How to update the app via app?

[Lurn_Z]

Hello Nordic,

I am working on nRF52832 with SDK 17.1, using ESB, I previously used UART for DFU updates, but now I need to perform OTA updates via ESB.

I noticed a macro called `NRF_BL_DFU_ALLOW_UPDATE_FROM_APP` and believe that enabling it would allow the OTA process to proceed after the application has received the update package.

Is there a corresponding example available?

Hope you can give me some suggestions.

BR,

Lurn

[Hung Bui]

Hi Lurnz, 

We unfortunately don't have an official sample for that. 

Enable NRF_BL_DFU_ALLOW_UPDATE_FROM_APP is the right configuration but you need the code in the app to receive image and write some meta data correctly for the bootloader to boot and swap the image. We have a sample made long ago but could be a good place to start. Please take a look at this ticket, Vidar has provided a sample for background DFU here: 

RE: nRF52840 : update from a LTEM modem