OTA device firmware update with external flash memory

[saiff]

Hi, i've been trying to use the external flash memory to store new images for OTA firmware update but i keep getting this error

*** Booting nRF Connect SDK v2.5.2 ***
I: Starting bootloader
W: Failed reading sectors; BOOT_MAX_IMG_SECTORS=128 - too small?
E: Image in the primary slot is not valid!
E: Unable to find bootable image

does anyone know how to solve it?

thanks in advance,

[Amanda Hsieh]

Hi, 

Due to the Easter holidays in Norway, we are less staffed than usual. You can expect a delayed answer. 

Please check this post. 

Regards,
Amanda H.

[saiff]

Hi amanda,

thank you for your response, unfortunally the solution provided in that post didn't work for me (i tried changing BOOT_MAX_IMG_SECTORS value but nothing works) so i'll be waiting for your support after the holidays.

Regards,

[Amanda Hsieh]

Are you using External flash memory? If so, please take a look at External flash memory partitions. 

[saiff]

Hi Amanda, yes i am using the external flash memory and i followed the instructions but the software just won't start, as i soon as i flash it this is all i get : 

*** Booting nRF Connect SDK v2.5.2 ***

then it freezesn is there an OTA DFU exemple using the external flash memory i can base my application on?

Thanks in advance.

Kind Regards,

[Amanda Hsieh]

Hi, 

Are you using nRF52840DK? If so, Place the following files under boards folder

2476.nrf52840dk_nrf52840.conf

4442.nrf52840dk_nrf52840.overlay

Place the following files under child_image/mcuboot/boards

2476.nrf52840dk_nrf52840.conf

4442.nrf52840dk_nrf52840.overlay

If you are not using nRF52840DK, rename the files for your board name.