times.
• Check that the RX LED is flashing quickly in a double-blink pattern to confirm bind mode.
• Put your RF TX module or radio transmitter into bind mode and send the bind pulse.
• A solid receiver light indicates successful binding.

The ELRS 2.4GHz serial receiver can be updated over Wi-Fi or through Betaflight serial passthrough.

• Connect the FC to your computer and use ExpressLRS Configurator instead of Betaflight Configurator.
• Select the target: BETAFPV 2.4GHz AIO RX.
• Flash the firmware using the Betaflight Passthrough option in ExpressLRS Configurator.

Betaflight Firmware and CLI

The Matrix 1S 4IN1 uses the following FC firmware:

• FC firmware: Betaflight_4.5.2_BETAFPVG473_V2

Important:

• Matrix 1S 3IN1 and 4IN1 use different firmware versions. Always verify your board version before flashing to avoid compatibility or performance issues.

Bluejay ESC Firmware

Thanks to the BB51 ESC solution, the Matrix 1S series supports Bluejay firmware with the file A_X_5_96_v0.19.2.hex. It supports DSHOT300, DSHOT600, RPM filtering in Betaflight, fixed PWM frequencies at 24KHz, 48KHz, and 96KHz, plus custom startup melodies.

Do not flash firmware repeatedly in short intervals, as this may risk freezing or damaging the flight controller.

Serial Ports, Built-in RX and VTX Usage

UART3 is connected to the built-in ELRS serial receiver. If you need to free UART3, the resistor must be removed. In addition, the Matrix 1S FC keeps two full serial ports available for external serial receivers, GPS, HD VTX systems, or other serial devices.

BetaFPV Matrix 1S Brushless Flight Controller (4IN1):

What’s Included

• 1 x Matrix 1S Brushless Flight Controller (4IN1)
• 1 x Type-C to SH1.0 adapter
• 1 x SH1.0-4Pin adapter cable
• 4 x M1.2*4 self-tapping screws
• 4 x M1.4*5 self-tapping screws
• 4 x shock-absorbing balls