I have been using this board in a countdown timer that uses the millis() function to trigger horns and leds at specific intervals. This code works on both the Uno R3 and the Osepp Nano, but when I use the Pro Micro my code misses cues and seems to be running slowly. In addition, when I try to use the serial monitor my IDE freezes. If anyone could give me some help with these issues that would be pretty sweet.
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