Product overview
The RadioMaster NEXUS-XR combines flight control electronics and an ExpressLRS receiver in a compact aluminum enclosure. Its STM32F722RET6 controller works with an ICM42688P six-axis motion sensor, while the integrated RP4TD-M receiver uses an ESP32 and two SX1281 RF chips. Two 65mm wire antennas provide the receiver’s antenna arrangement. The CNC-machined case also acts as a heat sink. At 44.70 x 26.50 x 14.30mm and 24.1g, the unit provides concrete dimensions and mass for planning installation space.
Integration connections include five UARTs, S1/S2/S3 and tail servo connections, one AUX connection and an RPM input from an ESC frequency sensor. Servo support extends up to 12V. Electrical planning must distinguish the 5–16V DC supply from the 3.6–70V external voltage telemetry input; the A-B-C serial ports provide 5V at 1.5A. Dedicated internal power supplies separate the MCU and interface rails. RF 2.2 firmware and 256MB black box storage support control configuration, logging and tuning.
The supplied configuration consists of the flight controller and installation accessories. It includes three JST-GH four-wire pigtails, a JST-GH servo adapter, a flexible USB-C extender, a Type C extension cable and a voltage telemetry wire. Three pieces of double-sided mounting tape and two pieces of heat shrink tubing support installation. The included JST-ZH1.5 “DSM” cable has a specific limitation: it carries telemetry only and does not support DSM receivers. The internal receiver supports Wi-Fi updates and a CRSF bus interface.
Specifications
| Specification | Value & conditions |
|---|---|
| Integrated ExpressLRS receiver | Integrated receiver with dual Semtech SX1281 2.4GHz transceivers; no external receiver required. |
| Data logging | 256MB onboard flash memory for logging and tuning. |
| Dual antenna design | Two 65mm wire antennas. |
| 12V servo support | Supports 12-volt servos. |
| External input voltage range | 3.6V–70V.External power input. |
| Isolated power supplies | Dedicated 1.8V, 3.3V (MCU), and 5V (interfaces) supplies to minimize noise. |
| Firmware | RF 2.2. |
| Flight controller MCU | STM32F722RET6. |
| Black box flash memory | 256MB (W25N02KVZEIR). |
| Barometer | SPL06-001. |
| UART interfaces | 5: S.BUS[UART1], TELEM[UART2], PORT-A[UART4], PORT-B[UART6], PORT-C[UART3]. |
| Servo connections | S1, S2, S3 and TAIL servos.Servos up to 12V. |
| RPM sensor input | 1.From ESC frequency sensor. |
| AUX | 1. |
| Telemetry voltage input | 3.6-70v.External voltage telemetry input. |
| Supply voltage | 5 - 16V.DC supply. |
| Serial port power output | 5V - 1.5A.A-B-C serial ports. |
| Internal receiver model | RP4TD-M ExpressLRS 2.4GHz Mini True Diversity Receiver. |
| Receiver MCU | ESP32.Internal RP4TD-M receiver. |
| RF chips | SX1281 x 2.Internal RP4TD-M receiver. |
| Receiver antennas | 65mm 2.4GHz wire antenna x 2.Internal RP4TD-M receiver. |
| Frequency range | 2.4GHz.Internal RP4TD-M receiver. |
| Maximum refresh rate | 500Hz / F1000Hz.Internal RP4TD-M receiver. |
| Telemetry RF power | Max 2 x 10mW.Internal RP4TD-M receiver. |
| Firmware target | RadioMaster RP4TD-M 2400 RX.Internal RP4TD-M receiver. |
| Dimensions | 44.70 x 26.50 x 14.30mm. |
| Weight | 24.1g. |
| Motion sensor and enclosure | ICM42688P 6-axis motion sensor/accelerometer; CNC-machined aluminum case serving as a heat sink. |
| Supported protocols and receiver interfaces |
|
| Supplied configuration | 1 NEXUS-XR flight controller; 3 JST-GH 4-wire pigtail cables; 1 JST-GH to servo plug with Dupont 3-pin connector; 1 lightweight flexible USB-C extender; 1 Type C extension cable; 1 JST-ZH1.5 "DSM" telemetry cable; 1 voltage telemetry wire; 3 pieces of 3M double-sided mounting tape; 2 pieces of heat shrink tubing; 1 inventory card.Included JST-ZH1.5 "DSM" cable is for telemetry only and does not support DSM receivers. |
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