I am using this board for almost a year now, and I was programming it with PlatformIO without any problem.
This evening I tried something new: to flash the board with Bossa flash programmer and it went wrong, and now the board seems dead.
It does not show up as a COM port in Windows Device Manager. I tried to press Reset button twice to enter Bootloader mode, but it didn't help: no blue LED blinking, nothing happening at all...
I am not able to upload anything at the moment, neither with PlatformIO nor with Arduino IDE, as my compuer sees not a single COM port available.
I noticed that an orange LED blinks twice when I attach the board through micro USB cable to my computer, and it blinks once when I detach it. I don't know what that means?
What can I do now, did I completely killed it, or should I burn a new bootloader on it?