mRo Nexus

The mRo Nexus is new member of mRo’s Pixracer autopilot family.

../_images/mro-nexus-top.png
../_images/mro-nexus-bottom.png

Overview

The mRo Nexus is a member of the next generation of mRobotics’ family of Pixracer autopilots. It has been designed for ultra compact applications which primarily use CAN peripherals, as well as standard GPS/Compass or Airspeed sensors. It includes an integrated ADS-B receiver for avoidance.

Tip

At time of writing the autopilot is still being evolved/improved. The final version may very slightly from the information provided here.

Specifications

  • Processor:
    • MCU - STM32H743VIH6
    • 2MB flash allows full features of ArduPilot to be flashed
  • Sensors
    • Gyro/Accelerometer: Invensense ICM-40609D / Gyro (? KHz)
    • Barometer: DSP310
    • RM3100 Precision Compass
  • Power
    • 5-5.5VDC from USB or PowerBrick connector. Optional/recommended ACSP4 +5V/+12V Power Supply.
    • Ultra low noise LDOs for sensors and FMU
  • Interfaces/Connectivity
    • Dual CAN/UAVCAN ports
    • MicroSD card reader
    • Micro-C USB
    • RGB LED
    • GPS (serial + I2C)
    • UART for serial RC input
    • Connectors: GPS+I2C (USART4),CAN1, CAN2, USART7 (TxD, RxD), POWER-BRICK(VDD, Voltage, Current, GND).
  • Dimensions
    • Weight ?
    • Size

Connector pin assignments

Unless noted otherwise all connectors are JST GH

UART7 connector

PIN SIGNAL VOLTAGE/TOLERANCE
1 +5V +5V
2 TX1 +3.3V/5V
3 RX1 +3.3V/5V
4 GND GND

USART4 (GPS+I2C) connector

PIN SIGNAL VOLTAGE/TOLERANCE
1 +5V +5V
2 TX +3.3V/5V
3 RX +3.3V/5V
4 SCL +3.3V/5V
5 SDA +3.3V/5V
6 GND GND

CAN1 and CAN2 connectors

PIN SIGNAL VOLTAGE/TOLERANCE
1 +5V +5V
2 CH +3.3V/5V
3 CL +3.3V/5V
4 GND GND

Power connector

PIN SIGNAL VOLTAGE/TOLERANCE
1 +5V in +5V
2 +5V in +5V
3 CURR sense in +3.3V/5V
4 VOLT sense in +3.3V/5V
5 GND GND
6 GND GND

Default UART order

Parameter Default Protocol** Connector/Suggested Use
SERIAL0 console USB
SERIAL1 Telemetry1 UART7/Serial RC input
SERIAL2 Telemetry2 USB (second composite USB interface)/SLCAN
SERIAL3 GPS1 UART4/GPS

** User may change SERIALx_PROTOCOL as required for application

Where to Buy