It is probably a silly question, but how you upload sketches on this board?
It is silly because I had two boards and I did program one last year with the DoorOpener. Now I ham having issues.
It says that it is supposed to be a Leonardo.
So, from my Arduino IDE (Ver. 1.6.9) I chose the Leonardo board, I see that (in my case) is at COM3 and off I go, trying to upload the Blink sketch.
The IDE verifies and compiles the sketch, then I see that COM3 disappears, replaced by COM4. Of course the Upload fails.
After a few seconds, COM3 reappears and COM4 is gone.
Tried a few things, like using a different board, programmer, etc. but have not found the right combination.
You program it through the USB, right?. It must be because I never had any other programmer and I was able to make it work last year.
I don't remember having done anything special at the time....