For anyone looking for an answer to this. This thread has a working solution: http://www.rocketscream.com/blog/forums/topic/adafruit-feather-32u4-fona-wakeup-no-serial-print/
For anyone looking for an answer to this. This thread has a working solution: http://www.rocketscream.com/blog/forums/topic/adafruit-feather-32u4-fona-wakeup-no-serial-print/