Open Source Embedded Projects

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.

A custom-built 6-digit clock utilizing Soviet-era IV-11 vacuum fluorescent display tubes and an Arduino Nano Every. The project features a static drive architecture for maximum brightness, integrated power conversion for high-voltage rails, and a robust finite state machine for user configuration and timekeeping.

M5_Crystal is a modular firmware for M5Stack devices like the M5StickCPlus2 and Cardputer, providing a suite of tools for Wi-Fi, NFC, and Bluetooth interaction. It utilizes the M5Unified and M5GFX libraries for hardware abstraction and is built on a custom wrapper system designed for rapid feature development.

A full-stack embedded Linux project for the NXP i.MX 8M Plus EVK featuring real-time NPU-accelerated object detection and NIR spectral monitoring. It demonstrates a complete development workflow from Yocto BSP bring-up and custom kernel module development to high-level Python applications using TensorFlow Lite and GStreamer.

This project details the reverse engineering and firmware development for repurposing a YOJOCK/Kowsi USB-C multimeter as a PY32F002A development board. It features a custom firmware implementation that provides power sensing, a stopwatch, and games, leveraging a bit-banged SPI interface for its 160x180 color display.

Clawdmeter is an ESP32-S3-powered desk dashboard that monitors Claude Code token usage and displays it on a 2.16" AMOLED screen. It uses the LVGL library for its high-resolution UI and the NimBLE stack to communicate with a host daemon via BLE, while also functioning as a HID keyboard for shortcuts. The project features dynamic pixel-art animations that react to real-time API utilization rates.

An ESP32-based bridge that interfaces CAN bus systems with IoT environments using the Lawicel (SLCAN) protocol. It supports real-time CAN data monitoring and transmission via a web interface, Serial, or WebSockets, and is designed for automotive and industrial applications.

An interactive virtual pet built with Rust on the ESP32-C3, featuring environmental sensing and a state-driven animation system. It utilizes DHT and LDR sensors for environmental awareness and NVS for persistent statistics.

A wireless e-ink device based on the ESP32-powered Soldered Inkplate 6 platform that displays meeting room schedules. It utilizes the Roombelt backend for data and features a secondary digital photo frame mode that reads images from a microSD card.

This project provides an STM32 HAL-based implementation for communicating with a Toyota RAV4 climate control panel via the LIN bus. Targeting the STM32G474RE microcontroller, it demonstrates reverse engineering techniques for automotive HMI modules and utilizes DMA for efficient serial data handling.

An experimental USB DAC and Class-D amplifier implemented on the Raspberry Pi RP2040. The project uses PIO-based H-bridge control and a 4th-order delta-sigma modulator to drive external MOSFETs directly from the microcontroller.

This project enables remote control and monitoring of Flexispot standing desks using an Arduino Nesso N1 or other M5Unified-compatible ESP32 devices. It emulates the original desk controller by communicating with the LoctekMotion control box via serial protocols, providing both a web-based UI and physical button controls.

IkeDryBox is an advanced ESP32-based DIY filament dryer featuring precision PID temperature control and a responsive LVGL touch interface. It integrates seamlessly with Home Assistant via MQTT and provides a built-in WebUI for real-time parameter tuning and network configuration.

A lightweight and efficient wrapper for the KISS FFT library, specifically designed for the Raspberry Pi Pico (RP2040). It provides high-level functions for capturing analog signals via ADC and DMA, processing them into frequency bins, and performing real-time signal analysis.

A physical companion device for the Claude Code AI assistant, utilizing the M5Paper V1.1 e-ink display. It features real-time session mirroring, hardware-based tool approval, and touch-screen interactions powered by ESP32 and a Python-based daemon.

Beremiz4uC is a real-time runtime environment that executes Beremiz IDE PLC programs on STM32F4 microcontrollers using Zephyr RTOS. It features dynamic code loading via udynlink, eRPC-based communication, and flexible I/O management for industrial control applications.

An LVGL port for the M5Stack Dial (M5Dial) based on the ESP-IDF framework. It integrates the Light and Versatile Graphics Library with M5Unified to provide support for the device's circular touch display and rotary encoder.

An implementation for the Sunton ESP32-S3 800x480 capacitive touch display utilizing ESP-IDF 5.5.2 and LVGL 9.4. It features optimized memory management strategies for PSRAM-based framebuffers and leverages FreeRTOS for efficient task orchestration.

An ESP-IDF based firmware for creating local mesh networks using ESP32-DevKitV1 hardware. It features a self-hosted web server for configuration, real-time topology visualization via WebSockets, and a custom OTA update mechanism that broadcasts firmware to all nodes in the mesh.

An alternative firmware for Riden WiFi modules that provides Modbus TCP and SCPI support for RD-series power supplies. Built using the Arduino framework for ESP8266, it enables integration with professional lab automation tools and provides a comprehensive web interface for remote monitoring and control.

TISM is a cooperative multitasking framework for the Raspberry Pi Pico (RP2040 and RP2350) that enables concurrent task execution through a state-machine architecture. It provides essential system services including dual-core scheduling, a thread-safe messaging system, and hardware abstraction for interrupts and timers.