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…

Open Source Soldering Iron firmware

U8glib library for monochrome displays, version 2

A low-power E-Paper weather display powered by an ESP32 microcontroller. Utilizes the OpenWeatherMap API.

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

CircuitPython - a Python implementation for teaching coding with microcontrollers

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

A system daemon to allow session software to update firmware

Watchy - An Open Source E-Ink Smartwatch

*That Project's project repository

A Hardware Hacking Tool with Web-Based CLI That Speaks Every Protocol

Arduino core for ATtiny 1634, 828, x313, x4, x41, x5, x61, x7 and x8

Lightpack and Prismatik open repository

USB host/device implementation using PIO of raspberry pi pico (RP2040/RP2350).

Horizon is a free EDA package

MQTT library for Arduino

Bootloader for STM32F103 boards, for use with the Arduino_STM32 repo and the Arduino IDE

AVRDUDE is a utility to program AVR microcontrollers

cheap lipo charger

Driver for SSD1306, SSD1331, SSD1351, IL9163, ILI9341, ST7735, PCD8544, Nokia 5110 displays running on Arduino/ESP32/Linux (Rasperry) platforms

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

ESP8266 Weather Station in Color using ILI9341 TFT 240x320 display

esp32 version of Ka-Radio (https://github.com/karawin/Ka-Radio) by jp Cocatrix

Tutorial for making an ARM dev board in KiCAD

MQTT Broker library for ESP8266 Arduino

Internetradio with ESP32-S3/P4, I2S DAC and SPI/RGB TFT Display with Touchpad