https://devzone.nordicsemi.com/f/nordic-q-a/84515/spi-slave-on-nrf52840-under-zephyrI can not get the SPI Slave function working on nRF52840 (nrf52840dk_nrf52840 board) In the nrf52840dk_nrf52840.overlay I wrote: &amp;spi1 { compatible = &quot;nordic,nrf-spi&quot;; label = &quot;SPI_1&quot;; status = &quot;okay&quot;; sck-pin = &lt;31&gt;; mosi-pin = &lt;30&gt;; miso-pin = &lt;40en-USTelligent Community 13Tue, 08 Feb 2022 10:29:21 GMThttps://devzone.nordicsemi.com/thread/351738?ContentTypeID=1Tue, 08 Feb 2022 10:29:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:50a9ffb0-dc46-4a1c-b8b6-5d2253604272&#216;ivind<p>Hi,</p> <p>in your overlay, put &#39; compatible = &quot;nordic,nrf-spis&quot;; &#39;. That should avoid the &quot;Slave mode is not supported&quot; error.</p><div style="clear:both;"></div>