DFU OVER BLE

If you look at the bottom of the guide, you'll  find the sample Serial DFU using external flash, which shows how to put the secondary slot in external flash. 

I would recommend you to first follow DFU over Bluetooth, then you modify that according to Serial DFU using external flash and you will end up with a sample that performs DFU over BLE and has the secondary slot in external flash.

Hi Simon,

            Thanks for the reply.

1.

user72692 said:

I would recommend you to first follow DFU over Bluetooth,

yes i had followed that and i am able to perform task succusfully.

user72692 said:

you'll  find the sample Serial DFU using external flash, which shows how to put the secondary slot in external flash. 

 yes, i got struck at this place only, am not able to understand that pm_static.yml file. that for defining the external flash.

here is the code

pm_static.yml (for nrf52840dk_nrf52840)

external_flash:
  address: 0xf4000
  end_address: 0x800000
  region: external_flash
  size: 0x70c000

mcuboot_secondary:
  address: 0x00000
  device: MX25R64
  end_address: 0xf4000
  region: external_flash
  size: 0xf4000

can you explain here what is happening. and what i have to change for my bl653dvk board.

Vinay S said:

can you explain here what is happening. and what i have to change for my bl653dvk board.

Let's continue the discussion in DFU-OTA on bl653dvk with external flash and BLE, since this is unrelated to the initial question.