https://devzone.nordicsemi.com/f/nordic-q-a/77641/writing-some-parameters-to-flash-using-nrfjprogHi all, I am developing a BLE device prototype. There will be multiple such devices. How can I write the UUIDs to flash while flashing the hex file. Or how can I get the address of the location where to write UUID? Suppose I am using static uint8_ten-USTelligent Community 13Mon, 19 Jul 2021 14:07:24 GMThttps://devzone.nordicsemi.com/thread/320740?ContentTypeID=1Mon, 19 Jul 2021 14:07:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9d8bc6ec-88c2-485a-bf4d-087d2e75ee69yikestone<p>Thanks a lot Hung for this pointer.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/320732?ContentTypeID=1Mon, 19 Jul 2021 13:58:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:38c97213-ac13-4b76-998b-6411aa5e4859Hung Bui<p>Hi Yike,&nbsp;<br /><br />If you want you can print out in the log the value of the UUID pointer so you know where it&#39;s located in the flash. Or you can set a breakpoint and check the value of the UUID pointer.&nbsp;</p> <p>But if you modify the application code, or if you use different compiler, the location of the variable/array may change. So it&#39;s better to set the array to a specified location that you choose.&nbsp;<br />To do that you can use the __attribute__ keyword. Please refer to how we configure the&nbsp;m_uicr_bootloader_start_address variable to the location&nbsp;0x10001014 in nrf_bootloader_info.c in the bootloader example, or the&nbsp;m_dfu_settings_buffer array in nrf_dfu_settings.c to address&nbsp;0x0007F000.&nbsp;</p><div style="clear:both;"></div>