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Accelerate your IoT journey with a low-cost, embeddable, STM32L4-based MCU.

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Swan is a low-cost, embeddable STM32L4-based microcontroller designed to accelerate the development and deployment of battery-powered IoT solutions. It is especially useful for applications requiring large memory or a high degree of I/O expandability at an affordable cost, such as edge inferencing and remote monitoring.

Uniquely for Feather-compatible boards, we designed Swan to satisfy developers’ needs spanning from early prototyping to high-volume deployment.  Developers can use Swan in conjunction with Adafruit’s myriad sensors and FeatherWing-compatible carriers. Due to its novel design, for high-volume deployment the low-cost Swan can also be soldered directly to a parent PCB integrating those sensors, utilizing the full range of Swan’s I/O capabilities.  

The board has three independent power options – USB, battery, or line power – and provides a software-switchable 2 Amp regulator for powering external sensors. When operating in its low-power operating mode, the entire Swan board draws only 8uA while retaining all of its memory, making it ideal for battery-powered devices.

Swan features support for C/C++, Arduino, and CircuitPython, and includes a CORTEX Debug connector, enabling the use of advanced development environments such as Visual Studio Code, IAR, and STM32CubeIDE. Be sure to add an STLNK-V3MINI to get that step-debugging goodness!

Additionally, Swan now features support for Outboard DFU. This capability enables "over the air" firmware updates and does not involve firmware running on the board directly .(beginning with firmware version 3.5.1) 

Swan is available as a standalone board, in a Feather Starter Kit that includes a Notecard and Notecarrier, or as an embeddable board in manufacturing-ready trays when paired with the Notecard (visit us at blues.io to learn more).

Swan Features

  • Ultra low-power Arm Cortex-M4 core clocked at 120Mhz
  • STM32L4R5-based microcontroller
  • 2MB of flash and 640KB of RAM
  • Castellated-edge access to 55 GPIO ports including:
    • 8 analog
    • 16 digital
    • 4x I2C, 3x SPI
    • USB OTG full speed
    • 1x 14-channel DMA
    • tRNG
    • 12-bit ADC, 2 x 12-bit DAC
    • low-power RTC, and CRC calculation peripherals
  • Qwiic connector
  • Outboard DFU Support

Package Contents:

  • Swan MCU
  • 12 pin and 16 pin male headers, either loose or pre-soldered based on selection. (P/N  4UCON00815 and4 UCON00820)
  • Swan Carrier Board (if selecting the option of loose headers)

Additional Resources:

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