wraps
When a counter passes its maximum and starts again from zero.
millis() is a 32-bit unsigned count that wraps after about 49.7 days. Subtracting now - start in unsigned arithmetic still gives the right elapsed time.
When a counter passes its maximum and starts again from zero.
millis() is a 32-bit unsigned count that wraps after about 49.7 days. Subtracting now - start in unsigned arithmetic still gives the right elapsed time.