BLE FOTA with double application slot when update

[Wayne_Chang]

Hi all,

i am using NCS 2.4.0

I have a question is there any possible that i can use double slot to update firmware over BLE FOTA?

I already look at the website below

https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-bootloaders-and-dfu-fota/topic/exercise-3-fota-over-bluetooth-low-energy/

in lesson 8, exercise 1, there is a define call  CONFIG_SINGLE_APPLICATION_SLOT, which i can choice to use single slot to over write or double slot to swap.

but there is no  CONFIG_SINGLE_APPLICATION_SLOT at exercise 3 with BLE FOTA !

and i trace the code at mcuboot, it 

my ultimate objective is to apply both BLE FOTA and serial OTA(or uart) at same project

or is there anything that needs attention?

thanks.

[Einar Thorsrud]

Hi,

Wiht nRF Connect SDK, bluetooth updates are always done with dual application slots (never single slot). That is because the transprot must happen in the application.

[Wayne_Chang]

Hi Einar Thorsrud,

thanks for your answer

the flash map below is reading after BLE FOTA 

Are the partitions' names what I wrote correct?

if so, can I generate new app_update.bin, and use jlink or something to programming bin file to mcuboot_secondary, and then swap to mcuboot_primary ?

for example:

mcuboot_secondary:
  address: 0x85000
  end_address: 0xfe000

I programming new bin file to 0x85000 then I want mcuboot update this to app slot

[Einar Thorsrud]

Hi,

Wayne_Chang said:

Are the partitions' names what I wrote correct?

This looks good. I take it DFU works via BLE now?

Wayne_Chang said:

can I generate new app_update.bin, and use jlink or something to programming bin file to mcuboot_secondary, and then swap to mcuboot_primary ?

In principl yes, but it is not enough to just write the firmware image. There is also other metadata that is written together with the image normally via the SMP protocol. So you would have to write this in the image trailer as well via the debugger before you reset if you want to test like this.