RE: nrf5 Bootloader RAM consumption on nrf52810

SwRa — Wed, 19 Nov 2025 13:04:19 GMT

Hi Ankur,

On the nRF52810, SRAM is indeed a critical resource, especially when using both the SoftDevice and the Secure DFU bootloader. A few points that you can consider are:

Make sure that you are using release build of the bootloader. It is stated in documentation that the debug version of the Secure DFU bootloader cannot be used together with the example on nRF52810.

If the bootloader is large even after using the release build, optimize it further by disabling unused features in sdk_config.h, ensuring you are not including unnecessary modules or logging, removing debug code and assertions, etc.

If you still cannot fit within the available RAM, you may have reached the practical limits of the nRF52810 for this use case and you may need to consider a device with more RAM (like the nRF52832)

Regards,

Swathy