Feather of the Day: Adafruit Feather STM32F405 Express #Adafruit #Feather

The Adafruit Feather ecosystem is so rich with hardware diversity, we wanted to share them, one each day. Today is the Adafruit Feather STM32F405 Express!

ST takes flight in this Feather board. The new STM32F405 Feather (video) that we designed runs CircuitPython at a blistering 168MHz – our fastest CircuitPython board ever! We put a STEMMA QT / Qwiic port on the end, so you can really easily plug and play I2C sensors.

This Feather has lots of goodies:

  • STM32F405 Cortex M4 with FPU and 1MB Flash, 168MHz speed
  • 192KB RAM total – 128 KB RAM for general usage + 64 KB program-only/cache RAM
  • 3.3V logic, but almost all pins are 5V compliant!
  • USB C power and data – our first USB C Feather!
  • LiPo connector and charger
  • SD socket on the bottom, connected to SDIO port
  • 2 MB SPI Flash chip
  • Built in NeoPixel indicator
  • I2C, UART, GPIO, ADCs, DACs
  • Qwiic/STEMMA-QT connector for fast I2C connectivity
  • We use the built-in USB DFU bootloader to load firmware. It does not come with a UF2 bootloader.

With CircuitPython basics running on this board, it’s fast to get all our drivers working, then use the built in plotter in Mu to instantly get sensor data displaying within 3 minutes of unboxing.

You can use MicroPython, CircuitPython or Arduino IDE with this board, with some caveats.

USE

The Adafruit STM32F405 Feather Express Guide provides all the details and use examples.

Projects:

Would you like to see this Feather in action? Check out the project below:

In stock! You can buy the Adafruit Feather STM32F405 Express in the Adafruit shop.


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1 Comment

  1. This board is kind of pricy but that it has a fast processor stm32f405 168 Mhz and can possibly do 100s of Mflops of single precision floating point maths.
    And the few features I liked about this board is
    – the uSD slot at the bottom, the app runs within the SOC and the uSD can be simply used as external storage, practically a flash drive. with uSD capacities running in gigabytes, this is very significant as a logger etc
    – other things good about this board is the lipo charger and connector
    – and more the on board external flash etc, probably unnecessary but may be useful at times.

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