https://devzone.nordicsemi.com/f/nordic-q-a/33064/battery-powered-end-nodeI&#39;m using nRF52840-PDK. I created a custom ble service following this tutorial ( github.com/.../custom_ble_service_example) and sent my sensor data over bluetooth. Now I&#39;m trying to make it as a battery operated node whereas the bluetooth radio shoulden-USTelligent Community 13Wed, 04 Apr 2018 20:08:45 GMThttps://devzone.nordicsemi.com/thread/126926?ContentTypeID=1Wed, 04 Apr 2018 20:08:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:054c6be4-7896-4138-a5bd-a33f5081d08dFormerMember<p>When a BLE connection is established, there has to be regular contact (connection interval) between the central and peripheral. If the peripheral device wants to save power while maintain the connection, it can choose to not wake up every connection interval, only wake up every x-th interval and whenever needed. In BLE, that feature is called &quot;slave latency&quot;. Enabling slave latency is easy, just set &quot;SLAVE_LATENCY&quot; to the correct value for your application in main.c.&nbsp;I would recommend you to read <a href="https://devzone.nordicsemi.com/f/nordic-q-a/10636/what-are-latency-and-supervision-timeout-limits">this </a>thread regarding slave latency.</p> <p>Note: When using the softdevice, the RADIO is &quot;blocked&quot; by the softdevice, see &quot;<span style="font-size:10pt;"><a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s132.sds%2Fdita%2Fsoftdevices%2Fs130%2Fsd_resource_reqs%2Fhw_block_interrupt_vector.html&amp;cp=2_3_1_0_6_0">System on Chip resource requirements&nbsp;--&gt;&nbsp;Hardware peripherals</a>&quot; in the softdevice specification.</span></p> <p>&nbsp;</p><div style="clear:both;"></div>