Hello, some errors encountered.
mutr:110: error: 'UDADDR' was not declared in this scope
while (UDADDR & _BV(ADDEN)) //Plugged into computer
mutr:158: error: 'gps_fix' was not declared in this scope
Thank you for your interest!
Do you have the relevant libraries installed? Are you using a board with an Atmega32u4?
This software is designed to be used with a specific board. Although it technically would work with a compatible Arduino board, I'd probably recommend against it.
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