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…

Marlin is an optimized firmware for RepRap 3D printers based on the Arduino platform. Many commercial 3D printers come with Marlin installed. Check with your vendor if you need source code for your…

Automatic License Plate Recognition library

Universal Radio Hacker: Investigate Wireless Protocols Like A Boss

OctoPrint is the snappy web interface for your 3D printer!

JavaScript player library / DASH & HLS client / MSE-EME player

A full functional WiFi Repeater (correctly: a WiFi NAT Router)

Multi-purpose serial data visualization & processing program

Easily document cables and wiring harnesses.

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

Async Web Server for ESP8266 and ESP32

Easy MultiSensor device based on ESP8266/ESP32

Mission Planner Ground Control Station for ArduPilot (c# .net)

Multiprotocol TX Module (or MULTI-Module) is a 2.4GHz transmitter module which controls many different receivers and models.

Paparazzi is a free and open-source hardware and software project for unmanned (air) vehicles. This is the main software repository.

Arduino libraries, code and applications

MySensors library and examples

bladeRF USB 3.0 Superspeed Software Defined Radio Source Code

A do-it-yourself thermal imager, compatible with the FLIR Lepton 2.5, 3.1R and 3.5 sensor with Arduino firmware

A (paused) work-in-progress long-range, low-bandwidth wireless disaster recovery mesh network powered by the sun.

Files to add Digistump support (Digispark, Pro, DigiX) to Arduino 1.6.X (1.6.5+)

Version 4 of the diyBMS

Salamandra is a tool to find spy microphones that use radio freq to transmit. It uses SDR.

RFM69 library for RFM69W, RFM69HW, RFM69CW, RFM69HCW (semtech SX1231, SX1231H)

Scada-LTS is an Open Source, web-based, multi-platform solution for building your own SCADA (Supervisory Control and Data Acquisition) system.

NMEA and ublox GPS parser for Arduino, configurable to use as few as 10 bytes of RAM

Low-cost LoRa IoT & gateway with SX12XX (SX1261/62/68; SX1272/76/77/78/79; SX1280/81), RaspberryPI and Arduino boards

Digital Speech Decoder

a collection of "Little Electronic Art Projects", most involving electronics or an Arduino in one way or another!

用STC单片机制作的简易示波器 / DIY Mini Digital Storage Oscilloscopes(DSO) with STC MCU