I am new in Arduino, and I would like to program with bootloader my newest leonardo board (CDC-ACM serial).
I can program it with arduino IDE, but I would like to use my own hex files.
I press the button, flashing the led with boot mode, In the device manager I see the proper COM port. But I receive this error:
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x3f
avrdude -F -cstk500v1 -pm32u4 -P COM15 -b19200 -v
I know that the flashing is missing, but it doesn't connect.