RadioMaster NEXUS-XR Helicopter Flight Controller w/ 2.4GHz ExpressLRS RX (Dual SX1281), 256MB

Overview

RadioMaster NEXUS-XR is a helicopter flight controller that integrates a 2.4GHz ExpressLRS receiver (dual SX1281) to simplify installation and reduce the need for an external receiver. It is built around an STM32F722 MCU with an ICM42688P 6-axis MEMS motion sensor, includes 256MB onboard flash for blackbox logging, and uses a CNC aluminum case for protection and cooling.

The integrated receiver is a RP4TD-M ExpressLRS 2.4GHz mini true diversity receiver with two 65mm 2.4GHz wire antennas, CRSF bus interface, WiFi updates, and a maximum refresh rate of 500Hz / F1000Hz.

Key Features

• Integrated 2.4GHz ExpressLRS receiver: Dual Semtech SX1281 (Gemini) receiver design; internal receiver listed as RP4TD-M ExpressLRS 2.4GHz mini true diversity receiver.
• Flight controller platform: STM32F722RET6 MCU + ICM42688P 6-axis MEMS; barometer SPL06-001.
• Built-in black box logging: 256MB onboard flash memory (W25N02KVZEIR).
• Servo support: S1, S2, S3, and TAIL servo outputs (up to 12V); supports both 760us and 1520us servos; compatible with tail motors.
• Power and voltage flexibility: Voltage Supply (DC) 5 - 16V; EXT voltage input (tele) 3.6-70V; A/B/C serial port power output 5V - 1.5A; isolated rails listed as 1.8V, 3.3V (MCU), and 5V (interfaces).
• Connectivity: 5 UARTs (S.BUS[UART1], TELEM[UART2], PORT-A[UART4], PORT-B[UART6], PORT-C[UART3]); RPM sensor input from ESC frequency sensor; AUX x1.
• Case and access: CNC-machined aluminum case; USB-C access supported via included USB-C extender/Type-C extension cable.
• Failsafe feature: RF Rescue listed as a standard feature.
• Optional case colors: Grey / Gold / Red / Blue / Purple.

For pre-purchase compatibility checks, wiring questions, or setup support, contact support@rcdrone.top or visit https://rcdrone.top/.

Specifications

What’s Included

• 1 * NEXUS-XR Control System
• 3 * JST-GH 4 wire pigtail cables
• 1 * JST-GH to servo plug (dupont 3 pin connector)
• 1 * Ultra light-weight and flexible USB-C extender
• 1 * Type C extension cable
• 1 * JST-ZH1.5 “DSM” telemetry cable (telemetry only; does not support DSM receivers)
• 1 * Voltage telemetry wire
• 3 * 3M double-sided mounting tape
• 2 * Heat shrink tubing
• 1 * Inventory card

Applications

• Helicopter builds requiring an integrated 2.4GHz ExpressLRS receiver (CRSF bus interface)
• Helicopter setups needing onboard blackbox logging (256MB) for tuning
• Installations requiring servo outputs up to 12V and support for 760us / 1520us servos

Related Products

• NEXUS Control System
• NEXUS-X Control System

Details

The NEXUS-XR combines a helicopter flight controller and 2.4GHz ExpressLRS receiver in one compact CNC aluminum enclosure.

Dual SX1281 (Gemini) ExpressLRS hardware is integrated to reduce wiring and eliminate the need for an external receiver in many builds.

An STM32F722 MCU paired with an ICM42688P 6-axis MEMS sensor provides the processing and motion sensing needed for stable heli control.

256MB onboard flash supports blackbox logging for tuning and troubleshooting.

A rugged CNC-machined aluminum case helps protect the electronics and improve cooling, with easy USB-C access for setup.

Servo outputs support both 760µs and 1520µs servos up to 12V, with compatibility for tail motor setups.

Skip the parts hunt: the box includes a USB-C extender, wiring leads, mounting tape, and heat shrink to speed up installation.

Clear port labeling helps with clean wiring for servos, power, telemetry, and UART accessories.