https://devzone.nordicsemi.com/f/nordic-q-a/96044/what-does-set-shield-ssd1306_128x32-actually-doHello, I was taking a look at the LittlevGL example today. I was able to get it working on my test bench using a 5340dk and some random Oled displays we have laying around the office. The example requires the `set(SHIELD ssd1306_128x32)` line to be addeden-USTelligent Community 13Fri, 27 Jan 2023 09:57:28 GMThttps://devzone.nordicsemi.com/thread/406812?ContentTypeID=1Fri, 27 Jan 2023 09:57:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1ca6c84a-a483-4e32-ab83-3f846623de1bNaeem Maroof<p>Hi Brian,</p> <p>The set command <a href="https://cmake.org/cmake/help/latest/command/set.html#command:set">sets</a>&nbsp;variables. <br /><br />ZEPHYR_BASE, BOARD, and SHIELD are specific zephyr <a href="https://docs.zephyrproject.org/3.2.0/develop/application/index.html#important-build-system-variables">variables </a>used during the build system.</p> <p>SHIELD is another zephyr variable also known as “add-on” or “daughter boards”, attach to a board to extend its features. In Zephyr, the shield feature provides Zephyr-formatted shield descriptions for easier compatibility with applications.</p> <p>Shield configuration files are available in the board directory under /boards/shields/</p> <p>Shield overlay, kconfig and defconfig files are present in specific sheild folder. Sheild activation can be done by:<br /><span style="font-family:&#39;courier new&#39;, courier;">either putting -DSHEILD argument in the build configuration</span><br /><span style="font-family:&#39;courier new&#39;, courier;">or setting SHIELD variable through the set command.</span></p> <p>You can read more about shields <a href="https://docs.zephyrproject.org/3.2.0/hardware/porting/shields.html#shields">here</a>.<br /><br /></p> <p>Regards,</p> <p>Naeem</p><div style="clear:both;"></div>