It support only detect and display as LED fade blink the Fault occur or not . It is to less and not enough. So, we want to add the way to know what type fault occur as below. nmi hardfault memmanage ...

Arduino_STM32 library is based on Leaflabs Maple_mini board and hardware. And on-board ERROR_LED connected to PB1. So, libmaple library support this ERROR_LED as ...