Zephyr Projects

A Zephyr RTOS-based firmware that leverages Apple's Find My network to transmit sensor data from offline devices. It broadcasts Bluetooth Low Energy advertisements containing sensor readings, which are then forwarded by nearby Apple devices to the OpenHaystack ecosystem.

A comprehensive firmware development SDK built on the Zephyr RTOS, featuring advanced simulation with Renode and integrated control system tools. It provides extensive hardware support for over 400 boards and includes a powerful CI infrastructure for automated testing and verification.

A comprehensive Linux-based development environment specifically designed for Zephyr RTOS firmware development. It provides pre-configured Docker images containing the Zephyr SDK, cross-compilation toolchains, simulation tools like Renode, and a fully integrated suite of developer tools including Emacs and Neovim.

A comprehensive test automation framework designed to simplify the creation and execution of tests across diverse hardware platforms. It provides a client-server architecture for managing remote hardware targets, automated building, flashing, and execution, with specialized support for the Zephyr RTOS.

A firmware project for the ESP32-based Ligo Twatch v3 that implements Pebble-style health APIs. It utilizes the Zephyr RTOS and a BMA423 accelerometer to provide health tracking features and event services. The project focuses on bringing familiar Pebble smartwatch functionality to modern ESP32 hardware.

A configuration template for Visual Studio Code to support building and debugging Zephyr RTOS projects. It provides pre-configured task and launch settings for the Zephyr SDK, enabling seamless integration with Ninja and GDB for embedded development.

West is the official command-line meta-tool for the Zephyr RTOS project, designed to manage multiple Git repositories and provide a unified development workflow. It utilizes a YAML-based manifest system to coordinate project dependencies and is highly extensible through custom sub-commands.

A header-only C++20 framework for the Zephyr RTOS that wraps the native C-API with minimal runtime and memory overhead. It provides a modern C++ interface for Zephyr features like threads and synchronization primitives while maintaining high performance.

A reliable and efficient CoAPS client for Zephyr RTOS utilizing the Eclipse/TinyDTLS library. It implements DTLS 1.2 Connection ID to minimize handshake overhead and power consumption in cellular IoT applications. The project targets Nordic Semiconductor nRF91 series hardware, including the Thingy:91 and various development kits.

A collection of proof-of-concept exploits for CVE-2021-3625, a critical buffer overflow vulnerability in the Zephyr RTOS USB stack. These scripts demonstrate memory readout and DFU overflow attacks against Zephyr-based USB devices and MCUBoot builds up to version 2.5.0.

A port of the GRBL CNC firmware to the Zephyr RTOS, targeting STM32 microcontrollers like the STM32F405RG. It extends the original GRBL functionality with features such as software CDC ACM serial support, SD card integration, and TMC2130 stepper driver compatibility.

A comprehensive technical analysis and documentation project focused on the internal architecture of Zephyr OS. It covers kernel internals, device driver models, networking stacks including uIP and Contiki integration, and hardware porting for platforms like the CC2538 and Arduino Due.

A collection of example applications for the Zephyr RTOS demonstrating LoRaWAN network connectivity and LoRa point-to-point communication. It targets various hardware platforms including STM32WL and nRF52/nRF91 series microcontrollers paired with Semtech SX1276 radios.

A collection of examples and driver adaptations for using Ultra Wideband (UWB) and Bluetooth on the DWM1001 module with Zephyr RTOS. It targets the nRF52832-based hardware and provides implementations for two-way ranging, low-power listening, and UWB transmission.

A sample project for a Class A TTN LoRaWAN node built on Zephyr RTOS. It targets STM32-based boards like the Blackpill F411CE and Black F407VE, utilizing the Zephyr LoRaWAN stack and SX12xx radio drivers for connectivity to The Things Network.

A demonstration project for Zephyr RTOS showing how to use custom TrueType fonts (TTF) with the Character Framebuffer (CFB) subsystem. It targets STM32F103 'Black Pill' or 'Blue Pill' boards equipped with an SSD1306-based OLED display over SPI.

A comprehensive step-by-step guide for learning Zephyr RTOS, designed for developers with C knowledge but no prior RTOS experience. It covers fundamental concepts including threading, scheduling, GPIO, and interrupts through structured lessons and practical exercises.

The Zephyr Software Development Kit (SDK) is a comprehensive toolset providing cross-compilation toolchains and host tools for the Zephyr RTOS. It supports a wide array of architectures including ARM, RISC-V, Xtensa, and x86, and bundles essential utilities like QEMU and OpenOCD for emulation and debugging.

A demonstration application showcasing the Zephyr RTOS shell on Teensy 4.0 and 4.1 hardware. It features multi-threaded communication using message queues, hardware FPU support, and POSIX clock integration, providing a robust alternative to the standard Arduino stack for real-time control and IoT applications.

A sample application demonstrating SPI data transfer on an STM32 Nucleo-F411RE board using the Zephyr RTOS. It provides a practical implementation of SPI bus communication, leveraging Zephyr's hardware abstraction layer and build system.

A USB MIDI 1.0 device class driver for the Zephyr RTOS that enables MIDI data transmission and reception over USB. It provides a public API for MIDI messaging and includes a sample application compatible with hardware like the STM32F4 Discovery and nRF52840 DK.

A Zephyr RTOS application providing a console-based utility for Wi-Fi connectivity and network testing. It features an interactive shell for managing Wi-Fi credentials and performing TCP/UDP data transfers, specifically optimized for the STM32L4+ Discovery kit IoT.

A sample application demonstrating WebUSB functionality on STM32 microcontrollers using the Zephyr RTOS. It implements a simple echo service that communicates with a web-based application via the WebUSB API, showcasing secure browser-to-hardware connectivity.

A cross-platform Zephyr RTOS application demonstrating WiFi connectivity, DHCP, DNS resolution, and HTTP GET requests. It provides reference implementations and build configurations for ESP32-S3, ESP32-C3, Raspberry Pi Pico W, and Nordic nRF7002 hardware.

A collection of lightweight Docker images designed for building and developing ZMK firmware. These images provide a pre-configured environment with the Zephyr RTOS toolchain, Python requirements, and necessary system dependencies for various embedded architectures including ARM, RISC-V, and Xtensa.

An open-source keyboard firmware built on the Zephyr Real Time Operating System. It provides a modern, wireless-first platform for mechanical keyboards, supporting Bluetooth Low Energy, split configurations, and extensive customization through a modular system of shields and behaviors.

An open-source smartwatch project built on the Zephyr RTOS and powered by the nRF5340 dual-core BLE SoC. It features a high-resolution round touch display, a comprehensive suite of Bosch environmental and motion sensors, and seamless smartphone integration via Gadgetbridge or iOS.

A dedicated middleware module that integrates micro-ROS with the Zephyr RTOS, allowing microcontrollers to function as ROS 2 nodes. It supports multiple transport layers including Serial and UDPv4, targeting resource-constrained hardware like the STM32-based Discovery IoT kit.

A collection of MIDI application samples for the nRF Connect SDK, supporting Bluetooth Low Energy (BLE) and serial MIDI. It provides implementations for central and peripheral MIDI roles, optimized for timing and performance on Nordic Semiconductor hardware.

A Zephyr-based firmware implementation for the Blue Clover PLT Demo Board (v2), targeting the nRF52832 microcontroller. It serves as a reference platform for production line testing and hardware demonstration within the Zephyr RTOS ecosystem.

A collection of offline converter utilities for the LVGL graphics library, featuring image-to-C and font-to-C conversion scripts. These tools enable the preparation of graphical assets for embedded systems by generating compatible C arrays and binary files from standard image and font formats.

A transport-agnostic Android implementation of the McuManager protocol used to manage microcontrollers running Apache Mynewt and Zephyr. It enables over-the-air (OTA) firmware upgrades, log and statistic collection, and remote file system management.

A transport-agnostic implementation of the McuManager protocol for iOS, enabling over-the-air (OTA) firmware upgrades and device management for microcontrollers running Zephyr or Apache Mynewt. It provides a modular architecture with specialized managers for image handling, file system access, and system logging.

A demonstration project showcasing over-the-air (OTA) update capabilities using the Mender MCU client on STM32L4 hardware. It utilizes the Zephyr RTOS and a W5500 Ethernet module to connect to Mender servers for firmware deployment, remote troubleshooting, and device management.

A Zephyr RTOS-based firmware for the Laird Connectivity Sentrius MG100 Gateway. It integrates Bluetooth 5 and LTE-M/NB-IoT connectivity using the Nordic nRF52840 and Sierra Wireless HL7800, featuring local SD card logging and cloud reporting via AWS or LwM2M.

A sample project demonstrating the integration of the LVGL graphics library with Zephyr RTOS on the nRF52840 MDK development board. It provides a complete configuration for driving a 240x240 ST7789 IPS display via SPI, including necessary driver patches and device tree overlays.