https://devzone.nordicsemi.com/f/nordic-q-a/8751/advertising-not-linked-stateHello everybody, I am currently experimenting with BLE on the nRF51-Ek. At measurement on the oscilloscope, the BLE protocol shows a behavior that I do not quite understand or i do not know in which documentation i can read up on it. Here is a pictureen-USTelligent Community 13Mon, 17 Aug 2015 13:28:11 GMThttps://devzone.nordicsemi.com/thread/32090?ContentTypeID=1Mon, 17 Aug 2015 13:28:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:07782daf-6012-409b-b699-2ffd198be234m1zol3<p>Thank you.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/32089?ContentTypeID=1Sun, 16 Aug 2015 15:09:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:09e56a2f-3924-45c0-964a-2c82b5a62735Ulrich Myhre<p>Hi</p> <p>This is quite normal.</p> <p>Advertising in BLE works like this: For each available channel (default 37, 38 and 39) send an advertisement, then wait for a scan request or connect request to come ~150 us after. If this request arrives, and the peer is in the whitelist (in cases where whitelist is being used) then the advertiser will either: send a scan response and continue to the next channel OR go into a connection with the peer and stop the advertiser.</p> <p>I would recommend reading an introduction to BLE - or even the spec itself - if you are interested in deciphering more scenarios like this.</p><div style="clear:both;"></div>