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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@bobricius
hi, I designed small board with newest stm32f072cb crystall less usb, integrated all usb resistor
https://oshpark.com/shared_projects/7YeHJutX
rgb led
reset button
usb rom bootloader
on edge connector is spi,iic/uart,dac
but 072 is only 128kb flash
I have tested one board, working dfu usb bootloader :-)