RadioMaster NEXUS-X Helicopter Flight Controller for Rotorflight 2.2 - STM32F722, 256MB Blackbox, CNC Case
RadioMaster NEXUS-X Helicopter Flight Controller for Rotorflight 2.2 - STM32F722, 256MB Blackbox, CNC Case
RadioMaster
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Overview
The RadioMaster NEXUS-X is a helicopter flight controller specifically designed for RF 2.2, focusing on compatibility, stabilization performance, and clean installation. It uses an STM32F722 MCU with an ICM42688P 6-axis MEMS motion tracker and includes an upgraded 256MB onboard Black Box for extended data logging and tuning.
The controller provides multi-function UART connectivity for a wide range of receiver protocols, and supports Plug’n’Play solder-free RP3-H ExpressLRS receivers (receiver sold separately). A CNC-machined aluminum case helps protect the electronics while acting as a heat sink, and USB-C access is supported via an included extender for tight builds.
Key Features
- Designed for RF 2.2 compatibility
- MCU: STM32F722
- Gyro/IMU: ICM42688P 6-axis MEMS
- Built-in Black Box with 256MB onboard flash memory
- CNC aluminum case for protection and cooling
- Multi-function UART ports for receiver and peripheral integration
- Receiver support: CRSF, ELRS, GHOST, S.BUS, SUMD, IBUS, XBUS, EXBUS, PPM, MSP
- Plug’n’Play connector support for RP3-H ExpressLRS receivers (sold separately)
- Servo outputs: S1, S2, S3, TAIL (up to 12V)
- Supports tail servo and tail motor
- USB-C interface and FC-Boot access
- RF Rescue feature
- Optional case colors: Grey / Gold / Red / Blue / Purple
Specifications
| Item | NEXUS-X Control System / NEXUS-X Helicopter Flight Controller |
| Firmware | RF 2.2 / Rotorflight 2.2 |
| MCU | STM32F722RET6 |
| Gyro (IMU) | ICM42688P |
| Flash Memory (Black Box IC) | 256MB (W25N02KVZEIR) |
| Barometer | SPL06-001 |
| UART | 5 - S.BUS [UART1], TELEM [UART2], PORT-A [UART4], PORT-B [UART6], PORT-C [UART3] |
| Servo Outputs | S1, S2, S3, TAIL servos (up to 12V) |
| Support Tail ESC | 760us / 1520us Servo |
| Support Tail Motor | Yes |
| PWM Protocols | PWM, Oneshot, Multishot, Dshot |
| RPM Sensor | 1 - from ESC frequency sensor |
| AUX | 1 |
| Ext voltage input (tele) | 3.6-70V |
| Voltage Supply (DC) | 5-16V |
| A-B-C Serial Port Power Output | 5V - 1.5A |
| Telemetry | S.BUS, HoTT, S.Port, MSP, EDGETX, ELRS |
| Dimensions | 44.70 x 26.50 x 12.30mm |
| Weight | 20.6g |
What’s Included
- 1 x NEXUS-X Control System
- 3 x JST-GH 4-wire pigtail cables
- 1 x JST-GH to servo plug (Dupont 3-pin connector)
- 1 x Ultra light-weight and flexible USB-C extender
- 1 x Type-C extension cable
- 1 x JST-ZH1.5 “DSM” telemetry cable (telemetry only; does not support DSM receivers)
- 1 x Voltage telemetry wire
- 3 x 3M double-sided mounting tape
- 2 x Heat shrink tubing
- 1 x Inventory card
Applications
- Helicopter builds using RF 2.2 / Rotorflight 2.2
- Setups requiring onboard Black Box logging for tuning
- Receiver integrations using CRSF, ELRS, S.BUS, and other supported protocols
For installation and wiring questions, contact support@rcdrone.top or visit https://rcdrone.top/.
Details
Purpose-built for Rotorflight 2.2, NEXUS-X combines a compact layout with clean USB-C access for easy setup and tuning.
An STM32F722 processor paired with the ICM42688P 6-axis IMU delivers fast stabilization response and consistent flight feel.
Expanded 256MB onboard Black Box memory captures longer logs for troubleshooting, tuning, and performance reviews.
The CNC-machined aluminum housing helps protect the electronics while acting as a heat sink in tight helicopter frames.
Key specs at a glance help confirm receiver support, UART mapping, power input range, and telemetry options before install.
A 44.7 × 26.5 × 12.3 mm footprint keeps the controller easy to fit while retaining full connectivity.
Everything needed for a neat build is included, from JST-GH harnesses and a USB-C extender to mounting tape and heat-shrink.
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