FreeRTOS Projects

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.

An open-source energy monitoring system built on the ESP32-S3 and ADE7953 IC, capable of tracking up to 17 circuits. It features a task-based FreeRTOS architecture and supports multiple integration protocols including MQTT, Modbus TCP, and InfluxDB.

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.

This library provides an RFC2217 server implementation for the ESP-IDF framework, enabling remote serial port access over a network. Built on top of the lwIP stack and FreeRTOS, it allows Espressif chips to act as network-to-serial bridges with support for dynamic baud rate and parity configuration.

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.

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 cross-platform Python tool for real-time visualization of FreeRTOS task states over serial or TCP connections. It parses task status updates to generate live-updating bar charts using PyQt5 and Matplotlib, supporting Running, Ready, Blocked, and Suspended states with CSV export capabilities.

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.

Tiny386 is a highly portable x86 PC emulator written in C99, designed to run 16/32-bit software and operating systems like Windows 9x/NT and Linux. It features a custom i386 CPU core and emulates a wide range of vintage hardware peripherals, making it capable of booting legacy OSs on modern microcontrollers like the ESP32-S3.

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 library for ESP32 that enables firmware and filesystem (SPIFFS/LittleFS) updates over Bluetooth Low Energy. It supports both BlueDroid and NimBLE stacks, offering features like data compression, secure RSA-based signature verification, and customizable callbacks for update monitoring.

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 portable I2C bus scanner for the M5Cardputer that identifies connected devices and displays their hexadecimal addresses on the built-in screen. Built with the Arduino framework, it provides a real-time diagnostic tool for hardware debugging via the Grove connector.

A firmware for the M5Cardputer that emulates USB and BLE HID keyboard and mouse devices. It features mode switching via physical buttons and utilizes the ESP32-S3's wireless capabilities for remote input control.

A GPS logging application for the M5Cardputer platform that records location data to an SD card. It features a dual-mode operation including a power-saving sleep mode and a normal mode with real-time data display on the integrated screen.

An alarm system for the M5Cardputer platform that utilizes a PIR sensor to detect motion. The project features audible alerts, RGB LED status indicators, and an interactive display interface with adjustable volume and brightness controls.

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 mini-project that transforms the ESP32-based Cheap Yellow Display (CYD) into a standalone ANSI-VT100 serial terminal. It utilizes the FabGL library to handle terminal emulation and display output, allowing users to monitor serial data from other microcontrollers at 115200 baud without a PC.

A lightweight IEEE 1588 Precision Time Protocol (PTP) implementation optimized for resource-constrained microcontrollers. It supports both master and slave configurations, multiple transport mechanisms, and advanced clock servos like PID and Kalman filters. The library targets ARM Cortex-M platforms and integrates with lwIP or EtherLib network stacks to achieve sub-100ns synchronization precision.

A synchronization tool written in CPython and MicroPython for fetching FIT activity files from XOSS and Cycplus cyclo-computers via Bluetooth Low Energy (BLE). It implements the YMODEM protocol over the Nordic UART Service to provide an open-source alternative to proprietary mobile applications.

An optimized Nintendo Entertainment System (NES) emulator rewritten for the ESP32 platform. It supports full audio emulation and achieves native speeds on dual-core ESP32 hardware using the Arduino framework and TFT_eSPI library.

An open-source firmware for the Cuybot smart car platform based on the ESP32-C3. It utilizes FreeRTOS for efficient task management and features WebSocket communication for real-time monitoring and control. The project integrates obstacle avoidance, line following, and PWM-based motor control for educational robotics applications.

A comprehensive resource for running MicroPython and LVGL on the ESP32-2432S028R 'Cheap Yellow Display'. It provides precompiled firmwares for LVGL9 and LVGL8, specialized drivers for ILI9341 and XPT2046, and detailed guides for display calibration and UI development.

A comprehensive firmware for ESP32 microcontrollers to control Jarolift TDEF 433MHz radio shutters via a CC1101 transceiver. It provides a mobile-friendly WebUI, MQTT integration for smart home systems like Home Assistant, and advanced timer functions including sunrise and sunset triggers.

A collection of custom ESPHome components designed for Xiaomi MIoT devices that utilize the MIoT Serial Communication protocol. It enables users to replace proprietary cloud-dependent firmware with open-source alternatives for local control of air purifiers, fans, and humidifiers via Home Assistant.

A demonstration project for building a Zigbee-enabled on/off light using the M5Stack M5NanoC6 development kit. It leverages the ESP32-C6 SoC's native Zigbee support within the Arduino environment to interface with Zigbee2MQTT and Home Assistant.

A security-focused firmware for ESP32 microcontrollers that replicates Pwnagotchi-style peer detection and network interaction. It supports Wi-Fi scanning, deauthing, and BLE functions while providing an emotional interface through various display modules.

An ESP32-based IoT system designed to monitor beehive health by tracking environmental conditions, bee activity, and hive weight. It features solar power management and real-time data synchronization with Firebase for remote access via a web dashboard.

A polyphonic music synthesizer for the ESP32-S3 that plays PCM WAV samples directly from a microSD card. It features 15-20 stereo voices, ADSR envelopes, built-in reverb, and MIDI control, utilizing custom SDMMC routines for high-speed data access without preloading samples into RAM.