SBrick
SBrick is Vengit's Bluetooth battery brick, a replacement for the Power Functions battery box with four outputs for Power Functions motors, sold from 2014 until production stopped in July 2024. It hears Bluetooth Low Energy and no infrared at all, the same radio link as BuWizz and Circuit Cubes.
Reach
| Capability | State | Note |
|---|---|---|
| Four Power Functions outputs over radio | works, untested here | one write to the quick-drive characteristic moves all four channels |
| Connect with no password and no account | works, untested here | connect, discover, write; the brick asks for nothing |
| Battery voltage read back | works, untested here | one write to the control characteristic, two bytes back |
| Driven from the Flash Force page | works, untested here | the brick is in the vendor table and on the shelf; nothing here has been switched on |
| Driven from the bridge | works, untested here | same vendor table in the firmware, never against a brick |
| Vengit cloud profiles | out of reach | the profile server is down and took users' saved profiles with it |
| sbrick.com over HTTPS | out of reach | certificate expired 6 April 2026 |
What it hears
Bluetooth Low Energy, both ways, with nothing asked of the caller before it will listen. The motors sit behind one characteristic and the housekeeping, voltage and configuration, behind a second. The Power Functions name is about the sockets and the motors: no infrared remote ever reaches this brick, and no light does either. Service identifiers, the quick-drive byte layout and the battery formula: Third-party hubs over Bluetooth.
Reaching it today
A second-hand brick still works completely. The quick-drive path needs no password and no cloud, so nothing that died with the server touches a brick already in hand. It is a rescue, not a purchase: do not buy one new.
- Flash Force, from a browser with Web Bluetooth. The brick goes on the shelf and its four outputs take controls like any other port.
- BrickController2, which is where the protocol was worked out. Its forks add an SBrickLight type.
- The bridge, which carries the same vendor table, so a profile can drive the brick with no phone in the loop.
Links
- Vengit's 2024 notice — the end of production and the shutdown of the profile server. It stood on sbrick.com, which no longer serves over HTTPS.
- Reverse-engineered and implemented in BrickController2.
- Packet formats for all four Bluetooth brands: Third-party hubs over Bluetooth.
- The third-party brick still sold, and the only one that publishes its own specification: BuWizz. LEGO's own radio link: LWP (Powered Up BLE).