I’ve got a Core which is misbehaving… I can’t get it to do anything with the USB serial.
I’ve plugged it into various machines, used different cables, tried Windows and Linux - and it just won’t show up (either a a COM in Device Manager in Windows, or as /dev/ttyACM0 or /dev/ttyUSB0 or in dmesg in Linux).
It successfully draws power from the USB through.
I’ve tried clearing memory and factory reset. It connects to the WiFi fine, and I can reflash it from the Web IDE. I first noticed the issue when I wanted to use Serial.begin() in a app - but now I’ve realised it might be a wider issue.