Open Source Embedded Projects

An open-source USB power meter based on the CH32V003 RISC-V microcontroller and INA219 sensor. It monitors voltage, current, and power (up to 100W/20V/5A) and displays data on a 0.96-inch OLED screen. The project features a compact design with PD 2.0 pass-through support and includes comprehensive hardware, firmware, and 3D enclosure files.

dtuGateway is an ESP32-based firmware that bridges Hoymiles HMS-series solar inverters with integrated Wi-Fi to smart home ecosystems. It provides reliable data monitoring and remote control via MQTT, REST API, and openHAB, bypassing the limitations of the official cloud interface. The project supports various local displays and features a captive portal for easy configuration.

This project provides a MicroPython port for the Flipper Zero, enabling native Python script execution on the device. It allows developers to interface with hardware components like GPIO, ADC, PWM, and the internal speaker using Python instead of C. The application is distributed as a Flipper Application Package (FAP) and integrates the standard MicroPython library.

A technical port of the Dexed FM synthesis engine to the Raspberry Pi Pico 2 (RP2350). The project utilizes the ARM Cortex-M33 cores to achieve 10-note polyphony at 44.1kHz, supporting I2S audio output and standalone MIDI tone playback.

An ESP32-S3 based platform that enables MDB protocol communication for vending machine cashless payments and remote telemetry. It features support for EVA DTS DEX/DDCMP standards, Bluetooth connectivity via NimBLE, and integrated foot traffic analysis using a PAX counter.

FazyRV is a minimal-area RISC-V RV32 core featuring a scalable data path that can be configured to 1, 2, 4, or 8 bits at synthesis time. It is designed for resource-constrained FPGA architectures like iCE40 and ECP5, offering fine-tuned trade-offs between hardware area and performance while maintaining compatibility with the LiteX SoC builder.

This project provides optimized configurations and benchmarking tools for three common ST7789-based IPS displays with resolutions of 170x320, 240x280, and 240x320. It leverages the TFT_eSPI library to achieve high frame rates on ESP32 and RP2040 microcontrollers, including detailed wiring and setup files for various hardware platforms.

A comprehensive technical resource for the ESP32-based JC2432W328 development board, featuring an ST7789 display and capacitive touch. The repository provides a wide range of Arduino-based examples covering WiFi networking, BLE services, hardware peripherals, and LVGL graphics integration.

A LoRaWAN-enabled bridge for Bresser 868 MHz weather sensors based on ESP32 and RP2040 microcontrollers. It utilizes the RadioLib library to receive sensor data via FSK and transmit it to LoRaWAN networks like The Things Network, ChirpStack, or Helium, while focusing on low-power operation and extensive sensor support.

A comprehensive simulation framework for the Raspberry Pi RP2040 microcontroller based on Renode. It features a specialized C++ PIO simulator, support for core peripherals like DMA and I2C, and a Python-based visualization tool for virtual hardware debugging.

A high-quality sound recording application for the ESP32 that utilizes the PCM1808 ADC to capture audio via the I2S interface. The project records 32-bit monoral sound at 44.1kHz and saves the output directly to an SD card in WAV format.

A Raspberry Pi Pico firmware that converts USB MIDI signals into PWM control for four solenoid motors. It features a MOSFET-based hardware design, MIDI note mapping, and an integrated auto-sleep safety function to prevent solenoid overheating.

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.