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

• 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