https://devzone.nordicsemi.com/f/nordic-q-a/53165/gfx-example-not-working-with-st7735-lcdI am trying to run the SDK15.3.0 gfx example code - only changing line 82 to: And also I have changed the sdk_config to the display&#39;s width and height. I have wired it the same as in this https://devzone.nordicsemi.com/f/nordic-q-a/35606/st7735-interfacingen-USTelligent Community 13Mon, 28 Oct 2019 14:22:08 GMThttps://devzone.nordicsemi.com/thread/217136?ContentTypeID=1Mon, 28 Oct 2019 14:22:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6127436d-ec7c-46a9-a7a0-c7cfc6467c3dovrebekk<p>Awesome <span class="emoticon" data-url="https://devzone.nordicsemi.com/cfs-file/__key/system/emoji/1f642.svg" title="Slight smile">&#x1f642;</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/216948?ContentTypeID=1Sat, 26 Oct 2019 14:38:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:161d5701-61b1-49c1-a419-3f5d1caf0bfeJamie McCulloch<p>Yes you are correct using 3V worked.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/215301?ContentTypeID=1Wed, 16 Oct 2019 12:37:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:153785c7-d18e-4ef4-8470-312134beca8dovrebekk<p>Hi Jamie</p> <p>What is the expected voltage on the signalling pins?</p> <p>Which Arduino board are you testing it with?</p> <p>All the GPIO&#39;s on the nRF52DK are nominally around 3.0V, and&nbsp;if you supply the display with 5V (which your wiring table implies) you might have a voltage mismatch between the display and the nRF52DK.&nbsp;</p> <p>Can you try to supply the display from the 3V source and see if it works better?</p> <p>Also, double check the specification of the display to make sure it will run at this voltage.&nbsp;</p> <p>Best regards<br />Torbjørn</p><div style="clear:both;"></div>