nrf52840 zigbee Coordniator+Router+Ble OTA required flash size

[Dhaval Dalvadi]

Hi Team,
Is it feasible to have Zigbee coordinator + router and OTA via Ble in nrf52840?
We are struggling to reduce flash size.

[Maria Gilje]

Hello,

Is it feasible to have Zigbee coordinator + router and OTA via Ble in nrf52840?

This is feasable to do implement, but you need to enable external flash for MCUboot. Some relevant documentation can be found here (nRF Connect SDK v2.9.1). The DFU/FOTA Lesson from the nRF Connect SDK Intermediate course can also be helpful, specifically the exercise which covers DFU with external flash.

We are struggling to reduce flash size.

You can also refer to the Memory footprint optimization page if you haven't already which can help to reduce the size of your application further.

Best regards,

Maria