https://devzone.nordicsemi.com/f/nordic-q-a/21682/serial-bootloader-all-in-oneHi, is there a way to make a all in one bootloader image which includes Softdevice and APP in one zip? And is there an example of the DFU via a Master uC. My setting is that I have a Main CPU (STM32F4) which is connected via FTDI to a PC and shoulden-USTelligent Community 13Fri, 28 Apr 2017 07:42:17 GMThttps://devzone.nordicsemi.com/thread/85173?ContentTypeID=1Fri, 28 Apr 2017 07:42:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:695a1ed6-4bf2-422a-879b-cedd4842b8ecbjorn-spockeli<p>Hi Constantin,</p> <p>Yes, it is possible to create a combined SoftDevice and Application image using <a href="https://github.com/NordicSemiconductor/pc-nrfutil">nrfutil</a>. Assuming that you&#39;re using our Secure Bootloader. SDK v12.0.0 and later) the allowed combinations are shown in the below, which also is shown in the nrfutil documentation.</p> <p><img src="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/image_5F00_combinations.JPG" alt="image description" /></p> <p>I am afraid that we do not have any example code for implementing the DFU Controller on a Host MCU, there are simply to many differnet options to cover them all. I suggest that you take a look at the documentation of the DFU Serial Transport Layer, found <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v13.0.0/lib_dfu_transport_serial.html?cp=4_0_0_3_4_2_3">here</a>.</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>