Need to set up NRF51822 to low power mode each 2 seconds.https://devzone.nordicsemi.com/f/nordic-q-a/12324/need-to-set-up-nrf51822-to-low-power-mode-each-2-secondsWe been developing device based on NRF 51822 (NRF51822-CFAC-R) (62-UFBGA, WLCSP). We plan to use 2032 battery, and need at least one year of autonomous BLE work, our device configured like Ibeacon . Now our developers have some questions regardingen-USTelligent Community 13Fri, 04 Mar 2016 14:10:22 GMTRE: Need to set up NRF51822 to low power mode each 2 seconds.https://devzone.nordicsemi.com/thread/46648?ContentTypeID=1Fri, 04 Mar 2016 14:10:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:337fe1d7-d5f2-434b-a5cb-6a0b573b5710Sergey<p>Hi,</p> <p>We will try it.</p><div style="clear:both;"></div>RE: Need to set up NRF51822 to low power mode each 2 seconds.https://devzone.nordicsemi.com/thread/46647?ContentTypeID=1Fri, 04 Mar 2016 12:04:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c09caa09-7fdf-4f7d-9e12-9e6f87a47d35H&#229;kon Alseth<p>Hi,</p> <p>Since you need to wake up every two seconds, I would recommend using the app_timer module with a repeated instance. Most of our BLE examples (if not all) use the app_timer module, so it should be straight forward to add a new instance. The app_timer module uses the RTC peripheral, which provides low consumption in sleep.</p> <p>To enter sleep, you can use the softdevice call &quot;sd_app_evt_wait()&quot; function. Between the intervals, the consumption shall then around 2-3 uA, given that no other high-speed peripherals are running (TIMERx, UART, TWI, or similar).</p> <p>Cheers, Håkon</p><div style="clear:both;"></div>