https://devzone.nordicsemi.com/f/nordic-q-a/22916/advertising-packets-from-the-same-device-what-s-wrongHi, I would like to detect the presence of a particular device in an environment where there are many devices advertising. The advertising packets are received by a scanner device. The scanner device has a led that should turn on when it receives anen-USTelligent Community 13Tue, 20 Jun 2017 08:57:06 GMThttps://devzone.nordicsemi.com/thread/90143?ContentTypeID=1Tue, 20 Jun 2017 08:57:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a03d7c3a-49d4-41b8-a578-3777a58ce23eendnode<p>Yes, what you describe is strange and the MAC address format also but one would need to have magic bowl to tell you why;) Can you maybe test your scanner code with advertiser where you control exactly all the parameters like MAC (adv.) address and advertising data? Then comparing these strings with data structures on scanner&#39;s side should tell you where is the problem in your code or if it works OK (and then probably you really see devices with such strange address).</p><div style="clear:both;"></div>