Arduino uses a 32bit counter to provide a millisecond by millisecond timing reference. In is called ‘millis()’, and being 32bit, it overflows at about 4billion in decimal – or more precisely: 4,294,967,296/(24x60x60x1,000) Which is 49days 17hours 2 minutes 47.296 seconds – according to my calculator. Timing parts of an Arduino programme (‘sketch’ in Arduino-speak) tend ...
This story continues at 49 day tick is not an Arduino time bomb, apparently
Or just read more coverage at Electronics Weekly
from Electronics Weekly https://www.electronicsweekly.com/blogs/engineer-in-wonderland/49-day-tick-not-arduino-time-bomb-apparently-2018-01/
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