https://devzone.nordicsemi.com/f/nordic-q-a/38507/secure-dfu-over-meshHello, I was trying to perform DFU over mesh. My setup was as followings: 7 nrf52832 Devies. One of them is connected to my laptop. I programmed those according to this . But i made only one change and that is public key in the device page. en-USTelligent Community 13Mon, 17 Sep 2018 14:18:00 GMThttps://devzone.nordicsemi.com/thread/149078?ContentTypeID=1Mon, 17 Sep 2018 14:18:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:66bf8078-1f5c-400c-b9f8-8a07a3fc726bMttrinh<p>Hi,</p> <p>1) Yes, that would be expected. But even if it says that the DFU upgrade is finished 100%, it might take a while before it is finished sending between the nodes. You can try waiting couple minutes(2-3) and see if it works.</p> <p>2)&nbsp;No, the gateway will still forward DFU packets even if it is not programmed with the repective key.</p> <p>I suggest you to have a look at Hung&#39;s answer in this <a href="https://devzone.nordicsemi.com/f/nordic-q-a/38202/selective-dfu-over-mesh" rel="noopener noreferrer" target="_blank">post</a>, think it will give you answer on how you can do this.</p><div style="clear:both;"></div>