ok, I get again FO error (after more or less 2Hrs).
if I reconnect it, a first time
I get again continuous FO error, and a second time (after a few of seconds)
this error : "Setup packet error: E", and I don't receive
more data (even if the sketch continue to go). The usb
device don't has more the usb status active in his
display (instead it has when usb connection is ok).
then, if I press the reset button, the sketch starts again, but it can't recognize the usb device, so I have to switch off supply power and then switch on. so it starts to function again!
there is a way to simulate the switch off/on of the power supply?
in my sketch, usb polling starts with
"rcode = Usb.inTransfer( DEVADDR, 1, 8, buf, 1 ); "