Published on February 12, 2026, the entry describes open-hardware virtual-reality trackers combining IMUs, an nRF52833 wireless MCU, and a custom 2.4 GHz ESB protocol.
The February 12, 2026 entry presents SlimeVR Butterfly trackers, open-hardware devices for virtual-reality tracking. They use IMUs to measure absolute rotation and an nRF52833 wireless MCU to transmit data over a custom ESB protocol in the 2.4 GHz band.
The software stack includes firmware, a central server, and third-party integrations. The example illustrates pairing a low-power wireless MCU with a custom protocol in wearable tracking hardware. To check the details and technical context, consult the original project entry and compare the specifications and documentation published by its maintainers; this summary reports no performance measurements.