https://devzone.nordicsemi.com/f/nordic-q-a/41888/device-idHi, We would like having a unique device ID for each device. Can you recommend a way to do so using the nrf52840 flash? Thanks. Danielen-USTelligent Community 13Sun, 23 Dec 2018 20:57:33 GMThttps://devzone.nordicsemi.com/thread/162922?ContentTypeID=1Sun, 23 Dec 2018 20:57:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cf93210c-c3d0-436e-9c7d-e356bfa5d30dDaniel Reisfeld<p>Thanks again!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/162921?ContentTypeID=1Sun, 23 Dec 2018 20:18:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a5e95229-3487-431e-be03-3af224fe3f48Andre<p>The data is the FICR is programmed in the factory. Only Nordic can write to the FICR, so they cannot be erased or altered.</p> <p>Perhaps this question is also of interest regarding the &quot;random&quot; fields in the FICR<br /><a href="https://devzone.nordicsemi.com/f/nordic-q-a/7512/how-are-the-deviceid-deviceaddr-er-ir-values-set-in-the-ficr">https://devzone.nordicsemi.com/f/nordic-q-a/7512/how-are-the-deviceid-deviceaddr-er-ir-values-set-in-the-ficr</a><br />It&#39;s asked for the nrf51 but afaik this should apply to the whole nrf5 series.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/162920?ContentTypeID=1Sun, 23 Dec 2018 19:51:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ea35e7e5-c56d-41a5-b530-4fdbc8c127ffDaniel Reisfeld<p>Thanks Andre!</p> <p>two following questions:</p> <p>1. Does it means that there is no way to erase it?</p> <p>2. Is the encryption key is also unique?</p> <p>Thanks again,</p> <p>Daniel</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/162919?ContentTypeID=1Sun, 23 Dec 2018 19:44:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cf00ba67-644d-44f3-a53d-bd4d68c1dedcAndre<p>Every nrf52 has an unique ID from the factory, it is in FICR-&gt;DEVICE_ID and is 64 bits long.</p><div style="clear:both;"></div>