Microcontroller GitHub Repositories (2026) · Open Source Tools

modm: a C++23 library generator for AVR and ARM Cortex-M devices

Sound generates the terrain, tilt shapes the world, real-world time and weather shape the sky — a tiny living world for M5Stack Cardputer ADV.

Apache NuttX is a mature, real-time embedded operating system (RTOS)

C++ port of the Reticulum Network Stack — a cryptographic mesh networking library that runs on both 32-bit+ microcontrollers (ESP32, nRF52, LoRa boards) and native platforms (Linux, macOS), with PlatformIO and CMake build support.

🟢 Ultra-fast, tiny C/C++ tracing and logging, even in interrupts ⚡, with printf-like syntax and real-time PC visualization 💻

Ariel OS is a library operating system for secure, memory-safe, low-power Internet of Things, written in Rust

Open-source circuit and MCU firmware simulator for mixed-signal co-simulation, deterministic CI, and MCP workflows. STM32, ESP32, RP2040.

Sming - powerful open source framework simplifying the creation of embedded C++ applications.