https://devzone.nordicsemi.com/f/nordic-q-a/22223/identifying-ble-dfu-targetWe have both nrf51 and nrf52 running DFU. How can I identify on the mobile application side whether I&#39;m connecting to nrf51 or nrf52? They will need to get different firmware hex file updates. There are obviously some trivial solutions (say, differenten-USTelligent Community 13Mon, 22 May 2017 11:01:54 GMThttps://devzone.nordicsemi.com/thread/87320?ContentTypeID=1Mon, 22 May 2017 11:01:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4e515063-f33a-47f9-a44b-cef27c7bbaa9Hung Bui<p>Changing the device name would be the easiest solution. If you don&#39;t want to change device name, you can add some data in advertising packet. You can add any data using Manufacturer Data field. Please have a look at advertising_data_init() function in main.c in ble_app_pwr_profilling example. Of course you need to use your app to read this data and then decide to use which firmware to do DFU.</p><div style="clear:both;"></div>