Arduino Open Source Projects

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, Serial or KNX. Full documentation at

Go compiler for small places. Microcontrollers, WebAssembly (WASM/WASI), and command-line tools. Based on LLVM.

Marlin is a firmware for RepRap 3D printers optimized for both 8 and 32 bit microcontrollers. Marlin supports all common platforms. Many commercial 3D printers come with Marlin installed. Check with your vendor if you need source code for your specific machine.

Arduino core for the ESP32 family of SoCs

ESP8266 core for Arduino

Affordable WiFi hacking platform for testing and learning

Arduino IDE 1.x

JavaScript Robotics and IoT programming framework, developed at Bocoup.

How to be low-level programmer

A suite of WiFi/Bluetooth offensive and defensive tools for the ESP32

Golang framework for robotics, drones, and the Internet of Things (IoT)

Your Gateway to Embedded Software Development Excellence :alien:

Tiny data-over-sound library

The FastLED library for colored LED animation on Arduino. Please direct questions/requests for help to the FastLED Reddit community: http://fastled.io/r We'd like to use github "issues" just for tracking library bugs / enhancements.

ESP8266 WiFi Connection manager with web captive portal

An open source VR headset with SteamVR supports for $200

📟 JSON library for Arduino and embedded C++. Simple and efficient.

Open-source telemetry dashboard. Supports UART, BLE, MQTT, Modbus, CAN Bus and more.

Let's upgrade cheap off-the-shelf robotic mowers to modern, smart RTK GPS based lawn mowing robots!

U8glib library for monochrome displays, version 2

Set app volumes with real sliders! deej is an Arduino & Go project to let you build your own hardware mixer for Windows and Linux

An IoT Solution,Blinker library for embedded hardware. Works with Arduino R4, ESP32.

Infrared remote library for Arduino: send and receive infrared signals with multiple protocols

Arduino command line tool

An open source quadruped robot pet framework for developing Boston Dynamics-style four-legged robots that are perfect for STEM, coding & robotics education, IoT robotics applications, AI-enhanced robotics application services, research, and DIY robotics kit development.

Arduino and PlatformIO IDE compatible TFT library optimised for the Raspberry Pi Pico (RP2040), STM32, ESP8266 and ESP32 that supports different driver chips

I2C device library collection for AVR/Arduino or other C++-based MCUs

JavaScript framework for robotics, drones, and the Internet of Things (IoT)

MQTT gateway for ESP8266 or ESP32 with bidirectional 433mhz/315mhz/868mhz, Infrared communications, BLE, Bluetooth, beacons detection, mi flora, mi jia, LYWSD02, LYWSD03MMC, Mi Scale, TPMS, BBQ thermometer compatibility & LoRa.

🤖 A curated list of awesome Internet of Things projects and resources.

A client library for the Arduino Ethernet Shield that provides support for MQTT.

Blynk library for IoT boards. Works with Arduino, ESP32, ESP8266, Raspberry Pi, Particle, ARM Mbed, etc.

DIY split-flap display

🔱 Javascript's God Mode. No VM. No Bytecode. No GC. Just native binaries.

Infrared remote library for ESP8266/ESP32: send and receive infrared signals with multiple protocols. Based on: https://github.com/shirriff/Arduino-IRremote/

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ESP32DIV is a multi-purpose wireless offensive and defensive toolkit powered by an ESP32

Arduino library for controlling single-wire LED pixels (NeoPixel, WS2812, etc.)

OpenBot leverages smartphones as brains for low-cost robots. We have designed a small electric vehicle that costs about $50 and serves as a robot body. Our software stack for Android smartphones supports advanced robotics workloads such as person following and real-time autonomous navigation.

STM32 core support for Arduino

Arduino IDE 2.x

Bluetooth LE Keyboard library for the ESP32 (Arduino IDE compatible)

Wireless keystroke injection attack platform

Arduino RFID Library for MFRC522

:musical_note: :rainbow: Real-time LED strip music visualization using Python and the ESP8266 or Raspberry Pi

Arduino FOC for BLDC and Stepper motors - Arduino Based Field Oriented Control Algorithm Library

Raspberry Pi Pico Arduino core, for all RP2040 and RP2350 boards

Watchy - An Open Source E-Ink Smartwatch

A Simple ESP32 Bluetooth A2DP Library (to implement a Music Receiver or Sender) that supports Arduino, PlatformIO and Espressif IDF

Arduino STM32. Hardware files to support STM32 boards, on Arduino IDE 1.8.x including LeafLabs Maple and other generic STM32F103 boards

A shield for the Arduino Mega that can back up video game cartridges.

A Gaggia Classic control project using microcontrollers.

Bring enhanced HID functions to your Arduino!

📶 A curated list of awesome ESP8266/32 projects and code

Universal wireless communication library for embedded devices

OSI Layer 2 driver for nRF24L01 on Arduino & Raspberry Pi/Linux Devices

An Arduino library that adds one or more joysticks to the list of HID devices an Arduino Leonardo or Arduino Micro can support.

Arduino library to play MOD, WAV, FLAC, MIDI, RTTTL, OGG/Opus, MP3, and AAC files on I2S DACs or with a software emulated delta-sigma DAC on the ESP8266 and ESP32 and Pico

Arduino/ESP32 based DIY VR Haptic gloves. Compatible with SteamVR via OpenGloves.