https://devzone.nordicsemi.com/f/nordic-q-a/25218/nrf52832-bootloaderI am studying how to update the firmware through BLE at the moment. I used the example project of &quot;ble_app_buttonless_dfu&quot;, but I am having many questions that I don&#39;t understand: when the project is flashed into IC, I can only see the S132 parten-USTelligent Community 13Fri, 15 Sep 2017 12:58:27 GMThttps://devzone.nordicsemi.com/thread/99369?ContentTypeID=1Fri, 15 Sep 2017 12:58:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d718e3fb-aa96-46e9-8365-f3a6a7f28cd3MartinBL<p>Hi,</p> <p>Yes, the bootloader is a sepparate hex file and has to be programmed separately. The bootloader project is located in &quot;SDK_14.0.0\examples\dfu\bootloader_secure_ble&quot;.</p> <p>I suggest that you have look at <a href="https://devzone.nordicsemi.com/blogs/1085/getting-started-with-nordics-secure-dfu-bootloader/">this blog/tutorial</a> and also make sure to read the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v14.0.0/examples_bootloader.html?cp=4_0_0_4_3">documentation of the DFU examples</a>. It might be a lot to read, but very useful.</p><div style="clear:both;"></div>