How to calculate running time of nrf52840 or ESP32S3

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#1

Hi,
I want to calculate how long a microcontroller worked by using a kind of timer.
Could anybody help?

#2

Have you tried millis() - Arduino Reference ?

#3

Hello reivilo,

Thanks a lot for your response.
I used ESP32Time library for my question. Maybe it can help someone else as well.

Have a great day.