Embedded Swift Example Projects

This repository is a set of demonstration projects of Embedded Swift. Embedded Swift is a compilation and language mode that enables development of baremetal, embedded and standalone software in Swift. To learn more, see:

• Blog post introducing this repository
• Swift forums thread about this repository
• Discussions about Embedded Swift on the Swift forums
• Embedded Swift Vision Document
• Documentation for Embedded Swift

Building the examples

Each example in this repository contains build and deployment instructions, however there are a couple common steps needed for many of the examples included below:

1. Install swift using the instructions here.

2. Install uv, "an extremely fast Python package and project manager", using the instructions here.

Catalog of Examples

Name	Platform	SDK	Description	Photo
esp32-led-blink-sdk	ESP32-C6-Bug	ESP-IDF SDK	Blink an LED repeatedly with Swift & the ESP-IDF.
esp32-led-strip-sdk	ESP32-C6-DevKitC-1	ESP-IDF SDK	Control NeoPixel LEDs with Swift & the ESP-IDF.
esp32-uart-echo	ESP32-C6	ESP-IDF SDK	UART echo example using Swift's print() and readLine().
harmony	Raspberry Pi Pico W	Pico SDK	A bluetooth speaker and ferrofluidic music visualizer. Firmware, Electrical, and Mechanical designs fully available.
nrfx-blink-sdk	nRF52840-DK	Zephyr SDK	Blink an LED repeatedly with Swift & Zephyr.
nuttx-riscv-blink	QEMU	NuttX	Blink a virualized led in QEMU using the Apache NuttX RTOS
rpi-4b-blink	Raspberry Pi 4B	None	Blink the Pi's status green LED repeatedly using Swift MMIO.
rpi-5-blink	Raspberry Pi 5	None	Blink the Pi's status green LED repeatedly with Swift MMIO.
rpi-pico-blink-sdk	Raspberry Pi Pico, Pico 2	Pico SDK	Blink an LED repeatedly with Swift & the Pico SDK.
rpi-pico-blink	Raspberry Pi Pico	None	Blink an LED repeatedly.
rpi-pico2-neopixel	Raspberry Pi Pico 2	None	Control Neopixel LEDs using the RP2350 PIO.
rpi-picow-blink-sdk	Raspberry Pi Pico W, Pico 2W	Pico SDK	Blink an LED to signal 'SOS' in Morse code repeatedly with Swift & the Pico SDK.
stm32-blink	STM32F746G-DISCO	None	Blink an LED repeatedly.
stm32-lcd-logo	STM32F746G-DISCO	None	Animate the Swift Logo on the built-in LCD.
stm32-lvgl	STM32F746G-DISCO	–	Baremetal setup of LCD, touch panel, DRAM, using the LLVM Embedded toolchain for ARM. Renders graphics, animations, and reacts to user input via LVGL. Includes a macOS/Linux SDL based host simulation app.
stm32-neopixel	STM32F746G-DISCO	None	Control NeoPixel LEDs using SPI.
stm32-uart-echo	STM32F746G-DISCO	None	Echo user input using UART.

Note that the SDK integration examples (Pico SDK, Zephyr SDK, etc.) are not recommendations or endorsement, the same is true for build system choice (Make, CMake, SwiftPM, shell scripts). Embedded Swift aims to be versatile and allowing integration into existing SDKs and build systems, and the example projects show some of the possibilities.

Community Examples

Name	Platform	Description
swift-matter-examples	ESP32	An Embedded Swift Matter application running on ESP32-C6.
m5stack-nano-c6-bare-swift	ESP32	A bare-metal Swift project for the M5Stack NanoC6 (ESP32-C6), running without any C, assembly, or ESP-IDF — pure Embedded Swift from bootloader to LED blink
swift-flipperzero-hello	Flipper Zero	A demonstration of running Swift apps on the Flipper Zero.
EmbeddedSwift nRF52 Examples	nRF52840 (Development Kit)	A collection of examples using Embedded Swift on top of nRF Connect SDK (Zephyr).
Swatak	nRF52840 (Seeed Studio XIAO)	A reaction time game inspired by BATAK© boards, implemented in Embedded Swift using nRF Connect SDK.
swift-picosystem-example	PicoSystem	An Embedded Swift demo running on the Pimoroni PicoSystem
pico-bare-swift	Pico	Bare-metal Raspberry Pi Pico examples in Embedded Swift — no Pico SDK required
CPicoSDK	Pico 2	SwiftPM package that enables seamless Swift development for the Raspberry Pi Pico SDK
pico-swift-sh1106	Pico 2	Display Driver for SH1106
swift-st7789-lcd	Pico 2	Display Driver for ST7789
PlaydateKit	Playdate	A full featured framework for building Playdate games using Embedded Swift.
swift-playdate-examples	Playdate	An Embedded Swift game running on Playdate by Panic.
swift-stm32c011-examples	STM32	Examples of running Embedded Swift on the STM32C011, which is a tiny MCU with only 6KB of SRAM and 32KB of flash.
flappy-swift	Web	A WebAssembly game written in Swift in ~100 KB.
swift-for-wasm-examples	Web	A "Swift Audio Workstation" example built with Swift for WebAssembly running in the browser using Embedded Swift.
swift-embedded-pebble	Pebble	An example Pebble app for the Pebble Time 2, written in Embedded Swift.

Please note that the presence of community repositories and devices in this list does not constitute a recommendation or endorsement. If there's a project you'd like to see included here, please submit an issue with the details.

Contributing to this repository

This repository contains code that is not continuously developed, instead it's presented "as is" for educational and demonstrational purposes. Making major improvements to existing examples is discouraged, but additions of new examples is welcome.

Code of Conduct

Like all Swift.org projects, we would like these Embedded Swift example projects to foster a diverse and friendly community. We expect contributors to adhere to the Swift.org Code of Conduct.

Contact information

The current code owners of this repository are Kuba Mracek (@kubamracek) and Rauhul Varma (@rauhul). You can contact them on the Swift forums via the handles @kubamracek and @rauhul.

In case of moderation issues, you can also directly contact a member of the Swift Core Team.