NINA-B1 series - System Integration ManualUBX-15026175 - R09 SoftwarePage 27 of 492.3.2.2.1 Data Matrix barcodeIf your device is already erased or not responding, you will have to read out the Bluetooth device address fromthe Data Matrix barcode that can be found on the module label.Use a barcode reader capable of handling the data matrix barcodes. Remove the first 3 and the last 4 digits ofthe code read out, the remaining code is the Bluetooth device address.Example reading from the Data Matrix barcode (Bluetooth device address is marked in bold):684D4CA6EB0061302002.3.2.2.2 AT commandIf your device is still operational and running u-blox connectivity software, execute the following command toread-out the Bluetooth device address (Bluetooth device address marked in bold):AT+UMLA=1+UMLA: D4CA6EB00613OK2.3.2.3 Restoring the Bluetooth device addressWhen the new u-blox connectivity software is flashed to the module, it is important to restore the Bluetoothdevice address as well.Step 1:To enable writing of the Bluetooth device address, execute the following command and wait for the startupevent:AT+UPROD=1OK+STARTUPStep 2:To write your Bluetooth device address to the flash memory of the device and reset the device, execute thefollowing commands (Bluetooth device address is marked in bold below, replace with your own):AT+UPRODPW=1,D4CA6EB00613OKAT+CPWROFFOK+STARTUPStep 3:Verify that you have successfully written your Bluetooth Device address to the device using the followingcommand:AT+UMLA=1+UMLA: D4CA6EB00613OKThe Bluetooth device address will be permanently stored. The only way to write the Bluetoothdevice address again in case you do a mistake is to repeat the SWD flashing procedure asmentioned in section 2.3.2.1.Failing to restore the Bluetooth device address will cause some of the Bluetooth security modesnot to work.