Hello,

I've been trying to build the usb_serial example and run it on a Blue Pill, which is the board being targetted by that example, but I'm getting FLASH overflow errors when building it using the dev profile.
Release fits without issue.
I've been building it with "stm32f103 medium rt stm32-usbd" features.

I

Hi, This is a nice simple library so thank you for developing it.

One thing that would be very useful is a means to extract the error in some manner after each learning epoch.
Perhaps mean error squared? this would allow us to track the progress and stop teaching the network when we are happy with the error is small enough. On top of this it will help us understand if we are improving the netw