https://devzone.nordicsemi.com/f/nordic-q-a/63157/bootload-nrf52832-over-uart-from-external-mcuHello all, I am interested in using the Secure Serial Bootloader to program my NRF52832 over UART from an external MCU. I am aware of the SDK example and creating DFU packages (I have used the BLE DFU before), but from what I&#39;m reading this exampleen-USTelligent Community 13Tue, 30 Jun 2020 13:06:26 GMThttps://devzone.nordicsemi.com/thread/257592?ContentTypeID=1Tue, 30 Jun 2020 13:06:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9a0d6c7a-d06d-407a-a9a5-db880f0c6d19J&#248;rgen Holmefjord<p>Hi,</p> <p>See appendix 6 in this <a href="https://devzone.nordicsemi.com/nordic/short-range-guides/b/software-development-kit/posts/getting-started-with-nordics-secure-dfu-bootloader#h108sjziaxo3m81rkgr1has5r1d72qtu">blog post</a>. This contains a serial DFU master code in C for a nRF52 device. You can use that code as a reference when implementing the functionality for the external MCU.</p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>