https://devzone.nordicsemi.com/f/nordic-q-a/82127/low-power-controller-scanHi, I have an unusual requirement where the current constraint device needs to the controller and passively scan. My understanding is the best way to estimate the current consumption for this is to use the receive current and that this can be duty cycleden-USTelligent Community 13Mon, 29 Nov 2021 15:07:12 GMThttps://devzone.nordicsemi.com/thread/341121?ContentTypeID=1Mon, 29 Nov 2021 15:07:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0cb77051-093e-436a-8516-22dda08a5760Kazi Afroza Sultana<p>Hello James,</p> <p>Thanks for your query. Sorry for late reply since it arrived on weekend.&nbsp;</p> <p>The examples related to central we have are mostly for longer scan windows/ intervals, scanning most of the time with high current consumption.</p> <p><span>There is a good deal of information in the SoftDevice specification, see&nbsp;</span><a title="https://infocenter.nordicsemi.com/topic/sds_s132/sds/s1xx/multilink_scheduling/suggested_intervals_windows_s132.html?cp=4_7_3_0_14_9" href="https://infocenter.nordicsemi.com/topic/sds_s132/SDS/s1xx/multilink_scheduling/suggested_intervals_windows_s132.html?cp=4_7_3_0_14_9" rel="noopener noreferrer" target="_blank">Suggested intervals and windows</a><span>. Should be applicable regardless of which SDK that is used really.</span></p> <p>For your requirement, you can set the scan window to a multiple of the advertising interval of the beacon to maximize the probability of receiving the advertisement packets. For example, if one beacon advertises at 7.5 ms, then you can set the scan window to N*7.5 ms;&nbsp; N is the multiplier which could be 3 or larger.</p> <p>Try this and let us know.</p> <p><span>Best Regards,</span></p> <p><span>Kazi Afroza Sultana</span></p><div style="clear:both;"></div>