is it possible to update Soft device in NRF52810 through DFU OTA

[Surya]

Hi,

I have developed an app using OTA DFU support. Soft device used is S112.

is it possible to update Soft device through OTA DFU?

what is the max size of the image that can be updated through OTA DFU ?

can I restrict size of the app to be uploaded?

[Vidar Berg]

Hi,

It's not possible to do an over the air upgrade of the Softdevice because of the limited flash space on this part, unfortunately. To make a Softdevice upgrade possible you would need to be able to fit the entire Softdevicve + bootloader image into bank 0 as illustrated here: SoftDevice and bootloader

what is the max size of the image that can be updated through OTA DFU ?

This depends on the size of your bank 0 region as illustrated in the documentation I linked to above. It's usually it's around 60K.

can I restrict size of the app to be uploaded?

 Only you as the owner of the private key can create an update package that will be accepted by your bootloader.