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CC2651R3: CC2651R3 OTA upgrade internal FLASH memory size issue

Part Number: CC2651R3
Other Parts Discussed in Thread: CC2640, CC2642R

I've made a new custom board with the CC2651R3 and I didn't realize that the executalble is bigger than on the CC2640 since there is no ROM. I have stated with project zero and removed all the things I don't need and now have a bare minimum working firmware and it's executable size is 0x2bfe3 with is more than half of the total available memory. My app is probably only taking a few kB on top of that. Is there a way to do OTA with internal flash as stated in the CC2651R3 datasheet on page 1: "Supports over-the-air upgrade (OTA)"?

I couldn't find any examples of the persistant app for the CC2651 in case this is the solution.

Any help or pointing me in the right direction would be very apprechiated.