FreeRTOS Projects

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.

Bluehound is a comprehensive BLE reconnaissance and anomaly detection framework designed for real-time device discovery and environment analysis. It combines a Python-based Linux backend with ESP32-powered hardware components to monitor signal stability, detect RF interference, and visualize Bluetooth activity.

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.

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 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.

A collection of creative embedded projects for the M5Stack ecosystem, featuring real-time audio processing, BLE-based telemetry, and robotics. The projects leverage the ESP32-based M5Unified library and MaixPy to implement features like voice-controlled rovers, hardware monitors, and camera streaming.

An open-source hardware and software suite for Mazda Miata MX-5 enthusiasts to customize pop-up headlight behavior. The project utilizes an ESP32-S3 running FreeRTOS to manage BLE communication, custom animations, and OTA updates via a dedicated React Native application.

The SW32 is a modern 4-channel E-Stim box powered by a dual-processor architecture featuring an RP2040 and an ESP32. It provides isolated outputs, a color display, and versatile control via USB, Bluetooth, or Wi-Fi, utilizing FreeRTOS through the ESP-IDF framework alongside the SPIFFS and littlefs filesystems.

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.

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.

A high-precision delay component for ESP-IDF that provides microsecond granularity using the esp_timer subsystem. It allows FreeRTOS tasks to sleep for sub-millisecond durations without busy-waiting, utilizing task notifications for efficient scheduling.

Cydintosh is a Macintosh Plus emulator designed for the ESP32-based Cheap-Yellow-Display (CYD). It utilizes the Musashi 68k emulator core and umac to run classic Macintosh software alongside modern ESP32 features like WiFi, MQTT, and Home Assistant integration.

A standalone ESP32-S3 firmware project for a custom round external controller for La Marzocco espresso machines. It utilizes the ESP-IDF framework, FreeRTOS, and the LVGL graphics library to provide an on-device UI, BLE/cloud connectivity, and a local setup portal for managing machine settings and recipes.

A sophisticated quadruped crawling robot powered by an STM32F103C8T6 microcontroller and an ESP32-CAM for real-time vision and remote connectivity. It utilizes FreeRTOS for multi-tasking and MicroPython for the wireless communication stack, supporting both cloud-based MQTT control via a mobile app and local control through a web interface.

BluButton is an open-source firmware for ESP32 and ESP32-C3 devices, implementing a BLE button transmitter compatible with the Shelly BLU Button ecosystem. Built on ESP-IDF v6.0 and FreeRTOS, it focuses on high energy efficiency through deep-sleep cycles and provides encrypted advertising for secure button event triggers.

The Tick is an ESP32-C3-based covert access control implant designed to intercept, log, and replay credentials across Wiegand, Magstripe Clock&Data, and OSDP protocols. It features a robust hardware design with integrated level shifting and a high-efficiency DC-DC converter, supported by a modular software stack utilizing NimBLE for Bluetooth and a custom HTTP interface for remote management.

An ESP32-based gateway for Hekatron Genius Plus X smoke detectors, enabling integration with modern smart home systems via MQTT and WebSocket. It features a custom PCB design with a CC1101 transceiver and a web-based management interface built on SvelteKit.

An optimized Arduino library for background audio playback and speech synthesis on Raspberry Pi Pico (RP2040/RP2350) and ESP32. It uses an interrupt-driven architecture to support MP3, AAC, WAV, and text-to-speech while keeping the main application loop responsive and dropout-free.

DeskPet is a pixel-art companion for the M5Stack Cardputer that synchronizes with Claude Code sessions via Bluetooth Low Energy (BLE). Built on the ESP32-S3 using the NimBLE stack and ArduinoJson, it provides real-time visual feedback and hardware-based command approval for AI agent workflows.

A native ESP32 implementation of the ASCOM Alpaca HTTP interface for controlling astronomical equipment. Built using the ESP-IDF framework, it supports a wide range of device types and includes UDP discovery for seamless network integration.

A polyphonic music synthesizer for the ESP32-S3 and ESP32-P4 that streams PCM WAV samples directly from an SD card. It utilizes a custom FAT32 lookup system to bypass RAM limitations, enabling the playback of massive multi-velocity sample sets with built-in ADSR envelopes and reverb effects.

Project Shadow Flight is a 1U CubeSat designed for Earth Observation, built using the FreeRTOS framework on STM32 microcontrollers. It features a modular architecture including an On-Board Computer, a dedicated sensor board, and a VGA camera payload for capturing geo-referenced imagery. The system demonstrates the use of COTS components and the CCSDS Space Data Link Protocol for reliable satellite telemetry and control.

A lightweight GPS diagnostic and information tool designed for the M5Stack Cardputer. It parses NMEA 0183 data using the TinyGPSPlus library to display real-time coordinates, satellite visibility, and sky plots. The project features configurable UART settings and microSD support for persistent configuration on ESP32-S3 hardware.

A premium Bluetooth audio receiver firmware for ESP32-WROVER modules that enables high-resolution streaming via LDAC and aptX codecs. It features a custom DSP pipeline for 3D audio enhancement, real-time LED matrix visualization, and a secure OTA recovery system built on FreeRTOS.

A robust framework and collection of examples for implementing Ethernet connectivity on Raspberry Pi Pico (RP2040/RP2350) using FreeRTOS. It integrates WIZnet's hardwired TCP/IP controllers with mbedTLS for secure MQTT and SSL/TLS communication.

This project demonstrates a streamlined method for implementing dual-boot functionality on an ESP32 using PlatformIO and the Arduino framework. By utilizing custom partition tables and the ESP-IDF OTA API, it allows users to store multiple applications on a single device and switch between them using a physical GPIO pin.

GhostBLE is a portable BLE privacy scanner and wardriving application designed for the M5Stack ecosystem, including the Cardputer and StickC series. Leveraging the NimBLE-Arduino library on the ESP32 platform, it provides real-time analysis of Bluetooth Low Energy devices, privacy posture heuristics, and GPS-tagged logging for security research and education.

This project demonstrates high-performance computer vision on the STM32N6570-DK discovery board, utilizing an NPU-accelerated quantized AI model for real-time object detection. It leverages a multi-threaded FreeRTOS architecture to manage a complex pipeline including DCMIPP image processing, hardware H.264 encoding, and USB Video Class (UVC) streaming.

An advanced embedded controller for the Icom IC-705 that decodes CI-V band data via Bluetooth or USB to manage external transverters and power amplifiers. Built for the M5Stack ecosystem using FreeRTOS, it provides automated frequency translation, PTT breakout, and seamless integration with PC-based logging and digital mode software.