Application Timer Fail with longer range in sleep.

[Kawing]

Hi Nordic , 

I develop a schedule reporter with nRF52840 , I tried to use a application timer as a weak up timer during sleep, 

If I setting the timer with shorter value (ex. 10 sec), It work fine , but once setting with longer range (ex. 1800 sec). , It would not wake up. 

And I found the os tick will reset around 512 sec . I am not sure the real root cause, and Is it a currect way to setup the timer  ?

[run_ar]

Hi, As far I am aware there is a known issue with the app_timer: https://devzone.nordicsemi.com/f/nordic-q-a/22524/app_timer-trigger-immediatly-on-sdk13

From: https://devzone.nordicsemi.com/f/nordic-q-a/34155/what-are-sdk-15-x-0-known-issues

In SDK 16 we have a newer implementation called app_timer_2. Could you try this instead?