Where does the MAC address come from?https://devzone.nordicsemi.com/f/nordic-q-a/341/where-does-the-mac-address-come-fromMy project has moved off the devboard and onto prototype PCBAs. I notice that they all seem to have unique MAC IDs on the air! I&#39;m not complaining (one less thing to worry about) but where does that MAC ID come from? Is it serialized in the nRF51822 chipsen-USTelligent Community 13Tue, 09 Aug 2016 17:24:24 GMTRE: Where does the MAC address come from?https://devzone.nordicsemi.com/thread/1793?ContentTypeID=1Tue, 09 Aug 2016 17:24:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:920c0838-4122-46bb-9757-0a95828b7806koniho<p>Since the MAC address is random, is there not a uniqueness guarantee? Is the MAC address editable?</p><div style="clear:both;"></div>RE: Where does the MAC address come from?https://devzone.nordicsemi.com/thread/1794?ContentTypeID=1Fri, 23 Aug 2013 05:22:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:27dd6a6a-9a58-497e-8ad9-2ce5f09bea1dOle Morten<p>The registers in question are NRF_FICR-&gt;DEVICEADDR[0] and [1]. :-)</p><div style="clear:both;"></div>RE: Where does the MAC address come from?https://devzone.nordicsemi.com/thread/1792?ContentTypeID=1Thu, 22 Aug 2013 22:54:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:675bc8c0-f515-4a97-8c6b-de3f91cbcbadCarles<p>Hi there,</p> <p>The Bluetooth address is a random number stored in a special register in flash during chip manufacturing. The SoftDevice loads this number and sets it as the default address every time it&#39;s enabled.</p> <p>Regards,</p> <p>Carles</p><div style="clear:both;"></div>