https://devzone.nordicsemi.com/f/nordic-q-a/61939/spis-cannot-receive-data-using-nrf-connect-sdk-zephyrHi; I&#39;m trying to develop an application with the nrf52840 as a co-processor. We decided to use the nrf52 as a SPI slave and a SAMD21 as a SPI master. I set up a quick Arduino sketch on the SAMD21 to try to communicate with the device. I set up a SPISen-USTelligent Community 13Fri, 13 Nov 2020 12:02:23 GMThttps://devzone.nordicsemi.com/thread/279892?ContentTypeID=1Fri, 13 Nov 2020 12:02:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2b2ed2e6-4123-4fa5-8f3b-8b5169eec9adhmw<p>Hello&nbsp;</p> <p>what is your &quot;DT_ALIAS_SPI_0_LABEL&quot; mean&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/253615?ContentTypeID=1Fri, 05 Jun 2020 21:37:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c2e63659-6fad-4360-abcd-7943ae0b130dkwong<p>Oof that&#39;s an embarassing. Thanks!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/252589?ContentTypeID=1Mon, 01 Jun 2020 15:24:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:70c9e5f2-7d68-4f1f-be1c-8ce731923690Simon<p>I can see that you have not set <em>rx.len</em> to anything. Instead, you have set <em>tx.len</em> two times. Try fixing that and see if you are able to receive data.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>