4× LPF2 ports
Drive LEGO motors and read sensors on four Powered Up ports.
LEGO® Powered Up compatible hub
B2OP Hub
A custom ESP32-S3 hub speaking LEGO Power Functions 2. Program it in MicroPython, drive real LEGO motors, emulate an official hub, or build something entirely new.
What it does
Hub emulation
Pretends to be an official hub so the LEGO app can connect and control it.
Control other hubs
Talk to other LPF2 hubs as a client — chain devices together.
I²C expansion
Extra I²C port for sensors, displays, and custom peripherals.
160×128 LCD
On-board ST7735 screen driven by LVGL, scriptable from MicroPython.
MicroPython
Write your logic in Python. The lpf2 and lvgl modules are built in.
Open-source pieces
The hub itself is a personal project, but the LPF2 protocol layer and its Python bindings are open-source and reusable.
Get started
Firmware notes, wiring and API reference all live in the docs. Source is browsable in the web IDE.