https://devzone.nordicsemi.com/f/nordic-q-a/85307/use-nrf52840-to-upload-arduino-hex-to-atmega328pWe would like to use the nRF52840 to upload compiled Arduino firmware in hex file to atmega328p over serial port. The latest version of the Arduino firmware would be stored on a nRF52840 powered device. This device acts as a charger/reader for smalleren-USTelligent Community 13Wed, 02 Mar 2022 12:46:48 GMThttps://devzone.nordicsemi.com/thread/355817?ContentTypeID=1Wed, 02 Mar 2022 12:46:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d0fe463d-32c6-4ec1-80d1-260b5a28487dJared<p>Hi,</p> [quote user=""]<p>How to do such a firmware uploader on nRF52840? We would need some guidance how to implement this.</p> <p></p>[/quote] <p>We do not have any framework or example that does&nbsp;exactly this. We do have an example that shows how to do a DFU serial update on a Nordic MCU from a PC, but that isn&#39;t quite what you&#39;re asking for. <a href="https://devzone.nordicsemi.com/guides/short-range-guides/b/software-development-kit/posts/getting-started-with-nordics-secure-dfu-bootloader#h108sjziaxo3m81rkgr1has5r1d72qtu">This </a>outdated blogpost offers some codebase on how to do nRF52-nRF52 serial updates, it should at least be a good starting point.</p> <p>regards<br />Jared&nbsp;</p><div style="clear:both;"></div>