Open Source Embedded Projects

Claude Pocket is a voice-activated AI assistant firmware for the M5Stack Cardputer ADV, powered by Anthropic's Claude and OpenAI's Whisper and TTS APIs. It features a custom C++ implementation that handles voice activity detection, streaming transcription, and real-time audio playback on hardware without external PSRAM.

A transparent UART-to-BLE cable replacement for the ESP32-C6 that implements the Nordic UART Service (NUS). It is specifically optimized for high throughput using BLE 5 features like LE 2M PHY, Data Length Extension (DLE), and credit-based flow control.

OttoClaw is an AI-powered desktop humanoid robot system built on the ESP32-S3 and FreeRTOS. It features a local lightweight agent that handles conversation, memory, and autonomous physical movements through six servos without relying on cloud servers, utilizing LVGL for its graphical interface and SPIFFS for local data persistence.

A collection of bare-metal C++ experiments for the STM32F411 (Black Pill) microcontroller, focusing on register-level programming without vendor abstraction layers. It utilizes CMSIS for hardware access and features implementations of DMA, USART, I2C, and SPI drivers using finite state machines and non-blocking logic.

This project is an alternative open-source firmware for the popular ESP8266-based DIY Weather Clock kits. It features an integrated web configuration portal, NTP time synchronization with DST support, and weather data integration from wttr.in and Netatmo stations.

NoeticMaze is an embedded navigation and control system for the NUCLEO-F446RE development board, integrating Lidar, IMU, and motor control. Built on FreeRTOS, it implements advanced robotics algorithms including ICP-based localization, grid mapping, and A* path planning for autonomous differential-drive robots.

An RP2040-based firmware for PlayStation 1 consoles that implements In-Game Reset (IGR) and In-Game Disk Switching (IGDS). It also functions as a controller for the Si5351 clock generator, providing a Dual/Multiple Frequency Oscillator (DFO/MFO) for perfect PAL/NTSC video timing.

A high-performance, touchscreen-based Sonos speaker controller built for the ESP32-P4 microcontroller. It utilizes the LVGL graphics library for a modern UI and FreeRTOS for managing concurrent tasks like audio metadata polling, image decoding, and time-synced lyrics display.

A hardware-assisted radar system that uses a Windows kernel driver to stream Counter-Strike 2 game data to an ESP32-S3. The project bypasses user-mode anti-cheat restrictions by reading memory at Ring 0 and rendering player positions on an external ST7789 SPI display.

An RP2040-based project that repurposes old infrared TV remotes into programmable USB HID devices like presentation clickers or custom keyboards. It utilizes the Arduino framework with TinyUSB for HID communication and LittleFS for storing button mappings in JSON format, configured via a Web Serial browser application.

A passive RF scanner for the M5Cardputer ADV that detects Flock Safety ALPR cameras and Raven surveillance devices. It utilizes WiFi promiscuous mode and BLE scanning on the ESP32-S3, running entirely locally without cloud connectivity. Detections are logged to an SD card with GPS coordinates and signal strength visualizations.

ehRadio is a feature-rich internet radio firmware for the ESP32 platform, specializing in the ESP32-S3 for high-performance audio streaming. It features a mobile-first WebUI, supports multiple audio decoders like I2S and VS1053, and integrates seamlessly with Home Assistant via MQTT.

This project provides firmware for the ESP32-S3 to display and cycle through animated GIFs stored in flash memory on a 320x240 ILI9341 LCD. It utilizes the bb_spi_lcd and AnimatedGIF libraries to manage display control and image decoding, allowing users to switch animations via a physical push button.

A high-performance music theory engine for embedded systems that provides advanced analysis of notes, chords, scales, and harmonic progressions. It features a zero-heap architecture and supports MIDI 1.0 and MIDI 2.0 UMP serialization across Arduino, ESP-IDF, and PlatformIO platforms.

A standalone astronomy display for the LILYGO T-Display S3 Pro powered by an ESP32-S3. It tracks solar and lunar conditions using the ipgeolocation.io API, featuring a touch-enabled interface, LittleFS caching for offline use, and seamless Home Assistant integration via MQTT.

An efficient and modular Pomodoro timer implementation specifically designed for the M5Stack Dial v1.1. It leverages the ESP32-S3 to provide a smooth rotary-based user interface, smart break calculations, and a high-performance display engine with SPIFFS-based asset management.

A high-performance development board featuring the NXP iMX RT1011 Crossover MCU with an ARM Cortex-M7 core running at 500MHz. It supports the Zephyr RTOS and Python environments, offering 128 KB RAM, 128 Mb QSPI Flash, and a compact USB-C form factor for rapid prototyping.

A standalone DIY cryptocurrency price display built around the Seeed Studio XIAO ESP32C6 and a 240x320px TFT screen. The project leverages Wi-Fi connectivity to fetch real-time market data and provides a captive portal for easy configuration via smartphone.

An energy-efficient network discovery tool for the ESP32 that utilizes ARP (Address Resolution Protocol) to identify devices on a LAN. Built using ESP-IDF and lwIP, it provides a real-time web interface to monitor device connectivity, bypassing the limitations of traditional ICMP ping scans.

A high-performance USB flash memory programmer firmware for the STC8H8K64U microcontroller. It implements custom USB drivers and SCSI command parsing to provide a fast alternative to common CH341-based programmers for SPI flash chips up to 512 Mbit.

CrumBLE is an advanced e-reader firmware for the Xteink X4 and X3, built on the ESP32-C3 platform using the Arduino framework and NimBLE. It provides enhanced Bluetooth Low Energy (BLE) remote support, a customizable collections system, and optimized e-ink rendering through specialized image pre-caching.

Retro-Zero is a Libretro-based emulator frontend designed for the Cardputer Zero running ARM64 Linux. It utilizes the LVGL graphics library for its user interface and supports a wide variety of retro gaming systems through on-demand core loading and hardware-accelerated graphics.

OpenAirScope is a high-performance, open-source environmental monitoring platform built on the STM32H743 and ESP32-C3 microcontrollers. It features multi-protocol wireless connectivity including LoRaWAN, Wi-Fi, and Bluetooth, alongside a sophisticated sensor suite for comprehensive air quality and acoustic analysis.

CRose is an integrated industrial data platform designed for manufacturing and modern agriculture, providing a full-stack solution from hardware protocol collection to statistical analysis. It leverages a containerized architecture featuring Node-RED, IoTDB, and AI-driven flow generation to simplify edge device management and data orchestration.

DeskPet is a pixel-art companion for the M5Stack Cardputer that synchronizes with Claude Code sessions via Bluetooth Low Energy. Built on the ESP32-S3 using the Arduino framework and NimBLE, it provides real-time visual feedback on AI agent states, including task progress, token usage, and permission approvals directly from the device's keyboard.

A DIY remote controller for the Quntis Monitor Light Bar PRO+ that enables smart home integration using an ESP32 and NRF24L01 module. It features a dedicated sniffer to capture proprietary remote addresses and supports both standalone MQTT and native ESPHome configurations.

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.