Zigbee OTA upgrade server - new firmware client repository

[Marco_A]

Good morning, 

I'am developing a Zigbee coordinator. My board has an STM32 like main core, and an nRF52840. They communicate through a serial port. 

Now I have to add the OTA cluster to update the firmware of my Zigbee network clients. I use nRF5 SDK for Thread and Zigbee v4.2.0

Can I keep the new image in my STM32 and send it to the nRF52840 one block at a time when a client ask for it? 

Or the ota image must be saved in memory of nRF52840? 

Thank you

Regards

Marco

[Elfving]

So sorry about the delay on this case, my go-to resources for Zigbee expertise has been away for a while.

Can I keep the new image in my STM32 and send it to the nRF52840 one block at a time when a client ask for it? 

Do you want to run Zigbee OTA server at nRF52840? If so, the OTA image needs to be stored at the nRF SoC.

Regards,

Elfving

[Marco_A]

Good morning Elfving,
Ok, I will store the OTA image on nRF.
Thank you for your time

Regards

Marco