https://devzone.nordicsemi.com/f/nordic-q-a/56116/application-timer-fail-with-longer-range-in-sleepHi 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 secen-USTelligent Community 13Thu, 02 Jan 2020 09:21:34 GMThttps://devzone.nordicsemi.com/thread/227203?ContentTypeID=1Thu, 02 Jan 2020 09:21:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6de804c5-ef05-49ed-8a86-33e23bbc820frun_ar<p>Hi, As far I am aware there is a known issue with the app_timer: <a href="https://devzone.nordicsemi.com/f/nordic-q-a/22524/app_timer-trigger-immediatly-on-sdk13">https://devzone.nordicsemi.com/f/nordic-q-a/22524/app_timer-trigger-immediatly-on-sdk13</a></p> <p>From: <a href="https://devzone.nordicsemi.com/f/nordic-q-a/34155/what-are-sdk-15-x-0-known-issues">https://devzone.nordicsemi.com/f/nordic-q-a/34155/what-are-sdk-15-x-0-known-issues</a></p> <p>In SDK 16 we have a newer implementation called app_timer_2. Could you try this instead?</p><div style="clear:both;"></div>