Differential OTA update in nRF_Connect_SDK

[Bhumika]

Hi,

As per this link, the memory requirement of Thread 1.2 based application in nRF Connect SDK is around 487KB, over which more will be added as per application development.

So this much-required space makes it impossible to do OTA DFU over thread protocol in nRF_Connect_SDK with Thread 1.2 support added.

Is it feasible in the nRF_Connect_SDK, to do differential binary OTA update, so that it will require less memory for DFU?

In differential OTA, we will create a binary patch of the new image w.r.t existing image and do its OTA update, and can that patch be added in the existing image at node side?

One example of such an update in esp is described here. 

[Jørgen Holmefjord]

Hi,

As far as I know, there is no support for differential OTA updates. The solution used by other protocols where the stack size prevent you from fitting two partitions in the internal flash is to Using external flash memory partitions.

Best regards,
Jørgen