https://devzone.nordicsemi.com/f/nordic-q-a/28857/how-to-setting-ideal-app_timer_op_queue_sizehi, My program used total 10 app_timers, like this APP_TIMER_DEF(connect_timer_id); APP_TIMER_DEF(scan_timer_id); APP_TIMER_DEF(standby_timer_id); I don&#39;t know how to setting APP_TIMER_OP_QUEUE_SIZE ? (If 10 app_timers need arrange APP_TIMER_OP_QUEUE_SIZEen-USTelligent Community 13Wed, 03 Jan 2018 10:34:01 GMThttps://devzone.nordicsemi.com/thread/114248?ContentTypeID=1Wed, 03 Jan 2018 10:34:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b546184e-cf07-44c3-90a0-79144ab1b89eJoakim Jakobsen<p>Hi CFF.K!<br /> Take a look at <a href="https://devzone.nordicsemi.com/question/723/how-big-should-app_timer_op_queue_size-be/">this answer</a>.<br /> If you have tested your application and everything workes fine, you shouldn&#39;t need to change anything.<br /> Best regards.</p><div style="clear:both;"></div>