Open Source Embedded Projects

A portable, minimalist microkernel written from scratch for x86_64 and ARM64. It features a preemptive multiprocessor scheduler, asynchronous I/O, and a Unix-like API, all implemented in under 5,000 lines of code to minimize software bloat.

PathShield is a privacy-focused RF monitoring tool for the M5StickC-Plus, designed to detect and alert users to persistent WiFi and BLE devices. It employs a multi-threaded ESP32 architecture and a sophisticated persistence scoring algorithm to distinguish potential trackers from ambient wireless noise. The system features an offline manufacturer database and customizable detection thresholds for enhanced situational awareness.

AntiHunter is an open-source distributed perimeter defense system designed for wireless network security and operational awareness. Built on the ESP32-S3 platform using the Arduino framework and FreeRTOS, it creates a scalable mesh network of sensors for real-time WiFi/BLE threat detection, device mapping, and signal triangulation. The system integrates GPS, SD logging, and tamper-responsive data destruction to provide a robust digital tripwire for security professionals.

An Arduino library for displaying UTF-8 encoded multilingual strings and custom symbols on I2C character LCDs like the LCD1602 and LCD2004. It supports a variety of hardware including ESP8266 and ESP32, providing specialized classes to handle different LCD ROM character sets and custom CGRAM generation for languages like Vietnamese.

Lilka is an open-source DIY handheld console based on the ESP32-S3 microcontroller, designed for education and hobbyist development. It runs the Keira operating system, which utilizes FreeRTOS for task management and provides a framework for both C++ and Lua applications. The platform supports features like NES emulation, SD card storage, and wireless connectivity, all while remaining affordable and easy to assemble.

An open-source hardware and software project dedicated to developing noninvasive blood glucose monitoring using near-infrared spectrometry. It features multiple sensor designs based on the Adafruit Feather M0 and RP2040 platforms, focusing on cost-effective and accurate physiological data collection.

A development kit for the CH32V003 RISC-V microcontroller that combines an Arduino-like project structure with a CMake-based build system. It provides a streamlined workflow for Windows users, including VS Code integration, a UART-based programmer, and built-in support for persistent configuration storage in flash memory.

ESPRI is an ESP32-based interface designed to extend the functionality of ham radios, such as the Quansheng UV-K5. Built using the ESP-IDF framework and FreeRTOS, it provides features like wireless UART, AFSK/Morse beacons, audio recording to SD cards, and a web-based control panel.

An ESP32-based voice assistant that integrates I2S audio recording, Deepgram speech-to-text, and multiple text-to-speech engines like OpenAI and Google TTS. It utilizes the latest ESP-IDF I2S drivers to handle digital microphones and amplifiers while managing audio storage on a microSD card.

This project provides a feature-rich custom firmware for ESP32-based EleksTube IPS digital clocks, enabling internet time synchronization and weather updates. It utilizes the TFT_eSPI library for high-quality display management and LittleFS for asset storage, while offering a web-based configuration portal and MQTT integration for smart home ecosystems.

An ESP8266-based serial sniffer designed to intercept and parse real-time power metrics from SolArk solar inverters. It bypasses cloud latency by extracting data directly from the inverter's internal communication bus for high-granularity local automation.

BugBuster is an open-source, four-channel analog/digital I/O debug and programming tool built around the ESP32-S3 and the Analog Devices AD74416H. It features a high-precision ADC/DAC, waveform generation, and a 32-switch MUX matrix, all managed by a FreeRTOS-based firmware and a cross-platform Tauri desktop application.

Gaggimate is an ESP32-based smart control upgrade for Gaggia espresso machines, providing a custom UI for temperature monitoring and pump control. It leverages the FreeRTOS-based ESP32 platform using LVGL and TFT_eSPI for its display interface, and NimBLE-Arduino for wireless connectivity.

This project transforms an ESP32 into a bridge between wired USB peripherals and Bluetooth-enabled hosts. By combining software-defined USB host capabilities with the NimBLE stack, it allows standard USB keyboards and mice to function as wireless BLE devices across multiple operating systems.

A wireless signal jammer project that utilizes the NRF24L01 transceiver and Arduino to disrupt communications in the 2.4GHz band. It specifically targets Bluetooth Low Energy (BLE) advertising channels by broadcasting a continuous carrier wave across multiple frequencies.

This ESP32-based desk clock provides real-time monitoring of temperature, atmospheric pressure, and humidity using the BME280 sensor and a DS3231 RTC. The system features an auto-dimming MAX7219 LED matrix display, WiFi-based NTP time synchronization, and a built-in web server for configuration, all developed using the Arduino framework and SPIFFS for data management.

A software-defined GPS receiver implemented on the ESP32 platform, utilizing the MAX2769 RF frontend for raw signal capture. It performs all GPS signal processing on-chip and features a graphical user interface built with LVGL for satellite tracking and status monitoring.

A reverse-engineering project focused on the proprietary D-Bus protocol used in BSH (Bosch, Siemens, Neff) home appliances. It provides hardware designs and software implementations for ESP32 and Arduino to monitor, analyze, and control appliances like washing machines and dishwashers.

A standard ESP-IDF component that integrates the 4diac FORTE open-source PLC runtime framework for ESP32 and ESP32-S2 microcontrollers. It utilizes FreeRTOS and LwIP to provide an IEC 61499 compliant execution environment for distributed industrial control applications.

An expansion module for the Portapack H4 and PortaRF that adds GPS, environmental sensors, and a web-based remote control interface. Built on the ESP-IDF framework with FreeRTOS, it integrates NimBLE Bluetooth and LwIP to provide features like signal geotagging, fox hunting assistance, and satellite tracking.

A minimalist, low-power smartwatch built with a 2.9-inch e-ink display and a Seeed Studio XIAO nRF52840 Sense. It utilizes a custom flex PCB and integrated sensors to provide a comfortable, long-lasting wearable experience focused on essential timekeeping.

HomeRPC is an embedded Remote Procedure Call (RPC) framework designed for smart home scenarios on the ESP32 platform. Built on FreeRTOS and ESP-IDF, it facilitates efficient communication between IoT devices and backend services, particularly for conversational AI and LLM-driven automation.

NimBLE OTA is a specialized library for ESP32 devices that enables firmware updates over Bluetooth Low Energy (BLE). It leverages the memory-efficient NimBLE stack to provide a robust OTA service, featuring secure authentication, progress tracking, and compatibility with both Python-based and web-based upload tools.

Saturn is a multi-functional firmware for the M5Stack Cardputer designed for wireless security testing, infrared device interaction, and portable utility tasks. Built on the ESP32-S3 platform, it features Wi-Fi deauthentication tools, Bluetooth LE spoofing, and a comprehensive infrared remote control library.

A Modbus to Matter adapter designed for the ESP32-C6 microcontroller. It enables Modbus-compatible devices, such as the Eastron SDM120M energy meter, to be exposed as Matter Electrical Sensor devices using the ESP-IDF framework and NimBLE Bluetooth stack.

An audio streaming server for the M5Cardputer that captures microphone input at 16000 Hz and streams it to a web browser over Wi-Fi. It features on-device Wi-Fi configuration, NVM storage for credentials, and optimized power consumption through display management.

An open-source e-ink desk companion, clock, and air quality monitor based on the ESP32. It utilizes the ESP-IDF framework for firmware and includes a custom PCB, 3D-printable enclosure, and a web-based configuration tool.

A 3rd stage graphical bootloader for ESP32-S3 and ESP32-P4 devices that allows users to select applications from OTA partitions via a visual menu. Built with ESP-IDF and LVGL, it manages multiple firmware images and provides a mechanism for applications to return to the bootloader upon restart.

A graphical application example for ESP32 microcontrollers using the Swift 6.1 programming language and SDL3. It supports various Espressif SoCs including ESP32-C3, ESP32-C6, and ESP32-P4, utilizing ESP-IDF 5.4 and LittleFS for asset management.

A lightweight serial UART communication utility for the M5Cardputer. It enables users to configure serial settings and communicate with external 3.3V devices through the device's Grove port using the ESP32-S3 hardware UART.

A Raspberry Pi Pico-based bridge that converts HDMI CEC (Consumer Electronics Control) signals into USB HID keyboard inputs, enabling TV remote control for media centers like Kodi. It utilizes FreeRTOS for task management and supports both RP2040 and RP2350 microcontrollers.

A powerful universal remote control application for the M5Cardputer (ESP32-S3) supporting over 3,400 remote profiles and 30,000 commands. It features compatibility with Flipper-IRDB .ir files, automatic scanning for device discovery, and NVS-based favorites storage.

A high-performance Sega Master System and Game Gear emulator for RP2040 and RP2350 microcontrollers. It features HDMI video and audio output, SD card support for ROMs and save games, and extensive compatibility with USB and legacy game controllers.

A high-performance DMG and Game Boy Color emulator ported to the Raspberry Pi Pico 2 (RP2350). It features HDMI video and audio output via PicoDVI, SD card support for ROM management, and extensive gamepad compatibility.

A multi-system retro console emulator designed for the Raspberry Pi RP2350-based Adafruit Fruit Jam. It supports emulation for NES, GameBoy, Game Gear, Master System, and Sega Genesis, utilizing PSRAM and HSTX for high-performance video and audio output.

A compact robotics platform featuring firmware for motor control and a Wi-Fi bridge. It utilizes an ESP32-C6 for wireless connectivity and a main board for servo-driven animations and OLED face rendering. The project supports various motion sequences, captive portal control, and optional BLE gamepad integration.