Uptime library for Arduino boards and compatible systems
Easily read the uptime since device startup, in days, hours, minutes and milliseconds, without the 49 days overflow limitation of the millis() function.
Maintainer: Yiannis Bourkelis
This library is compatible with all architectures so you should be able to use it on all the Arduino boards.
To use this library, open the Library Manager in the Arduino IDE and install it from there.