Matrix 1S Brushless Flight Controller (5IN1 II)

BETAFPV Matrix 1S 5in1 II Brushless Flight Controller (Solder-Free) ELRS 5A AIO

The BETAFPV Matrix 1S 5in1 II is a compact, solder-free AIO flight controller designed to make building and repairing tiny whoops faster and easier. With a built-in ELRS receiver, 5A ESC, and plug-and-play motor connections, it removes the need for soldering while keeping performance reliable for everyday flying.

Product Hightlight’s

• Solder-free motor connections for quick setup and repairs
• 5in1 AIO design with FC, ESC, and ELRS receiver
• Built-in ELRS receiver for stable control and range
• 5A ESC suitable for 1S brushless whoop setups
• Compact and lightweight design
• Clean layout reduces wiring and build time

 

Product Information

FC

• MCU: STM32G473CEU6
• Gyro: ICM42688P
• Blackbox memory: 16MB
• Sensor: Voltage & Current
• BEC: 5V, Max 3A
• UART: UART 1, UART 2 (For VTX), UART 3 (For RX), UART 4
• BetaFlight OSD: AT7456E
• ESC: 12A continuous
• RX:Serial ELRS 2.4GHz (V3.4.3)
• VTX: 5.8GHz 48 channels, Max 400mW
• FC firmware: Betaflight_4.5.3_BETAFPVG473_V2
• USB port: SH1.0-4Pin
• Motor connector: JST1.25
• Battery connector: BT2.0
• Mounting hole size: 26mm x 26mm
• Weight: 4.1±0.1g (solder-free), 3.76g (soldered-required)

ESC

• Power input: 1S Only
• Current: 12A continuous, 18A peak
• ESC firmware: A_X_5_96KHz_V0.19.hex for BB51 Bluejay firmware
• Digital signal protocol: DShot300, DShot600

VTX

• Output power: 25/100/200/400/PIT
• Frequency: 5.8GHz 48 channels, with Raceband: 5658~5917MHz
• Channel SEL: SmartAudio2.0
• Modulation type: FM
• Frequency control: PLL
• All harmonic: Max -50dBm
• Frequency stability: ±100KHz (Typ.)
• Frequency precision: ±200KHz (Typ.)
• Channel carrier error: ±1.5dB
• Antenna port: 50 Ω
• Operating temperature: -10℃~80℃

 

Why Choose This Flight Controller?

If you have ever replaced a whoop motor or rebuilt a small quad, you will know how fiddly soldering can be. The Matrix 1S 5in1 II removes that hassle with plug-in motor connections, making it ideal for beginners, quick repairs, or anyone who wants a cleaner build.

It is also a solid option for regular pilots who want to reduce downtime and keep their fleet flying without dragging out the soldering iron every time.

Performance and Compatibility

This AIO combines a flight controller, 5A ESC, and ELRS receiver into a single board, making it perfect for 1S tiny whoop builds. It is designed to work with standard 1S brushless motors and common whoop frames.

The built-in ELRS receiver provides reliable control and removes the need for external receiver wiring, keeping the build simple and lightweight.

Real World Use

This flight controller is ideal for tiny whoop pilots who want a simple, reliable setup without the hassle of soldering. Whether you are building your first quad or maintaining a fleet of whoops, it keeps things quick, clean, and easy to work on.

Notes

Designed for 1S brushless setups only. Always check motor connector compatibility before installation. Suitable for beginners and experienced pilots looking to simplify builds and reduce repair time.

In the Box

Matrix 1S 5IN1 II Brushless Flight Controller (Solder-free Version)

• 1 * Matrix 1S 5IN1 II Brushless Flight Controller (Solder-free Version)
• 1 * Type-C to SH1.0 Adapter
• 1 * SH1.0-4Pin Adapter Cable
• 1 * 5.8G Antenna
• 4 * M1.2*4 Self-tapping Screws
• 4 * M1.4*5 Self-tapping Screws
• 4 * Shock Absorbing Balls

More Information

Diagram

Matrix 5IN1 II vs. Matrix 5IN1 vs. Air 5IN1

All three flight controllers share the same core MCU, OSD, RX, and VTX. The Matrix 5IN1 II is the next-generation balance, blending the durable 1mm-thick board and larger solder pads of the Matrix series with a remarkably lightweight design—adding only 0.16g compared to the Air 5IN1. It stands out with its 12A continuous (18A peak) ESC, gold-plated connectors, and three-point mounting, delivering superior power and the most robust crash protection for high-performance builds.

	Matrix 5IN1 II	Matrix 5IN1	Air 5IN1
MCU	STM32G473CEU6
OSD	BetaFlight OSD: AT7456E
Blackbox Memory	16M
RX	Onboard serial ELRS 2.4GHz
VTX	Onboard 5.8GHz 48 channels, 400mW
Circuit Board Thickness	1.0mm		0.8mm
ESC	1S, 12A	1S, 5A	1S, 5A
Motor Connector	Gold plated JST1.25	JST1.25	–
Weight (VTX antenna excluded)	4.13g (solder-free) 3.76g (solder-required)	3.92g	3.60g

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 V3.0 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, connect to ExpressLRS Configurator instead of Betaflight Configurator;
• Choose target “BETAFPV 2.4GHz AIO RX”;
• Flash using the BetaflightPassthrough option in ExpressLRS Configurator.

How to flash firmware via Wi-Fi here.

Betaflight Firmware and CLI

Betaflight official developers recommend using version 42688 of the gyroscope, and many issues with ICM42688 have been fixed in version 4.5.3. Please learn more from version 4.5.3.

• FC firmware: Betaflight_4.5.3_BETAFPVG473_V2, download the firmware and CLI dump file
• Reference link: https://github.com/betaflight/betaflight/releases/tag/4.5.3

Bluejay ESC Firmware

With BB51 ESC solution, Matrix 1S Brushless Flight Controller is based on A_X_5_96KHz_V0.19.hex for BB51 Bluejay hardware, it supports D-shot300, D-shot600, and even RPM filtering in Betaflight, offers 24KHz, 48KHz, and 96KHz fixed PWM frequency for options, and custom start-up melodies.

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 A_X_5_96KHz_V0.19.hex

How to Use Serial Ports, Intergrated RX and VTX

Please note that by default, UART2 is connected to the VTX and UART3 is connected to the RX. To release UART3, please remove the resistor. Additionally, this FC reserves 2 complete full-featured serial ports that can be used for external CRSF/SBUS receivers, GPS, HD VTX, or other serial devices. You can refer to the below pictures.