https://devzone.nordicsemi.com/f/nordic-q-a/43084/nrf52832-sdk-15-2-0---is-it-possible-to-deny-entering-bootloaderhello everybody, In my application i want to check if a password is set, to enter bootloader, otherwise don&#39;t start the bootloader. This should work without bonding. nrf52832 / SDK 15.2.0 / s132 - Is it possible to deny entering bootloader? en-USTelligent Community 13Mon, 28 Jan 2019 14:00:59 GMThttps://devzone.nordicsemi.com/thread/168270?ContentTypeID=1Mon, 28 Jan 2019 14:00:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f5be70d8-77a1-49ef-a565-26fc7d754df4Andrej<p>First thanks for the fast reply, that&#39;s a possible solution. I thought there would be an easy way doing this.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/168262?ContentTypeID=1Mon, 28 Jan 2019 13:43:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b8452223-83fe-47d1-ab5a-62e3ac430c70Einar Thorsrud<p>Hi,</p> <p>Do you mean weather you can require a password before starting the bootloader via the buttonless DFU BLE service? If so, there is no direct support for it, but I do not see any reason why you could not implement it. You could for instance expand the buttonless DFU characteristic so that you write a password to it, and only start the bootloader in DFU mode if the password is correct.</p><div style="clear:both;"></div>