Viewing 3 posts - 1 through 3 (of 3 total) Author Posts December 8, 2018 at 12:40 AM #10539 ferdiParticipant Hi, I have accidentally cleared the the delay before USB.detach(), and upload this to my board ( Mini Ultra Pro V2). Now my board isn’t recognized anymore. What do you think I should do ? Thanks ! December 8, 2018 at 12:54 AM #10541 LIM PHANG MOHKeymaster Hi Ferdi, On Arduino IDE, using a known simple sketch like blink, after pressing upload, double press the reset button twice in quick succession. That will put the board into bootloading mode. December 8, 2018 at 12:59 AM #10543 ferdiParticipant It worked Thanks a lot ! Author Posts Viewing 3 posts - 1 through 3 (of 3 total) You must be logged in to reply to this topic.