RE: How much flash and ram does zephyr need nc sdk 1.7.0

Einar Thorsrud — Mon, 04 Oct 2021 12:46:08 GMT

Hi,

Zephyr is highly configurable and only the features you use are included in the binary, so memory usage depends entirely on the project. To get a ball park number it makes sense to pick an example project that is roughly what you want and check that. For instance if you want a rough idea of a simple BLE peripheral you can build the Bluetooth: Peripheral LBS sample, which will give you this memory usage (default configuration for the nRF52 DK):

Memory region         Used Size  Region Size  %age Used
           FLASH:      154084 B       512 KB     29.39%
            SRAM:       26657 B        64 KB     40.68%