Im testing the power consumption in my Nucleo-l412kb board while running and stop2 mode.I found huge discrepancies when I measure current in the IDD pins, powered from the USB host, respect to powering the board with an external power supply and meas...

I have implemented a fully working usart keyboard with interrupts in a Nucleo L412Kb. The main code loop checks whether a pending-key flag and no-bouncing flag are set, then scans the rows in the selected keyboard matrix column, and sends the key via...