So I just got the Gemma M0 and working on this project but with only the 12 pixel Neopixel ring:
I got the Gemma recognized, Was able to add the board to arduino IDE as well as set the port. I then loaded the code up and it worked. My neopixels started lighting up. I changed some variables and loaded it a few times and it worked. Then I did it again, the loading bar started stalling and then it froze. I had to unplug it and now the port is missing and I don't know how to get it back. Can any one halp!