Open Source Embedded Projects

TankSync is a solar-powered, local-first smart water monitoring system built on ESP32 and ESP32-C3 hardware using the ESP-IDF framework. It utilizes long-range LoRa communication to bridge rooftop sensors with an indoor hub, offering Home Assistant integration and offline reliability via FreeRTOS-based firmware.

DS5 Bridge is a firmware and software suite that enables wireless Sony DualSense controller support on Windows via a Raspberry Pi Pico 2 W. It utilizes the TinyUSB and BTstack libraries to bridge Bluetooth HID reports to USB, featuring advanced support for HD haptics, adaptive triggers, and integrated audio. The project includes a dedicated Windows companion app for real-time configuration and profile management.

AirMouseS3 is an ESP32-S3 based gesture-controlled mouse that uses an onboard gyroscope and accelerometer to translate physical movement into cursor actions. Designed for the M5Stack StickS3, it utilizes the NimBLE library for Bluetooth HID connectivity and the M5Unified framework for hardware management.

High-performance firmware for a DIY 'click-to-photon' latency tester built on the Teensy 4.1. It utilizes an 8kHz USB polling rate and a light sensor to measure the delay between a mouse click and on-screen visual changes with microsecond precision.

ASCII Aquarium is a live-rendered fish tank simulation and clock designed for the ESP32-2432S028R 'Cheap Yellow Display.' It uses the TFT_eSPI library to animate fish, bubbles, and seaweed using ASCII characters, featuring complex schooling behaviors and touch-to-feed interactivity. The project supports Wi-Fi time synchronization, persistent settings via ESP32 Preferences, and unique hardware expansions like beam splitter cubes.

An ESP8266-based signal generator that synchronizes radio-controlled clocks by mimicking the German DCF77 longwave time station. It fetches precise time via NTP over Wi-Fi and uses PWM harmonics to broadcast a localized 77.5 kHz signal.

FIRM is a high-powered rocketry flight computer firmware designed for accurate attitude and position tracking. Built for the STM32F405 microcontroller, it utilizes FreeRTOS and advanced Kalman filtering to process data from an array of inertial and environmental sensors.

Japi Base is a hackable retro computer platform for the Raspberry Pi Pico 2 (RP2350) that provides integrated VGA, PS/2 keyboard, SD storage, and audio capabilities. It utilizes a dual-core architecture where I/O management is isolated to one core and a single PIO block, leaving the second core and remaining peripherals entirely available for user applications. The system features a unified file API using littlefs for internal flash and FatFs for external SD cards.

DSSH is a sophisticated SSH client for the Nintendo 3DS featuring a full ANSI terminal, Pinyin input method, and voice-to-text integration. Built with libssh2 and mbedTLS, it allows users to manage remote servers and interact with AI tools like Claude Code directly from their handheld console.

FlightRadar24-TTGO is an ESP32-based firmware that provides a real-time aircraft tracking display on TTGO and LilyGo-T-Display-S3 modules. It leverages the FlightRadar24 API for live updates and uses the LVGL library to render detailed flight information and carrier logos. The project includes a web-based configuration portal for setting location parameters, units, and traffic filters.

A comprehensive environmental monitoring system built on the ESP32-S3 platform, featuring an e-paper display for high-visibility, low-power data visualization. The project integrates the GxEPD2 library for display management and includes full PCB schematics and CAD designs for a complete hardware-software solution.

An embedded flight tracking application for the ESP32-C3 Super Mini and a 1.28-inch round GC9A01 display. It visualizes live ADS-B aircraft data from adsb.fi on a sonar-style interface, providing real-time updates on aircraft headings, altitudes, and speed vectors with a captive portal for easy configuration.

A single-button wireless keyboard built on the ESP32-C5 that translates Morse code patterns into HID keystrokes over Bluetooth Low Energy. It features a real-time LVGL UI on a tiny 0.85-inch display and implements secure BLE bonding using the NimBLE stack.

An AI companion robot project for the M5Stack AtomS3R that connects an ESP32-based body to local AI services. It supports speech recognition, local LLM chat, and text-to-speech integration while providing a hardware interface for sensors and servos.

PomoDesk is an ESP32-S3-based physical Pomodoro timer designed to help users maintain a flow state while ensuring they take regular breaks. It uses a NeoPixel LED ring for visual feedback and features power-saving optimizations by disabling unused wireless radios.

Melody Machine is a feature-rich MP3 player and internet radio firmware designed for the LilyGO T-LoRa Pager (ESP32-S3). It leverages FreeRTOS for dual-core audio processing and the LVGL library to provide a responsive graphical interface with support for local microSD playback and WiFi-based streaming.

Shrike is a family of low-cost, open-source FPGA development boards paired with microcontrollers like the RP2040, RP2350, and ESP32-S3. These boards feature a Renesas FPGA with 1120 LUTs, designed to bridge the gap between embedded microcontrollers and reconfigurable logic for learners and hobbyists.

Galagino is an ESP32-based arcade emulator ported to PlatformIO, supporting 24 classic games like Galaga, Pac-Man, and Donkey Kong. It is specifically optimized for the 'Cheap Yellow Display' (CYD) and designed to be retrofitted into commercial micro-arcade cabinets using the Arduino framework on FreeRTOS.

A specialized port of the ESP32 Marauder firmware for the ESP32-3248S035C development board, featuring a 3.5-inch capacitive touchscreen. It provides mobile tools for Wi-Fi security auditing, network scanning, and wardriving, leveraging FreeRTOS and the Arduino framework for efficient hardware management.

A sophisticated physical chess board utilizing Hall effect sensors for piece detection and dual displays for game status and clock. It runs on Go-powered Raspberry Pi or Orange Pi hardware, featuring deep Lichess integration, local Stockfish analysis, and a custom DietPi-based OS image with power-loss protection.

A high-performance VGA controller built around the 8-bit PIC18F47K42 microcontroller, capable of 360x480 resolution with 16 colors. It utilizes hardware peripherals like DMA, PWM, and SPI to generate signals with minimal CPU overhead, accepting ANSI-style escape sequences over a UART interface.

Paper Pi is a modular, asynchronous dashboard designed for Waveshare E-Ink displays, built with Python 3.14+. It targets Raspberry Pi and other Linux-based boards, providing a variety of widgets such as GitHub stats, weather, and HackerNews with support for 4-level grayscale rendering.

This project provides pre-compiled Tasmota firmware binaries specifically optimized for smart meter reading via SML and advanced scripting on ESP32 and ESP8266 platforms. It features a dual-track approach offering both the classic Tasmota Scripter and the high-performance TinyC VM, utilizing FreeRTOS for background processing and LittleFS for filesystem management. The firmware supports energy monitoring, Google Charts visualization, and emulation of smart battery interfaces like Shelly Pro 3EM.

PaperSat is a standalone satellite tracking application for the M5Paper S3 e-ink tablet, providing real-time orbital predictions and polar sky plots. It utilizes SGP4 propagation for high-accuracy tracking and features an offline-first design with LittleFS for TLE data caching. The project is designed for amateur radio operators and observers, offering on-device configuration for location and time.

An ESP8266-based IoT solution for remote management of the Logitech Z906 5.1 surround sound system. It provides a web interface and MQTT integration for volume control, input switching, and status monitoring via the system's DE-15 console port.

Pixel Pets is an open-source virtual pet ecosystem built for the M5Stack hardware family, featuring interactive digital companions with adaptive behaviors. It utilizes FreeRTOS for task management and the M5Unified library for hardware abstraction, supporting advanced features like ESP-NOW inter-device communication, offline LLM-based voice control, and real-time environment syncing. The project targets various ESP32 platforms including the CoreS3, Core2, and M5StickC PLUS2.

A specialized collection of fonts and utilities designed to add Ukrainian character support to popular Arduino graphics libraries like Adafruit GFX and TFT_eSPI. It includes a variety of serif, sans-serif, and monospace typefaces along with a conversion function to handle UTF-8 string encoding for embedded displays.

ESP32 Bit Pirate is an open-source firmware that transforms ESP32-S3 development boards into multi-protocol hardware hacking tools. It provides extensive support for digital protocols like I2C, SPI, and UART, as well as radio communications including Wi-Fi, Bluetooth, and Sub-GHz, utilizing FreeRTOS and LittleFS for robust device interaction.

An automated irrigation system built with ESPHome for the M5Stack AtomS3-Lite and Unit Watering modules. It supports up to six plants via I2C expansion and features moisture-based automation and safety limits through Home Assistant integration.

BETTA HA Panel is a runtime-configurable Home Assistant dashboard firmware for ESP32-P4 and ESP32-S3 touchscreen devices. Built on the ESP-IDF framework using LVGL and LittleFS, it allows users to design complex, multi-page layouts via a web-based drag-and-drop editor without requiring YAML configuration or firmware rebuilds.

Claude Buddy Pico is a hardware mascot for Claude Desktop, ported from the original M5Stack version to the Raspberry Pi Pico 2 W. It features a 2.8-inch landscape display, Bluetooth Low Energy connectivity via BTstack, and physical buttons for approving or denying AI tool calls. The project utilizes the Pimoroni Pico library for peripheral management and includes custom 3D-printable CAD files for the enclosure.

An expressive AI desk companion based on the Seeed Xiao ESP32-S3 that features a fully animated face system. It utilizes the ESP-IDF framework with FreeRTOS, LVGL for rendering display interfaces, and SPIFFS for asset storage. The project integrates I2S audio components for listening and speaking capabilities, creating a dynamic interactive experience.

A custom bootloader for the ESP32 that enables switching between multiple firmware versions using hardware switches. It integrates Over-The-Air (OTA) update capabilities and the ESP-Serial-Flasher library to facilitate remote firmware management and master-slave device flashing.

A real-time monitoring tool for Claude Code usage, designed for the ESP32-2432S028R (CYD) hardware. The project uses a Go-based daemon to track Anthropic API rate limits and displays animated pixel art sprites that react to the user's coding activity.

An open-source watch operating system designed for ESP32-S3 microcontrollers, specifically targeting the LILYGO T-QT Pro. It provides a customizable environment for watch faces and applications, utilizing the TFT_eSPI library for display management and FreeRTOS for task handling. The system includes features like WiFi time synchronization, motion sensing via MPU6050, and integrated games.

An embedded controller for the KompressorKlock project, built on the STM32G071G8Ux microcontroller. It manages user input via a rotary encoder and controls peripheral hardware using I2C and PWM signals. The system is developed using the STM32Cube G0 firmware package and standard HAL drivers.