https://devzone.nordicsemi.com/f/nordic-q-a/45917/initiating-more-than-one-scanning-instance-with-sdk15-s140Hi, We are developing a new internal engineering tool that mostly does passive scanning on the NRF52840 dongle connected over USB but I&#39;d like to be able to switch to active scanning on demand. I think what I&#39;d like to do is have multiple scanningen-USTelligent Community 13Tue, 09 Apr 2019 12:19:22 GMThttps://devzone.nordicsemi.com/thread/181042?ContentTypeID=1Tue, 09 Apr 2019 12:19:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0a9d02a0-48c8-4f76-8c48-50d4c6a2a429Edvin<p>Hello Manny,</p> <p>Is the only difference with your scanning sets the scan_params.active ?</p> <p>If so, does it matter that you scan with active = true instead of switching between true or false? The difference will only be whether you send a scan request or not (to get a scan response if the advertiser has a scan response packet).</p> <p></p> <p>You can only scan with one scanning instance at the time. But it shouldn&#39;t be a problem to stop and start. Is there a reason why you don&#39;t want to do this?</p> <p></p> <p>In addition, I would recommend that you increase your scan interval and window a bit. 5 ms means that you swich scan channel every 5ms. Given that an advertisement takes roughly 0.5ms, you have a relative high chance of getting a half advertising packet, then changing channel. This means that you will miss about 1 in 10 advertising packets. It may not be a problem, but it is something to consider.&nbsp;</p> <p></p> <p>BR,</p> <p>Edvin</p><div style="clear:both;"></div>