unu Scooter Pro · Parts

Parts, Tools, Docs

A curated selection with sources from the community. Most links were shared on Discord; many AliExpress sources have a limited shelf life in practice, so if something no longer works, ask in the Discord.

A separately maintained community spreadsheet exists with additional entries.

SIM and connectivity

The original unu SIM soldered into the scooter (MFF2 format) has been inactive since the bankruptcy. A new SIM needs to be soldered in for Sunshine, OTA updates, or online map data.

• SIM adapter (rescoot). Adapter board soldered in place of the MFF2 SIM, providing a Nano-SIM slot. Available on request via the Discord.
• MFF2 prepaid SIM (alternative). For anyone who wants to solder in a new MFF2 SIM directly without an adapter: mdex or Conekkt are starting points.
• SIM card connector (DIY). For building your own adapter: GCT SIM8070 (Mouser).
• Reference design. Particle's mff2-to-4ffnano on GitHub as inspiration.

Batteries

• AUX battery (LiFePO4 variant). Replacement for the frequently defective AUX onboard battery. Community recommendations: LiFePO4 12 V 7 Ah or an alternative LiFePO4 variant.
• AUX battery (lead-AGM). Classic variant (Faston 6.3 mm, 12 V): EMOS or Tecnoware.
• Main battery (used). Occasionally available on Kleinanzeigen. Be careful when buying batteries; serial numbers can be checked for plausibility in the Discord.
• Battery charger (DIY). A 3D-printed enclosure for custom charger builds, plus matching battery contacts.

Mirrors, reflectors, helmet

• Mirror set (long-stem). Different from the original, but functional. Set of two: AliExpress.
• License plate reflector. Replacement for the reflector on the license plate bracket: eBay.
• Helmet. A community example: MTR Jet Fiber Jethelm at Louis. Helmet choice is personal, of course.

Service tools

Anyone working on the scooter will eventually need a few standard tools for diagnostics, flashing, and bus sniffing.

• UART adapter (3.3 V). For communication with MDB and DBC: Amazon. Important: 3.3 V, not 5 V.
• Mini-USB cable. For the MDB: Amazon.
• Test pins. For pogo testing on the open board: Amazon.
• NFC module (PN532). For keycard research: Amazon.
• Atmel-ICE adapter. For deeper debugging on the nRF52840: Farnell.

3D-print models

Several community models make repairs, modifications, and workshop setup easier:

• MDB dev case. Reduced base plate with reversed spacers so the MDB can be used without its enclosure.
• MDB enclosure with PCB model.
• Gasket for the MDB USB port.
• Bag hook with USB-C (Tinkercad source also available).
• Enclosure for a custom charger.
• Extended pogo test clamp for workshop setups.

Documentation and guides

• unu Scooter Pro Repair Manual (English, PDF). Original workshop manual with disassembly and assembly instructions.
• Extended workshop material. A community-assembled collection.
• librescoot Tech Reference. Hardware pinouts, bus protocols, service setup.
• reunu/tech-reference. Wiring, power management, earlier reverse-engineering results.
• reunu/mdb. Flashing the MDB, service scripts, modem configuration.
• BMX055 datasheet. Motion sensor on the MDB (relevant for the alarm system).

Notes

This list grows over time and through contributions from Discord. To add a source or flag an outdated one, head to the Discord or open a pull request on GitHub.