Proper way to use long period timer

Question

Hi teams, 
 During development, I need quite a long period timer for hours. 
 Searching for the subject, I found application timer can only handle few minutes because of 24bit register. 
 Is there other proper way to get longer timer?

Jørgen Holmefjord · Accepted Answer

Ok, I see that the mesh models use the app_timer library. If you get static assert, the value you configurated is most likely not compatible with the mesh SDK. Did you try increasing APP_TIMER_CONFIG_RTC_FREQUENCY to 1 or 3? 
 The other alternatives are to use a second RTC for the long-running timers and configure this with a higher prescaler value, or you can run a shorter repeating app_timer and increment a variable in the handler to keep track of how long it has been running.

Dmitry · Answer

I think, in your case the easiest way is to split a long interval into a series of shorter ones, every time decreasing a counter that holds remaining time. A single wakeup every few minutes won't affect battery life time.

Proper way to use long period timer

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