How to make BLE Buttonless DFU compatible with Serial DFU

RE: How to make BLE Buttonless DFU compatible with Serial DFU

Hieu — Mon, 25 Mar 2024 22:06:24 GMT

Hi Taylor,

This approach is possible too. The SDK does not support this by default, but it was implemented in the nRF5 SDK for Zigbee and Thread.

You can find an unofficial reference code here: https://devzone.nordicsemi.com/f/nordic-q-a/46994/background-dfu-application-source-code/187534#187534. The implementation was for nRF5 SDK v15.3.0. However, the concept has remained largely the same.

Note that that reference source code is provided without warranty.

Please be informed that our team is currently having reduced availability due to the Easter holiday. There will be some delays in our response during this time, but we will respond to you at the earliest opportunity. Our apologies for the inconvenience.

RE: How to make BLE Buttonless DFU compatible with Serial DFU

Taylor — Mon, 25 Mar 2024 02:05:21 GMT

[quote userid="9456" url="~/f/nordic-q-a/109516/how-to-make-ble-buttonless-dfu-compatible-with-serial-dfu/475457"]As you have successfully implemented the BLE DFU feature, you would have known that the DFU job is done by the bootloader.[/quote]

In my app, I receive a bin file that needs to be upgraded from a 4G device. Since the size of the app's bin file is not exceeding 130K, I can write it into BANK1 after receiving it completely. What should I do next to restart and jump to the bootloader to overwrite the data from BANK1 to BANK0, and then restart to begin running the app?

RE: How to make BLE Buttonless DFU compatible with Serial DFU

Hieu — Fri, 22 Mar 2024 18:57:44 GMT

Hi Taylor,

As you have successfully implemented the BLE DFU feature, you would have known that the DFU job is done by the bootloader.

To add Serial DFU, you can just refer to the equivalent UART variant of the bootloader, and the bootloader documentation.

See:

Bootloader and DFU modules

Secure DFU Bootloader over Serial Link (UART/USB)

Hieu