I have some Leonardo boards, when I load a certain application, it kills the board in that Serial no longer shows and it can not be uploaded to again via USB.
On the Leonardo - Is there a way to either reload the bootloader / reset the board or load a new application using an external usb/serial converter?
I have a FTDI Basic and tried that, but maybe due to the fact that the serial port pins are a secondary serial port, the standard method of loading a script does not seem to work. If it should work using standard pins, I'll try again. If reloading the bootloader clears the application, that may work as well, just not sure how to do that with the Leonardo. If I need an external programmer, then I may get one so I can revive and kill them over and over to see what is the root cause, etc.
Details: Working: When I plug it in, it shows Com port 70 .. then that goes away and port 71 shows and works - can be uploaded to. Broken (after loading application): When I plug it in, it shows Com port 70 .. then that goes away and port 71 does not show.