Mainboard Module

Description

The Mainboard is the core of the NEXUS platform providing six extension slots for modules.

The key features are:

Software

  • NEXUS UNITY OS is based on the Raspberry Pi OS (Debian 11)
  • Supports configuration via a web application.
    • System settings and information
    • Installation of various smart home software
    • User management
  • Supports automated mass configuration and deployment
  • Bootloader & Firmware update support.
  • Programmable via the Module RESTful API
  • No vendor lock, boots Raspberry Pi Compute Module compatible software

Hardware

  • Based on the Raspberry Pi Compute Module 3+
    • Broadcom BCM2837B0, Cortex-A53 (ARMv8) 64-bit SoC @ 1.2GHz Quadcore
    • 1GB LPDDR2 SDRAM
  • 6 expansion slots each with SDBP and USB support.
  • 1 power supply expansion slot.
  • 2 microSD card slots with 32 GB storage and RAID-1 support.
    • Failsafe against microSD card wear and tear.
  • USB hub with per-port power control and overcurrent detection.
  • Supports automatic detection by the USB descriptor.
  • Integrated real-time clock (RTC) with CRC2032 battery.
  • Serial console via USB Type-C port.
    • Supports USB mass storage mode “boot and rest after timeout” for easy data access.
  • Buzzer for simple audio signals
  • HDMI 1.2 output
  • IEC/EN 60715 – 35 (35mm DIN rail) mounting options
  • Baseboard Management Controller (BMC)
    • Watchdog function
    • Supports low level configuration of USB hub
    • On-board voltage measurement
    • 2 temperature sensors (free ambient / SoC ambient temperature)
    • tactical hardware switch for factory reset and booting in USB mass-storage mode boot
    • 3 hidden switches (requires screw driver for switching)
      • BMC write protection on/off
      • BMC bootloader enable on/off
      • RTC battery connected/disconnected

Important notes

  • Device is configured via serial console (USB Type C) (no keyboard/mouse support).
  • HDMI is supported by hardware and drivers, but no default application is provided.
Info
Release date 2021-08-01
Current hardware version
Current firmware version
Firmware last updated
Bootloader support yes
Protocol USB-2.0-480Mbit, SDBP-1.0.0
Dimensions 208x125x20mm (LxWxH)
Github Github logo
Product information last updated 2021-09-22
Version Release date Changelog
Version Release date Changelog