https://devzone.nordicsemi.com/f/nordic-q-a/48240/nrf9160-read-uicr-valuesHi, SDK 0.4.0 simple_mqtt project Modem mfwnrf916007029alpha I want to write an unique 4 bytes ID into each nRF9160 via nrfjprog. So that, I can set subscription topic according this ID. I can write the ID via &quot;nrfjprog --memwr 0x00ff8000en-USTelligent Community 13Mon, 10 Jun 2019 06:24:54 GMThttps://devzone.nordicsemi.com/thread/191771?ContentTypeID=1Mon, 10 Jun 2019 06:24:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:499d83d3-0e0a-4498-8f12-2367a18162abLeoChen<p>Thanks, Martin.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/191281?ContentTypeID=1Thu, 06 Jun 2019 09:26:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:02f529d6-f451-4d85-88b2-39dbc4c4156eMartin Lesund<p>Hi Leo,</p> <p>You can read out such value like this in your application:</p> <p><pre class="ui-code" data-mode="c_cpp">value = *(uint32_t *)MY_ADDRESS; </pre></p> <p></p> <p>If you want something more &quot;fancy&quot; you can use the <a href="https://github.com/NordicPlayground/fw-nrfconnect-zephyr/tree/master/samples/subsys/nvs" rel="noopener noreferrer" target="_blank">Non-Volatile Storage </a>subsystem.</p> <p></p> <p><strong>NOTE:&nbsp;</strong>Please be careful where in the flash you store these values. This is especially important if you are going to use DFU, with regards to where the different partitions are located.</p> <p></p> <p>Best Regards,<br />Martin L.</p><div style="clear:both;"></div>