BuWizz
A battery brick that drives LEGO motors harder than LEGO's own battery box does, in three generations: the first is gone, and both the 2.0 Ludicrous and the 3.0 Pro were on sale in August 2026. It hears Bluetooth Low Energy both ways, and no generation asks for a password.
Reach
| Capability | State | Note |
|---|---|---|
| BuWizz 2 driven from the page | works | A Power Functions servo on port 1 and a motor on port 2, steering and throttle together, straight from the browser. |
| Reading back the duty the brick actually applied, BuWizz 2 status bytes 16 to 19 | works | In no published document. It answers whether the brick heard you when a motor does not move. |
| BuWizz 3 driven from the page | works, untested here | Four Powered Up ports and two Power Functions ports, same path through the page as the 2. |
| BuWizz 1 driven from the page | works, untested here | Four channels. Out of production, and the one generation the vendor never published a specification for. |
| Connecting with no password, no cloud account and no reflash | works | True of all three generations: connect, discover, write. |
| Driving a BuWizz from the bridge | out of reach | The bridge firmware speaks Powered Up only, and it filters scans on LEGO's own company id, which a BuWizz does not advertise under. |
What it hears
Bluetooth Low Energy, both ways: it accepts a connection, takes drive frames as writes on one characteristic and notifies telemetry back. BuWizz publishes its own specification, which makes it the only third-party brick here that nobody had to reverse-engineer. The service and characteristic per generation, the drive frames, the power-level command, the extended Powered Up command with its brake flags, and the port-order swap on rev-2 units of the 2 are all in Third-party hubs over Bluetooth. Every link a LEGO brick can hear, on one page: How the links work.
Reaching it today
- Flash Force in the browser: nothing to build, nothing to flash. On a BuWizz 2, set the power level before you decide a servo is dead.
- BrickController2, for the same bricks from a native app with a gamepad.
Links
- buwizz.com/support — the vendor's PDFs, and read those rather than a decompiled app: 3.0 API 3.22 · 2.0 API 1.3.
- 3.0 Pro — 4 Powered Up outputs and 2 Power Functions, 2300 mAh replaceable, $197 against a $219 list price in August 2026.
- 2.0 Ludicrous — 4 Power Functions outputs, 7.5 Wh sealed, $129 in August 2026.
- 1 — 4 outputs, gone from sale. No successor to the 3.0 announced.
- The other bricks of this kind: SBrick · Circuit Cubes · Clone hubs (Mould King · CaDA · JieStar). LEGO's own equivalent: LWP (Powered Up BLE).