How to disable ota function and spi flash on light_bulb application of matter over thread

[paper555]

How to disable ota function and spi flash on light_bulb application of matter over thread

[AHaug]

Hi,

Could you specify what version of the SDK you are using and could you specify for what reason your wish to disable the OTA function for? I'm assuming that you refer to OTA DFU in general? If so, then you must be aware that DFU is mandatory for Matter devices. 

W.r.t the external flash, it might also be required for the nRF54L15 depending on the size of your firmware. 

Kind regards,
Andreas

[paper555]

OK, Thanks! 

If I want to replace the mx25r64 in the matter demo, what do these 64 bytes of spi flash mean ?

[AHaug]

Hi,

It's external flash memory characteristics (Serial Flash Discoverable Parameters i.e SFDP). Have a look here: https://docs.nordicsemi.com/bundle/ncs-latest/page/zephyr/samples/drivers/spi_flash/README.html, here https://docs.nordicsemi.com/bundle/zephyr-apis-latest/page/group_flash_interface.html and in the JEDEC JESD216 specification which you can find here https://www.jedec.org/standards-documents/docs/jesd216b 

The parameters are used to say which properties the flash device has so that the MCU knows. The matrix is filled in either manually from the datasheet of the external flash chip, or for instance through a sample that generates this such as the spi_flash sample (if I remember correct)

Kind regards,
Andreas