Arduino GitHub Repositories (2026) · Open Source Tools

embedded-hal abstractions for AVR microcontrollers

Espressif 32: development platform for PlatformIO

Device OS (Firmware) for Particle Devices

ESP32/Arduino hack for the ikea OBEGRÄNSAD led wall lamp

MobiFlight is an open source project that allows you to create your own home cockpit for your favorite flight simulator in a flexible, affordable and extremely user-friendly way.

do-it-yourself, full-featured and smart wall clock device

K3NG Arduino CW Keyer

OSI Layer 7 Mesh Networking for RF24Network & nrf24L01+ & nrf52x devices

Homebrew AVR Toolchain

RFID-controlled musicplayer powered by ESP32

The Arduino Library Registry

OSI Layer 3 Networking for nRF24L01(+) and nRF52x on Arduino and Raspberry Pi

A library to make using WiFi & MQTT on the ESP8266 easy.

Library for the Si5351 clock generator IC in the Arduino environment

Transform your spin bike into a Smart Trainer!

Smart energy meter capable of monitoring up to 16 channels. Supports MQTT, REST API, Modbus TCP, InfluxDB, AWS IoT Core. Friendly UI and fully open source (PCB, schematics, components, source code)

Multilayout ESP word clock firmware for ESP8266/ESP8285/ESP32/ESP32-C3, with 35 layouts across 13 languages, WS2812/SK6812 LEDs, web configuration, display effects, auto brightness, MQTT and Home Assistant discovery.

Noodle provides primitive modular functions for convolution layer, dense layer, pooling and activations. It allows streaming the intermediate activations, weights, and biases from/to SD/FFat/SD_MMC filesystems to overcome RAM limitations.

A lightweight, low-allocation, high-performance HTTP client library for ESP32.

HomeApp is a small and easy to use smart home app with a simple framework.