Matrix 1S 3IN1 HD Brushless Flight Controller – Perfect for Whoops

The Matrix 1S 3IN1 HD Brushless Flight Controller is purpose-built for 1S HD Whoops, featuring the iconic "cross" design. Engineered exclusively for digital FPV, it eliminates analog OSD, integrating a flight controller, ESC, and ELRS 2.4G RX into one lightweight, streamlined unit for effortless setup and maintenance. Equipped with newly developed BEC and ESC, it’s finely tuned to meet the demands of 1S HD Whoops, delivering superior digital image transmission and setting a new standard in 1S HD flight controllers.

Note: Stay tuned for our upcoming 4IN1 version with the analog OSD integrated.

Attention

• Flight controllers are covered for manufacturer defects. Issues arising from user errors, physical crash damage, damage during installation or dismantling, modifications, power surges, electrical fires, or water exposure are not covered.

Bullet Points

• Optimized for 1S Whoops: Designed to enhance performance with the DJI O4 digital transmission system.
• Three-in-One Integration: Combines flight controller, ESC, and ELRS 2.4G RX into a compact unit, focusing exclusively on high-quality digital FPV by eliminating analog OSD.
• Stable HD Video Transmission: Features a newly developed BEC to ensure consistent power delivery for seamless HD performance.
• Enhanced Overcurrent Capacity: Supports 12A continuous current and 18A peak ESC, providing robust performance for demanding flights.
• Reliable Precision: Includes an independent 3.3V LDO design to deliver stable, interference-free power directly to the IMU for accurate control.
• Effortless Setup: Equipped with convenient motor plugs and a SH1.0-6Pin HD digital port for a solder-free, hassle-free installation and maintenance experience.

Specifications

FC

• MCU: STM32G473CEU6 (168MHz)
• Gyro: ICM42688P
• Blackbox memory: 16MB
• Sensor: Voltage & Current
• BEC: 5V/3A
• UART: UART 1 (RX Only/SBUS), UART 2 (Free), UART 3 (For RX), UART 4 (Free/HD MSP)
• ESC: 12A continuous
• RX: Serial ELRS 2.4GHz (V3.4.3)
• FC firmware: Betaflight_4.5.1_BETAFPVG473
• USB port: SH1.0-4Pin
• HD Digital VTX Port: SH1.0-6Pin
• Motor plug: JST1.25-3Pin
• Battery connector: BT2.0
• Mounting size: 25.5mm x 25.5mm
• Weight: 3.2±0.1g (battery connector excluded), 4.2±0.1g (battery connector included)

ESC

• Power input: 1S Only
• Current: 5A continuous, 8A peak
• ESC firmware: A_X_5_96KHz_V0.19.hex for BB51 Bluejay firmware
• Digital signal protocol: DShot300, DShot600

Firmware Update for Serial ELRS 2.4G RX

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 Betaflight Passthrough option in ExpressLRS Configurator.

Note: How to flash firmware via Wi-Fi is explained separately.

Betaflight Firmware and CLI

Betaflight official developers recommend using version 42688 of the gyroscope, and many issues with ICM42688 have been fixed in version 4.5.0. Please learn more from version 4.5.1.

• FC firmware: Betaflight_4.5.1_BETAFPVG473, download the firmware and CLI dump file.
• Reference link: Version 4.5.1 on GitHub.

Bluejay ESC Firmware

With BB51 ESC solution, the Matrix 1S 3IN1 HD Brushless Flight Controller is based on A_X_5_96_v0.19.2.hex for BB51 Bluejay firmware. It supports DSHOT300, DSHOT600, and even RPM filtering in Betaflight, offers 24KHz, 48KHz, and 96KHz fixed PWM frequency options, and custom start-up melodies.

IMPORTANT: 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: Available online.
• Download BLHeliSuite16714903.
• Download the Bluejay ESC firmware, please choose A_X_5_96_v0.19.2.hex.

How to Use Serial Ports, Integrated RX, and VTX

UART3 is connected to the built-in Serial ELRS RX. To release UART3, please remove the resistor. Additionally, this FC reserves 2 complete full-featured serial ports that can be used for external serial receivers, GPS, HD VTX, or other serial devices. You can refer to the picture below.

Recommended Parts

• Drones: Meteor65 Pro O4, Meteor75 Pro O4
• Frames: Meteor65 Pro Frame, Meteor75 Pro Frame
• Motors: 0802SE Motor, 1102 Motor
• Propellers: GF 35mm 3-Blade, GF 45mm 3-Blade

Package

• 1 * Matrix 1S Brushless Flight Controller (3IN1 HD)
• 1 * Type-C to SH1.0 Adapter
• 1 * SH1.0-4Pin Adapter Cable
• 1 * SH1.0-6Pin Adapter Cable
• 4 * M1.2*4 Self-tapping Screws
• 4 * M1.4*5 Self-tapping Screws
• 4 * Shock Absorbing Balls