We want to allow customers to do DFU in the field through a PC software via USB. Is there any guide to write a software equivalent to "nrfutil dfu usb-serial"?

[cpeng]

Hi Devzone:

I have a question that may be common for companies distributing hardware containing nrf52840 chips.

I have figured out how to use nrfutil to generate Bootloader with encryption key, new firmware zip package and use the sub-function of nrfutil "nrfutil dfu usb-serial" to send package through usb for firmware update.

For us as a company, we would like to provide new firmware zip package on our website to the customers in the future and let them do DFU through a PC software via USB in the field.

And we would like to provide that software instead of letting them use nrfutil, since there are so much things in nrfutil that they don't need as customers.

The PC software will be essentially equivalent to the sub-function of nrfutil  "nrfutil dfu usb-serial",  which is to send zip package through USB when the device is in dfu mode.

Is there any guide on how to develop such software?

Thanks.

[Hung Bui]

Hi Cpeng, 

We don't have a guide for DFU master except for the DFU protocol here. 

The nrfutil tool is provided with open source. You can find the source code here. You can create a clone version of the tool with other feature removed. If you want GUI interface, you can also have a look at our nRF Connect Programmer tool here.