Open Source Embedded Projects

An open-source implementation of the SAE J2534-1 v04.04 PassThru standard, designed to connect STM32F407-based CAN adapters to professional vehicle diagnostic software. The project includes a C# Win32 DLL for protocol handling and a FreeRTOS-based ESP32 simulator for bench validation.

A real-time aircraft tracking system built for the ESP32-S3 that visualizes live flight data from the OpenSky Network API. It utilizes a dual-core FreeRTOS architecture to handle concurrent networking and high-speed rendering across a dual-display setup, featuring a hybrid map system optimized for hardware with limited PSRAM.

Noodle is a lightweight neural network inference engine designed to bring machine learning to resource-constrained microcontrollers like the Arduino Uno, Mega, and ESP32. By streaming activations and weights from external storage such as SD cards or flash memory, Noodle bypasses the typical RAM limitations that often prevent low-tier MCUs from running complex models.

A multi-modal robotic control system that translates spoken commands into physical actions using an ESP32-S3 for audio capture and an Arduino UNO for motor execution. The project integrates high-level AI services including Deepgram for transcription, GPT-4o for intent analysis, and 60db for text-to-speech feedback.

OpenC6 BIOS is an advanced modular firmware platform for the ESP32-C6 RISC-V microcontroller that implements a PC-like architecture by decoupling hardware initialization from application logic. Built on FreeRTOS and the ESP-IDF framework, it provides a standardized System Call Interface (ABI) for executing bare-metal payloads, a management engine running on the LP-Core coprocessor, and support for network-based booting and OTA updates.

A comprehensive guide and project for designing custom STM32H573-based PCBs, moving from schematic capture in KiCad to firmware development with STM32CubeIDE. It details essential hardware requirements like power regulation, external oscillators for USB, and 4-layer PCB stackups for signal integrity.

FlipDeFlock is a specialized counter-surveillance and site survey tool for the Flipper Zero that utilizes an external ESP32 module for advanced wireless monitoring. It provides passive detection of Flock Safety ALPR cameras, Bluetooth tracker monitoring, and comprehensive Wi-Fi and NFC security auditing. The project features a custom 'Net Guardian' interface for real-time threat assessment and supports signal-based device homing without the need for directional antennas.

A specialized V2X and ITS G5 message logger that utilizes the ESP32-C5 to capture IEEE 802.11p traffic at 5.9GHz. It supports GPS integration for synchronized time and positioning, logging raw data to SD cards or USB for analysis in Wireshark and CANalyzer.

An autonomous virtual aquarium firmware designed for the ESP32-2432S028R 'Cheap Yellow Display'. It features a stylized dot-grid renderer, simulated aquatic life, and automatic backlight adjustment using onboard sensors.

Periscope-OS is a passive 2.4GHz RF spectrum analyzer and signals intelligence tool for the M5Stack M5StickS3. It utilizes the ESP32-S3's promiscuous mode for deep packet inspection of 802.11 frames, featuring a sonar-style radar UI and IMU-based spatial tracking. The project leverages SPIFFS for telemetry logging and the M5Unified library for hardware abstraction.

An autonomous maze-navigating robot built on the Arduino Uno platform that uses a PD controller to maintain its position between walls. It integrates ultrasonic sensors for distance sensing, an IMU for precise turning, and an ESP-01 module to report its navigation sequence over WiFi.

HomeTiles is a tile-based firmware for ESP32-P4 touch displays designed to function as a highly configurable Home Assistant dashboard. It utilizes LVGL for its touch-first UI and FreeRTOS for task management, providing features like MQTT integration, web-based drag-and-drop configuration, and on-device OTA updates. The project targets high-performance hardware including the M5Stack Tab5 and various Waveshare MIPI-DSI displays.

Solar2MQTT is an ESP32-based firmware bridge that translates data from solar inverters to MQTT for integration with IoT platforms like Home Assistant. It supports a wide range of Chinese-manufactured inverters and features a web-based configuration portal, live JSON data streams, and support for both WiFi and Ethernet modules.

A wireless communication package for TinyGo that enables WiFi and TCP/IP functionality on ESP32-C3 and ESP32-S3 microcontrollers. It combines Espressif's low-level binary blobs with a pure-Go networking stack to provide standard Go net/http support on embedded hardware.

A secondary e-ink desk display designed for AI Agents like Claude Code and Codex, utilizing the M5Paper V1.1 hardware. The project features a Python-based daemon for server-side rendering and an ESP32 firmware that supports Wi-Fi, BLE, and USB communication.

Quectel UniKnect is an embedded software framework designed to simplify the integration of Quectel wireless modules with STM32 microcontrollers. It utilizes FreeRTOS for real-time task management and provides an API-driven interface that eliminates the need for manual AT command handling. The project includes a complete build system, cross-compilation toolchain, and support for essential network protocols like MQTT, HTTP, and FTP.

A high-performance React Native library for Bluetooth communication, supporting BLE central and peripheral modes, Android Classic Bluetooth, and Apple Multipeer Connectivity. Built with the Nitro modules architecture, it provides a comprehensive API for cross-platform device discovery, GATT operations, and background communication.

A high-performance bare-metal Arduino core for Nordic's next-generation nRF54L series, bypassing the overhead of Zephyr and the nRF Connect SDK. It provides direct hardware access to the Cortex-M33 and RISC-V coprocessor, supporting BLE, Thread, Zigbee, and Matter with minimal binary footprints.

PatternFlow is an open-source LED synthesizer built on the ESP32-S3 platform, designed to drive HUB75 RGB LED matrices with real-time, interactive visuals. The system features a modular C++ firmware architecture, four physical rotary encoders for tactile control, and a web-based ecosystem for pattern generation and audio-reactive synchronization.

Obscura One is an open-source, screenless digital camera based on the ESP32-CAM platform and housed in a 3D-printable enclosure. It captures JPEG images to a Micro SD card and features a minimalist single-button control scheme with haptic feedback and a Wi-Fi access point for wireless photo retrieval.

This project is a specialized fork of the RNode Firmware Community Edition (CE) that introduces NeoPixel status indicators for ESP32-based hardware, specifically the LilyGO LoRa32 v2.1. It serves as a software-defined LoRa modem for the Reticulum network stack, providing visual feedback for boot sequences and data transmission using the ESP32's underlying FreeRTOS-based Arduino core and SPIFFS for asset management.

An STM32F103R6-based embedded system that provides automated and manual ventilation control based on real-time temperature monitoring. It utilizes an LM35 sensor, PWM for fan speed regulation, and an L298N H-bridge for direction control, with status updates displayed on an LCD1602. The project demonstrates peripheral integration using the STM32 HAL for ADC, timers, and external interrupts.

A high-performance network microphone firmware for Seeed Studio XIAO ESP32 boards that streams 16-bit PCM audio via RTSP. It is designed for integration with BirdNET-Go and BirdNET-Pi for automated bird sound identification and includes a Web UI, MQTT telemetry, and OTA support.

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.