Segger J-link, Adafruit Metro M4 -> USB dies when debug starts

Hi Ryan,

Awesome, I uploaded the code without a bootloader (I found this very helpful post) and my windows serial port still stays disappeared (it shows as an “Unknown USB device (Device descriptor request failed)”.

I’m brand new to this, so your other hint was also super helpful. I removed all breakpoints and now I can get into the serial console when I start the code!

Much appreciated!!!

Bas