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. https://elecena.pl/product/17502465/adafruit-feather-stm32f405-express 2021-04-07 https://elecena.pl/product/17502465/adafruit-feather-stm32f405-express 2025-09-22