https://devzone.nordicsemi.com/f/nordic-q-a/86732/pairingI&#39;m developing two products that will communicate via ble_uart. Both products have battery, so I need to reduce consumption as much as possible. I&#39;m currently using nrf52832 with SDK 16.0. I have a doubt about how the two devices should work so that Ien-USTelligent Community 13Fri, 08 Apr 2022 08:52:55 GMThttps://devzone.nordicsemi.com/thread/362523?ContentTypeID=1Fri, 08 Apr 2022 08:52:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:25018be9-ae65-41dc-930a-6c96caec29aeHung Bui<p>Hi Arthur,&nbsp;<br /><br /></p> <p>Could you give more information about the application you are doing ?&nbsp;<br />How often the central and peripheral need to communicate with each other ?&nbsp;<br /><br />Note that the way BLE connection is established and reestablished is that the peripheral needs to advertise and then the central can connect to it.&nbsp;<br />If the central wake up but the peripheral is not advertising, there is no way the central can re-connect to it.&nbsp;</p> <p>So what you need to do on the Peripheral&#39;s side is to continue periodically advertise when in low power mode. This can draw more power but not necessary significant more power if you only advertise, say every 1 second.&nbsp;</p> <p>&nbsp;Another option is to keep the connection all the time and only reduce the advertising interval so that you achieve low power when the connection is kept. If you do this, the sleep mode shouldnt be the deep sleep (disconnect) but only the&nbsp;idle_state_handle()/nrf_pwr_mgmt_run() function as in the examples in the SDK.&nbsp;</p><div style="clear:both;"></div>