RadioMaster NEXUS-XR Helicopter Flight Controller with 2.4GHz ELRS Receiver

The RadioMaster NEXUS-XR is a flybarless flight controller for collective-pitch RC helicopters running Rotorflight, with an ELRS 2.4GHz true-diversity receiver built in, so there is no separate receiver to mount or wire. An STM32F722, ICM42688P 6-axis gyro, barometer and 256 MB blackbox sit inside a CNC aluminium case that also works as a heat sink.

Key features

• Internal RP4TD-M receiver: dual SX1281 radios, two 65 mm antennas, 500 Hz and F1000 Hz packet rates

• Four servo outputs (S1, S2, S3 and tail) with 12 V servo support

• Five UARTs supporting CRSF, SBUS and other receiver and telemetry protocols

• 3.6–70 V external voltage input for battery telemetry, plus an RPM sensor input from the ESC

• Isolated 1.8 V, 3.3 V and 5 V supplies; USB-C on a flexible extender

Specifications

• Firmware: Rotorflight RF 2.2

• MCU: STM32F722RET6 (receiver MCU: ESP32)

• Gyro: ICM42688P

• Barometer: SPL06-001

• Blackbox: 256 MB

• UARTs: 5 (S.BUS, TELEM, PORT-A, PORT-B, PORT-C)

• Supply voltage: 5–16 V DC

• Serial port power: 5 V, 1.5 A

• Receiver protocols: CRSF, ELRS, GHOST, S.BUS, SUMD, IBUS, XBUS, EXBUS, PPM, MSP

• Telemetry: S.BUS, HoTT, S.Port, MSP, EdgeTX, ELRS

• Receiver telemetry power: 2x 10 mW

• Dimensions: 44.7 x 26.5 x 14.3 mm

• Weight: 24.1 g

Choose from Grey, Blue, Red, Gold or Purple cases; the electronics are identical. Power it from the helicopter's ESC BEC or a separate regulator within the 5–16 V supply range, and bind it to an ELRS 2.4GHz transmitter on a compatible firmware version.