https://devzone.nordicsemi.com/f/nordic-q-a/52797/there-is-a-period-during-which-advertise-packet-cannot-be-receivedThere is a period during which advertise packet cannot be received Central info SDK: 15.3 nRF52840 Peripheral info SDK: 13.1 nRF52832 Running device Central * 2 Peripheral * 10 Scan multiple Peripheral advertisements in 2 Centrals. Scan is filtereden-USTelligent Community 13Wed, 02 Oct 2019 08:08:05 GMThttps://devzone.nordicsemi.com/thread/212930?ContentTypeID=1Wed, 02 Oct 2019 08:08:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ba293534-6605-47a6-a7a0-34f4858f25dfbjorn-spockeli<p>Hi Ryuto,&nbsp;</p> <p>All though you set the scan window equal to the scan interval you will not be scanning 100% of the time. The nRF52832 only has one RADIO peripheral that scans each advertisment channel in sequence, which means that the RADIO must be reconfigured to a new frequency, which may take up to 760uS, see&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/25553/nrf52832-scan-channel-switch-time">https://devzone.nordicsemi.com/f/nordic-q-a/25553/nrf52832-scan-channel-switch-time</a></p> <p>In addition you need to take into account that the Central will use a certain percentage of the time to process the incoming ADV report event for each packet&nbsp;where it stops scanning and scanning must be restarted from SW.&nbsp;</p> <p>Lastly, there may be interference from other 2.4GHz devices and/or there might occur packet collisions due to the beacons transmitting at the same time, which will lead to packet loss.&nbsp;</p> <p>If you need loss-less behavior, then you will have to have the 10 peripherals connected to the Centrals as the SoftDevice will ensure that lost packets are re-transmitted.&nbsp;&nbsp;</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>