Linux kernel source tree

Display and control your Android device

Alternative firmware for ESP8266 and ESP32 based devices with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP…

Embedded graphics library to create beautiful UIs for any MCU, MPU and display type.

Espressif IoT Development Framework. Official development framework for Espressif SoCs.

Flipper Zero firmware source code

Simple DirectMedia Layer

Embedded web server, with TCP/IP network stack, MQTT and Websocket

RT-Thread is an open source IoT Real-Time Operating System (RTOS). https://rt-thread.github.io/rt-thread/

Open Source Flight Controller Firmware

An open source, portable, easy to use, readable and flexible TLS library, and reference implementation of the PSA Cryptography API. Releases are on a varying cadence, typically around 3 - 6 months …

An open source, embedded, high performance g-code-parser and CNC milling controller written in optimized C that will run on a straight Arduino

canonical libwebsockets.org networking library

Small portable AES128/192/256 in C

A Modbus library for Linux, Mac OS, FreeBSD and Windows

https://github.com/json-c/json-c is the official code repository for json-c. See the wiki for release tarballs for download. API docs at http://json-c.github.io/json-c/

STM32 core support for Arduino

ZSWatch - the Open Source Zephyr™ based Smartwatch, including both HW and FW.

Reference implementation and documentation of a LoRa network node.

Secure boot for 32-bit Microcontrollers!

Modular and configurable OS for embedded applications

The Official Arduino AVR core

A Firmware-Only USB implementation for Atmel's AVR Microcontrollers

nRF Connect SDK main repository

AT application for ESP32/ESP32-C2/ESP32-C3/ESP32-C6/ESP8266

The Open-Smartwatch Operating System.

Gpredict satellite tracking application

MiniF4-STM32F401CEU6/STM32F411CEU6 Product Literature

Lightweight USB device Stack for STM32 microcontrollers