---
title: Feather MCUs
description: The hub for documentation on Blues Cygnet and Blues Swan.
source_url: https://dev.blues.io/feather-mcus/
canonical_url: https://dev.blues.io/feather-mcus/
markdown_url: https://dev.blues.io/feather-mcus.md
---

# Feather MCUs

The hub for documentation on Blues Cygnet and Blues Swan.

## Blues Cygnet

[Cygnet](https://shop.blues.com/collections/feather-mcu/products/cygnet?utm_source=dev-blues\&utm_medium=web\&utm_campaign=store-link) is a low-cost Feather-compatible STM32L433-based microcontroller board designed to accelerate the development and deployment of battery-powered solutions.

[![Blues Cygnet](https://dev.blues.io/images/hardware/cygnet/cygnet-front.png?v=836e8b46)](https://dev.blues.io/feather-mcus/cygnet.md)

### [Cygnet Quickstart](https://dev.blues.io/quickstart/cygnet-quickstart.md)

[The place to start. This guide will help you start developing on Cygnet with Arduino.](https://dev.blues.io/quickstart/cygnet-quickstart.md)

[Start Quickstart](https://dev.blues.io/quickstart/cygnet-quickstart.md)

### [Cygnet Datasheet](https://dev.blues.io/datasheets/cygnet-datasheet/cygnet-v1-2.md)

[View detailed documentation on Cygnet's specifications, pin information, package configuration, and more.](https://dev.blues.io/datasheets/cygnet-datasheet/cygnet-v1-2.md)

[View datasheet](https://dev.blues.io/datasheets/cygnet-datasheet/cygnet-v1-2.md)

### [Using PlatformIO with Cygnet](https://dev.blues.io/feather-mcus/cygnet/using-platformio-with-cygnet.md)

[Learn how to work with Cygnet in PlatformIO, including how to install the board and flash firmware.](https://dev.blues.io/feather-mcus/cygnet/using-platformio-with-cygnet.md)

[Read guide](https://dev.blues.io/feather-mcus/cygnet/using-platformio-with-cygnet.md)

***

## Blues Swan

[Swan](https://shop.blues.com/collections/feather-mcu/products/swan?utm_source=dev-blues\&utm_medium=web\&utm_campaign=store-link) is a powerful Feather-compatible STM32L4R5-based microcontroller board. With 2MB of flash and 640KB of RAM, the Swan is ready for the demands of real-world applications.

[![Blues Swan](https://dev.blues.io/images/hardware/swan/swan-front-v3.0.png?v=62452eb6)](https://dev.blues.io/feather-mcus/swan.md)

### [Swan Quickstart](https://dev.blues.io/quickstart/swan-quickstart.md)

[The place to start. This guide will help you start developing on Swan with Arduino.](https://dev.blues.io/quickstart/swan-quickstart.md)

[Start Quickstart](https://dev.blues.io/quickstart/swan-quickstart.md)

### [Swan Datasheet](https://dev.blues.io/datasheets/swan-datasheet/swan-v3-0.md)

[View detailed documentation on Swan's specifications, pin information, package configuration, and more.](https://dev.blues.io/datasheets/swan-datasheet/swan-v3-0.md)

[View datasheet](https://dev.blues.io/datasheets/swan-datasheet/swan-v3-0.md)

### [Using PlatformIO with Swan](https://dev.blues.io/feather-mcus/swan/using-platformio-with-swan.md)

[Learn how to work with Swan in PlatformIO, including how to install the board and flash firmware.](https://dev.blues.io/feather-mcus/swan/using-platformio-with-swan.md)

[Read guide](https://dev.blues.io/feather-mcus/swan/using-platformio-with-swan.md)

### [Using CircuitPython with Swan](https://dev.blues.io/feather-mcus/swan/using-circuitpython-with-swan.md)

[Learn how to program Swan with CircuitPython.](https://dev.blues.io/feather-mcus/swan/using-circuitpython-with-swan.md)

[Read guide](https://dev.blues.io/feather-mcus/swan/using-circuitpython-with-swan.md)