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A terminal showing FlintOS booting on an ESP32 — build, flash, self-tests passing, and three preemptive tasks running.

flintOS

A preemptive real-time OS for 32-bit microcontrollers, in no_std Rust — small, layered, and AI-friendly to build on.

For users

Flash a board and run three tasks on real silicon. Start with the Quickstart.

For developers

Write a driver, add a board, understand the layer model. See Architecture.

API reference

The generated rustdoc for every crate lives at /api.

Open source

Apache-2.0 on GitHub.