https://devzone.nordicsemi.com/f/nordic-q-a/18324/hci-dfu-packet-header-buildingI want to update the nordic device from another MCU with HCI DFU. I cannot figure out how to write the packet header. In the Nordic documentation, it is writen to read the Bluetooth Core Specification document but the header is actually not made on theen-USTelligent Community 13Tue, 20 Dec 2016 10:07:41 GMThttps://devzone.nordicsemi.com/thread/70752?ContentTypeID=1Tue, 20 Dec 2016 10:07:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1fadcce1-a05d-45f0-a714-0d87bbba7b18PY<p>Hi Bjorn, Thank you for your answer. I&#39;ll take a look at this. Regards, PY</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/70751?ContentTypeID=1Thu, 15 Dec 2016 09:59:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:97f4b0ca-b1a2-4800-963a-828c1938ed2dbjorn-spockeli<p>Hi PHY,</p> <p>I recommend that you take a look at the pc-nrfutil v0.5.2 implementation of Serial DFU, found <a href="https://github.com/NordicSemiconductor/pc-nrfutil/releases/tag/v0.5.2">here</a>.</p> <p>Specifically, see the dfu_transport_serial.py file found in the nordicsemi/dfu folder.</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>