https://devzone.nordicsemi.com/f/nordic-q-a/119891/adding-dfu-to-peripheral-uart-example-ncs-2-9-0---flash-overflowedHello, I have an application that I have been working on that was based off of the peripheral_uart example that I am using with the nRF52832. I was trying to see if I can add DFU support. To add DFU support, I followed steps from the Lesson 9, Exerciseen-USTelligent Community 13Tue, 18 Mar 2025 14:17:45 GMThttps://devzone.nordicsemi.com/thread/527870?ContentTypeID=1Tue, 18 Mar 2025 14:17:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e7971cac-a323-4214-afc8-43420b2e3ef3Vidar Berg<p>Hello,</p> <p>You can reduce the size of the bootloader to free up more space for the MCUBoot slot pair. There was also a typo(?) in your Kconfig causing both NVS and ZMS to be enabled in your build which increased the overall flash usage.&nbsp;</p> <p><pre class="ui-code" data-mode="diff">diff --git a/Kconfig b/Kconfig index 19fa53b..3025212 100644 --- a/Kconfig +++ b/Kconfig @@ -37,7 +37,7 @@ config SETTINGS default y config ZMS - default y if !(SOC_FLASH_NRF_RRAM || SOC_FLASH_NRF_MRAM) + default y if (SOC_FLASH_NRF_RRAM || SOC_FLASH_NRF_MRAM)^M config NVS default y if !(SOC_FLASH_NRF_RRAM || SOC_FLASH_NRF_MRAM)</pre></p> <p>With the patch above and some configuration changes to MCUBoot, I was able to build your project and with some headroom left for the application.</p> <p><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1742307324187v1.png" alt=" " /></p> <p>Modified sample:</p> <p><a href="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/peripheral_5F00_uart_5F005F00_ncs_5F00_2_5F00_9_5F00_mod.zip">devzone.nordicsemi.com/.../peripheral_5F00_uart_5F005F00_ncs_5F00_2_5F00_9_5F00_mod.zip</a></p> <p>Best regards,</p> <p>Vidar</p> <p></p><div style="clear:both;"></div>