FreeRTOS Projects

A digital synthesizer project built using the ESP32 microcontroller and an external I2S PCM5102A DAC. It utilizes the Maximilian audio engine and arduino-audio-tools for real-time sound synthesis and signal processing. The repository provides source code and hardware configuration details for building a functional audio device.

A hardware-based authentication system for ESP32 microcontrollers using SRAM Physical Unclonable Functions (PUF). It leverages unique manufacturing variations in RTC SLOW memory to generate authentication tokens without storing credentials on-device. The project includes ESP32 firmware, a measurement server, and analysis tools for identifying stable bits.

An ESP32-S3 based information display utilizing a 7.5-inch 4-color e-ink screen. It integrates with Home Assistant via ESPHome to provide a visual dashboard for weather forecasts and calendar events with automated hourly updates.

An integrated development kit for deploying Large Language Model (LLM) capabilities like voice agents and text chat on client-side and embedded platforms. It supports device management via MQTT and runs on systems including ESP32, FreeRTOS, Linux, and Windows.

An ESP32-S3 firmware for monitoring Victron SmartSolar chargers and battery monitors via Bluetooth. It decrypts BLE advertisements using AES-128 and displays real-time metrics on a 3.5-inch LCD using the LVGL library.

A high-performance MJPEG video player optimized for the ESP32-2432S028 'Cheap Yellow Display' (CYD) module. It utilizes the Arduino_GFX library and JPEGDEC for efficient frame-by-frame playback from an SD card, supporting hardware-accelerated rendering on the ILI9341 display controller.

A flexible e-paper display driver for the ESP-IDF framework featuring LVGL 9 integration. It supports a wide range of panels including black/white, 4-color BWRY, and 6-color displays with advanced features like Floyd-Steinberg dithering and partial refresh. Designed for low-power IoT devices, electronic shelf labels, and photo frames on ESP32 series microcontrollers.

A real-time audio frequency visualizer built on the ESP32 microcontroller using the Arduino framework and Kiss FFT library. It processes audio signals through ADC or I2S inputs to display 64 frequency bands on an SSD1322 OLED screen.

A hardware-accelerated graphics layer for the ESP32-P4 that integrates the Pixel-Processing Accelerator (PPA) with LovyanGFX and M5GFX. It provides high-performance image rotation, scaling, mirroring, and blending for MIPI/DSI display panels.

A game selection menu and emulator frontend for running single-screen Game & Watch ROMs on the M5Stack Tab5. It features support for touch controls, USB gamepads, and automatic screen orientation via the built-in IMU.

An ESP32-S3 based portable intelligent electronic load featuring high-precision control and a rich graphical interface. It utilizes FreeRTOS for multi-tasking and integrates PID and Model Predictive Control (MPC) algorithms with Kalman filtering for accurate current regulation. The system supports Constant Current (CC), Constant Power (CP), and Constant Resistance (CR) modes with real-time monitoring via LVGL.

A portable real-time aircraft tracker for the M5StickC Plus 2 that utilizes the adsb.lol API to display flight telemetry and route information. It features a multi-page OLED interface, emergency squawk highlighting, and a web-based setup portal for easy configuration.

An intelligent arousal management system for ESP32 that connects to Lovense devices via Bluetooth LE. It uses a pressure sensor for automated edging control and features a real-time web dashboard for monitoring and configuration.

A Model Context Protocol (MCP) server implementation for the ESP32-CAM that enables remote camera control and system monitoring through a standardized JSON-RPC 2.0 API. It supports image capture optimized for AI assistants, LED/flash management, and comprehensive hardware diagnostics.

A modular Arduino library for the ESP32-S3 that enables USB Host MIDI and BLE MIDI server functionality. It provides a complete solution for receiving, interpreting, and displaying MIDI messages, featuring a dedicated MIDI handler for note processing and a display module optimized for the ST7789 controller.

A transparent Modbus TCP-to-RTU bridge component for ESPHome, targeting ESP8266 and ESP32 platforms. It facilitates communication between multiple Modbus TCP clients and serial Modbus RTU slaves using RS-485 or UART hardware, featuring full integration with Home Assistant for monitoring and control.

A comprehensive treadmill computer replacement based on the ESP32-S3 and ESPHome firmware. It implements the Fitness Machine Service (FTMS) protocol to enable direct Bluetooth connectivity with fitness apps like Zwift and Kinomap while controlling treadmill hardware via UART.

Lumen is an open-source desktop hardware node based on the ESP32-C3 and FreeRTOS. It functions as a programmable interaction device similar to a Stream Deck, featuring a 240x240 display, rotary encoder, and integrated sensors for system monitoring and game state feedback.

A firmware project for an STM32L071-based USB dongle that enables LoRa communication via AT commands. It utilizes the Semtech SX1262 transceiver and FreeRTOS to provide a plug-and-play wireless link for testing, range measurement, and sensor networks.

A modular, high-performance weather display system for the LilyGO T-Display S3 powered by an ESP32-S3. It provides real-time weather updates via the OpenWeatherMap API, featuring a smooth 40 FPS UI, automatic NTP time synchronization, and robust error recovery.

Firmware for an ESP32-C6 based E-Paper display device featuring BLE provisioning, AWS IoT connectivity, and OTA updates. It targets the Spectra 6 7.3-inch display and integrates motion sensing via the KXTJ3-1057 accelerometer.

A collection of example applications for the ESP-MESH-LITE networking framework on ESP32. It demonstrates various protocol implementations including MQTT, HTTP, WebSocket, and FTP within a mesh topology. The project highlights the unique architecture of ESP-MESH-LITE where each node enables the LWIP stack for direct network interface invocation.

A technical implementation and hardware guide for the ESP32-C3 Supermini board equipped with a 0.42-inch OLED. It provides a specific software workaround for the U8g2 library to support the non-standard 72x40 resolution using coordinate offsets. The project includes pin mappings and an Arduino-based example for I2C display communication.

A comprehensive integration for Jikong (JK) Battery Management Systems using ESPHome and Modbus RS485. It enables monitoring and control of multiple battery packs via ESP32 hardware, specifically designed for Home Assistant ecosystems.

A memory-optimized C library for ESP32 microcontrollers to interface with the OpenRouter AI API. It supports chat completions, real-time token streaming, AI function calling, and multimodal processing within the ESP-IDF framework.

A project that ports the R2P2 (Ruby Rapid Portable Platform) to the ESP32 series of microcontrollers using the ESP-IDF framework. It enables running PicoRuby on embedded hardware with support for automatic script execution and integrated file storage.

A MicroPython-based gateway for ESP32 devices that interfaces with serial GPS modules to provide RTK and NTRIP services. It supports Bluetooth LE, ESPNow proxying, and multiple NTRIP modes including Client, Server, and Caster for high-precision positioning.

A modular flight control software framework designed for high-performance 8kHz Gyro/PID loops on dual-core processors. It supports bare-metal or FreeRTOS environments across ESP32, Raspberry Pi Pico, and STM32 platforms while maintaining compatibility with Betaflight configuration tools.

An industrial monitoring solution that utilizes ESP32-CAM and ultrasonic sensors to detect surface damage and measure belt thickness. The system employs an InceptionV3 deep learning model for real-time fault classification and provides automated alerts and shutdown capabilities via an IoT-integrated dashboard.

An ESPHome component designed to interface with Hitachi air conditioners using the serial H-Link protocol. It serves as a local, open-source alternative to proprietary cloud adapters, providing full integration with Home Assistant. The project supports a wide range of features including climate control, outdoor temperature sensing, and maintenance alerts on ESP32 and LibreTiny hardware.

A standalone ESP32-based voice assistant that enables natural conversations with multiple custom AI personalities. It integrates ElevenLabs for speech-to-text, GroqCloud or OpenAI for LLM processing, and OpenAI for text-to-speech, supporting real-time web searches and email archiving of chat history.

A collection of ESPHome configuration files and external components specifically designed for M5Stack hardware. It provides ready-to-use YAML templates for devices like the CoreS3, Atom EchoS3R, and PowerHub, utilizing the ESP-IDF framework for Home Assistant integration.

A dedicated hardware controller for Eight Sleep mattresses using the M5Stack ATOMS3 Dev Kit and ESPHome. It provides a physical interface to monitor bed temperature, sleep stages, and state, while allowing users to cycle through temperature presets via a built-in button and Home Assistant integration.

An ESP32-C3 based HDMI multiplexer that enables wireless switching between two HDMI sources. It utilizes the TS3DV642 high-speed switch IC to support HDMI 2.0 specifications, including 4K resolution at 60Hz.

A powerful gateway firmware that bridges MeshCore LoRa mesh networks with MQTT brokers, enabling bidirectional message flow between LoRa devices and MQTT-based applications. It features full repeater functionality, secure TLS connectivity, and an interactive serial configuration menu for ESP32-based LoRa hardware.

A custom firmware project for a home-built radio receiver based on the ESP32-S2 and SI4732 module. It features a high-resolution Sharp LS027B7DH01 LCD and utilizes the Arduino framework with libraries like U8g2 and PU2CLR SI4735 for multi-band radio reception.