These low cost "Black Pill" STM32F411 boards are a lovely upgrade to the STM32F401. With 512KB of flash and 128KB of RAM, this board has lots of GPIO for projects. And now you can use it without a toolchain or IDE setup - all by installing CircuitPython! Here we loaded the CircuitPython build on with STM32Cube and with a few lines of code have an OLED screen showing the REPL.
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