unu Scooter Pro - Technical Documentation

Reverse-engineered technical documentation of the unu Scooter Pro.

System Architecture

The unu Scooter Pro uses a distributed architecture with several key systems:

Core Electronics

• Middle Driver Board (MDB) - Central control system

  • Manages power distribution and system communications
  • Coordinates motor control and battery management
  • Provides cellular connectivity via SIM7100E module
  • USB gadget, connected to DBC, exposes USB Ethernet
  • Handles wakeup/sleep states

• Dashboard Controller (DBC)

  • Freescale i.MX6 processor
  • Manages display and user interface
  • NFC reader for keycard authentication
  • USB host, connected to MDB

• Electronic Control Unit (ECU)

  • BOSCH/Lingbo motor controller
    • unu 4kW: 4kW peak / 2.7kW continuous
    • unu 3kW: 3kW peak / 1.9kW continuous
  • Encrypted CAN bus communication
  • Controls motor and regenerative braking

Power Systems

• Main Battery System

  • 14s7p configuration using INR22/71-7 cells
  • 50.8V nominal, 58.2V max charging voltage
  • 35Ah/1778Wh capacity
  • NFC communication for data channel
  • LED status ring

• Auxiliary Power

  • 12V auxiliary lead-acid battery for core systems
  • DC/DC converter for system power
  • Connectivity Box Battery (CBB, Lithium-Ion) for cellular/GPS

Communication Interfaces

• Bluetooth LE - Local device connectivity

  • Service UUIDs documented in Bluetooth Docs
  • Device control and status monitoring
  • Firmware updates over BLE (OTA transfer protocol)

• Cellular - Remote connectivity

  • SIM7100E module on MDB
  • Remote diagnostics and updates
  • User app connectivity

• Redis - Internal communication

  • Runs on 192.168.7.1:6379 (MDB)
  • Inter-process communication
  • System state management
  • Full Redis documentation

Hardware Details

Detailed documentation available for:

• Electronic Systems
• Mechanical Components
• Wiring & Connectors

Software Services

The MDB runs several system services that coordinate vehicle operations. For detailed documentation of each service, see Services Documentation.

Librescoot Services

Librescoot provides open-source replacement firmware for unu Scooter Pro systems, including:

• Core System Services: alarm, battery, bluetooth, ECU, keycard, modem, power management, settings, vehicle
• Dashboard Services: backlight control, illumination monitoring
• Update Services: OTA updates, version tracking
• Communication Services: nRF52 UART protocol

For complete Librescoot service documentation, see Librescoot Services.

System States

The scooter operates in several power states:

• Hibernating
• Booting
• Stand-By
• Parked
• Ready
• Shutting Down

State transitions are triggered by:

• User actions (lock/unlock)
• Power management events
• System commands

Detailed state diagrams and transitions

Command-Line Tools

lsc - Librescoot Control CLI

lsc is a comprehensive command-line tool for controlling and monitoring Librescoot systems. It provides easy access to:

• Vehicle control (lock/unlock, hibernate)
• Service management (start/stop/logs)
• Battery and GPS monitoring
• Alarm system control
• Settings management
• OTA updates
• System diagnostics

See lsc documentation for complete command reference.

Quick examples:

lsc status              # Show overall system status
lsc lock                # Lock the scooter
lsc battery             # Show battery information
lsc svc list            # List all services
lsc svc logs vehicle -f # Follow vehicle service logs

Development Access

• MDB UART, Pin 1 = GND, Pin 2 = TXD, Pin 3 = RXD
• MDB access: 192.168.7.1
• DBC access: 192.168.7.2 - connect via SSH (root@192.168.7.2) from MDB
• Redis: 192.168.7.1:6379